November 2016 - LKP - Ml01.01.Org

Re: [LKP] [rcu] kernel BUG at include/linux/pagemap.h:149!

by Frederic Weisbecker

On Fri, Sep 11, 2015 at 10:19:47AM +0800, Boqun Feng wrote: > Subject: [PATCH 01/27] rcu: Don't disable preemption for Tiny and Tree RCU > readers > > Because preempt_disable() maps to barrier() for non-debug builds, > it forces the compiler to spill and reload registers. Because Tree > RCU and Tiny RCU now only appear in CONFIG_PREEMPT=n builds, these > barrier() instances generate needless extra code for each instance of > rcu_read_lock() and rcu_read_unlock(). This extra code slows down Tree > RCU and bloats Tiny RCU. > > This commit therefore removes the preempt_disable() and preempt_enable() > from the non-preemptible implementations of __rcu_read_lock() and > __rcu_read_unlock(), respectively. > > For debug purposes, preempt_disable() and preempt_enable() are still > kept if CONFIG_PREEMPT_COUNT=y, which makes the detection of sleeping > inside atomic sections still work in non-preemptible kernels. > > Signed-off-by: Boqun Feng <boqun.feng(a)gmail.com> > Signed-off-by: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com> > --- > include/linux/rcupdate.h | 6 ++++-- > include/linux/rcutiny.h | 1 + > kernel/rcu/tree.c | 9 +++++++++ > 3 files changed, 14 insertions(+), 2 deletions(-) > > diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h > index d63bb77..6c3cece 100644 > --- a/include/linux/rcupdate.h > +++ b/include/linux/rcupdate.h > @@ -297,12 +297,14 @@ void synchronize_rcu(void); > > static inline void __rcu_read_lock(void) > { > - preempt_disable(); > + if (IS_ENABLED(CONFIG_PREEMPT_COUNT)) > + preempt_disable(); preempt_disable() is a no-op when !CONFIG_PREEMPT_COUNT, right? Or rather it's a barrier(), which is anyway implied by rcu_read_lock(). So perhaps we can get rid of the IS_ENABLED() check?

1 year, 7 months

4
4
0 / 0

[lkp] [x86/acpi] dc6db24d24: BUG: unable to handle kernel paging request at 0000116007090008

by kernel test robot

FYI, we noticed the following commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master commit dc6db24d2476cd09c0ecf2b8d80313539f737a89 ("x86/acpi: Set persistent cpuid <-> nodeid mapping when booting") in testcase: vm-scalability with following parameters: runtime: 300 thp_enabled: never thp_defrag: never nr_task: 1 nr_pmem: 1 test: swap-w-rand cpufreq_governor: performance The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us. on test machine: 72 threads Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz with 128G memory caused below changes: +------------------------------------------------------------------+------------+------------+ | | 8ad893faf2 | dc6db24d24 | +------------------------------------------------------------------+------------+------------+ | boot_successes | 7 | 0 | | boot_failures | 9 | 16 | | invoked_oom-killer:gfp_mask=0x | 6 | 2 | | Mem-Info | 6 | 2 | | Out_of_memory:Kill_process | 6 | | | page_allocation_failure:order:#,mode:#(GFP_KERNEL|__GFP_NORETRY) | 2 | | | warn_alloc_failed+0x | 2 | | | BUG:kernel_hang_in_test_stage | 2 | 2 | | BUG:kernel_reboot-without-warning_in_test_stage | 1 | | | BUG:unable_to_handle_kernel | 0 | 12 | | Oops | 0 | 12 | | RIP:get_partial_node | 0 | 12 | | calltrace:devtmpfsd | 0 | 12 | | RIP:_raw_spin_lock_irqsave | 0 | 9 | | general_protection_fault:#[##]SMP | 0 | 3 | | RIP:native_queued_spin_lock_slowpath | 0 | 3 | | Kernel_panic-not_syncing:Hard_LOCKUP | 0 | 3 | | RIP:load_balance | 0 | 2 | | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 0 | 2 | | WARNING:at_lib/list_debug.c:#__list_add | 0 | 1 | | calltrace:_do_fork | 0 | 1 | | RIP:resched_curr | 0 | 1 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 1 | | WARNING:at_include/linux/uaccess.h:#__probe_kernel_read | 0 | 5 | | Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 0 | 2 | +------------------------------------------------------------------+------------+------------+ [ 9.531507] pci 0000:80:02.2: bridge window [mem 0x387fffd00000-0x387fffefffff 64bit pref] [ 9.541378] pci_bus 0000:80: on NUMA node 2 [ 9.546734] ACPI: Enabled 4 GPEs in block 00 to 3F [ 9.586911] BUG: unable to handle kernel paging request at 0000116007090008 [ 9.595109] IP: [<ffffffff811e50fc>] get_partial_node+0x2c/0x1c0 [ 9.602933] PGD 0 [ 9.605503] Oops: 0000 [#1] SMP [ 9.609264] Modules linked in: [ 9.613005] CPU: 24 PID: 585 Comm: kdevtmpfs Not tainted 4.8.0-rc1-00300-gdc6db24d #1 [ 9.622193] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS SE5C610.86B.01.01.0008.021120151325 02/11/2015 [ 9.634299] task: ffff880068040000 task.stack: ffff880068024000 [ 9.641168] RIP: 0010:[<ffffffff811e50fc>] [<ffffffff811e50fc>] get_partial_node+0x2c/0x1c0 [ 9.651890] RSP: 0000:ffff8800680279f0 EFLAGS: 00010006 [ 9.658079] RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000002098020 [ 9.666308] RDX: ffff882053b9cfc0 RSI: 0000116007090000 RDI: ffff880076804dc0 [ 9.674535] RBP: ffff880068027a90 R08: ffff882053b9cfb0 R09: 0000000000000000 [ 9.682764] R10: ffff880068027c88 R11: 0000000b00000000 R12: ffff880076804dc0 [ 9.690994] R13: 0000000000000000 R14: ffff880076804dc0 R15: ffff882053b9cfb0 [ 9.699224] FS: 0000000000000000(0000) GS:ffff882053b80000(0000) knlGS:0000000000000000 [ 9.708701] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 9.715373] CR2: 0000116007090008 CR3: 0000000001e06000 CR4: 00000000001406e0 [ 9.723602] Stack: [ 9.726094] ffff88207ffd4080 0000000200000000 0000000000000000 0000000002281220 [ 9.735086] 0000000000000000 0000000000000000 ffffffff82343f68 ffff880068040000 [ 9.744080] ffff880068027a88 ffffffff811d9de5 ffff880068040000 ffffffff82343f70 [ 9.753072] Call Trace: [ 9.756056] [<ffffffff811d9de5>] ? alloc_pages_current+0x95/0x140 [ 9.763223] [<ffffffff811e551a>] ___slab_alloc+0x28a/0x4b0 [ 9.769696] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140 [ 9.776379] [<ffffffff813e2356>] ? selinux_inode_permission+0xc6/0x180 [ 9.784032] [<ffffffff811e4342>] ? new_slab+0x2d2/0x5a0 [ 9.790208] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140 [ 9.796881] [<ffffffff811e5760>] __slab_alloc+0x20/0x40 [ 9.803067] [<ffffffff811e6b7f>] kmem_cache_alloc+0x17f/0x1c0 [ 9.809837] [<ffffffff813dd477>] avc_alloc_node+0x27/0x140 [ 9.816317] [<ffffffff813dd87a>] avc_compute_av+0x8a/0x1e0 [ 9.822801] [<ffffffff8121000a>] ? sget_userns+0x4ca/0x4e0 [ 9.829289] [<ffffffff813de596>] avc_has_perm+0x136/0x190 [ 9.835673] [<ffffffff810a4a69>] ? __might_sleep+0x49/0x80 [ 9.842161] [<ffffffff813e0000>] ? inode_doinit_with_dentry+0x530/0x660 [ 9.849901] [<ffffffff813f4c5d>] ? security_transition_sid+0x2d/0x40 [ 9.857351] [<ffffffff813e1379>] may_create+0xb9/0xe0 [ 9.863334] [<ffffffff813e13e2>] selinux_inode_mknod+0x42/0x80 [ 9.870201] [<ffffffff813da552>] security_inode_mknod+0x52/0x80 [ 9.877165] [<ffffffff812197e1>] vfs_mknod+0x131/0x1e0 [ 9.883255] [<ffffffff815b2e65>] handle_create+0x75/0x1e0 [ 9.889639] [<ffffffff8192da66>] ? __schedule+0x2e6/0x790 [ 9.896027] [<ffffffff815b3104>] devtmpfsd+0x134/0x180 [ 9.902117] [<ffffffff815b2fd0>] ? handle_create+0x1e0/0x1e0 [ 9.908792] [<ffffffff8109ded4>] kthread+0xd4/0xf0 [ 9.914503] [<ffffffff81932cbf>] ret_from_fork+0x1f/0x40 [ 9.920788] [<ffffffff8109de00>] ? kthread_create_on_node+0x180/0x180 [ 9.928335] Code: 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 f0 48 83 ec 70 48 85 f6 48 c7 44 24 20 00 00 00 00 0f 84 54 01 00 00 <48> 83 7e 08 00 0f 84 49 01 00 00 48 89 f3 49 89 fd 48 89 f7 89 [ 9.954843] RIP [<ffffffff811e50fc>] get_partial_node+0x2c/0x1c0 [ 9.962756] RSP <ffff8800680279f0> [ 9.966902] CR2: 0000116007090008 [ 9.970871] BUG: unable to handle kernel paging request at 0000000100000048 [ 9.979058] IP: [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50 [ 9.986582] PGD 0 [ 9.989147] Oops: 0002 [#2] SMP [ 9.992891] Modules linked in: [ 9.996623] CPU: 24 PID: 585 Comm: kdevtmpfs Tainted: G D 4.8.0-rc1-00300-gdc6db24d #1 [ 10.007173] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS SE5C610.86B.01.01.0008.021120151325 02/11/2015 [ 10.019279] task: ffff880068040000 task.stack: ffff880068024000 [ 10.026147] RIP: 0010:[<ffffffff819329b9>] [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50 [ 10.036577] RSP: 0000:ffff8800680276e0 EFLAGS: 00010046 [ 10.042763] RAX: 0000000000000000 RBX: 0000000000000097 RCX: ffffffff81e5af08 [ 10.050991] RDX: 0000000000000001 RSI: ffff880068027738 RDI: 0000000100000048 [ 10.059221] RBP: ffff8800680276e8 R08: 0000000000000001 R09: 0000000000000001 [ 10.067450] R10: ffff880068027c88 R11: 000000000000048c R12: 0000000100000048 [ 10.075677] R13: 0000000000000008 R14: ffff880068027738 R15: 0000000000000046 [ 10.083906] FS: 0000000000000000(0000) GS:ffff882053b80000(0000) knlGS:0000000000000000 [ 10.093384] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 10.100059] CR2: 0000000100000048 CR3: 0000000001e06000 CR4: 00000000001406e0 [ 10.108288] Stack: [ 10.110780] 0000000100000000 ffff880068027718 ffffffff81575da0 ffffffff82263b00 [ 10.119773] ffff880068027738 0000000000000008 ffffffff8107e58f ffff880068027728 [ 10.128764] ffffffff81575e4f ffff880068027798 ffffffff8157726f ffff880068027790 [ 10.137756] Call Trace: [ 10.140741] [<ffffffff81575da0>] _extract_crng+0x40/0xb0 [ 10.151150] [<ffffffff8107e58f>] ? print_oops_end_marker+0x3f/0x60 [ 10.158405] [<ffffffff81575e4f>] extract_crng+0x3f/0x50 [ 10.164591] [<ffffffff8157726f>] get_random_bytes+0x6f/0x1a0 [ 10.171268] [<ffffffff810d811a>] ? console_unlock+0x33a/0x610 [ 10.178048] [<ffffffff8107e58f>] print_oops_end_marker+0x3f/0x60 [ 10.185106] [<ffffffff8107e5cd>] oops_exit+0x1d/0x30 [ 10.191009] [<ffffffff8103091e>] oops_end+0x7e/0xd0 [ 10.196815] [<ffffffff81066592>] no_context+0x112/0x380 [ 10.203002] [<ffffffff81066881>] __bad_area_nosemaphore+0x81/0x1c0 [ 10.210257] [<ffffffff810669d4>] bad_area_nosemaphore+0x14/0x20 [ 10.217219] [<ffffffff81066d6c>] __do_page_fault+0xbc/0x4d0 [ 10.223796] [<ffffffff8146b47d>] ? list_del+0xd/0x30 [ 10.229690] [<ffffffff810671b0>] do_page_fault+0x30/0x80 [ 10.235972] [<ffffffff81933f48>] page_fault+0x28/0x30 [ 10.241965] [<ffffffff811e50fc>] ? get_partial_node+0x2c/0x1c0 [ 10.249610] [<ffffffff811d9de5>] ? alloc_pages_current+0x95/0x140 [ 10.256771] [<ffffffff811e551a>] ___slab_alloc+0x28a/0x4b0 [ 10.263249] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140 [ 10.269921] [<ffffffff813e2356>] ? selinux_inode_permission+0xc6/0x180 [ 10.277564] [<ffffffff811e4342>] ? new_slab+0x2d2/0x5a0 [ 10.283749] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140 [ 10.290421] [<ffffffff811e5760>] __slab_alloc+0x20/0x40 [ 10.296607] [<ffffffff811e6b7f>] kmem_cache_alloc+0x17f/0x1c0 [ 10.303379] [<ffffffff813dd477>] avc_alloc_node+0x27/0x140 [ 10.309848] [<ffffffff813dd87a>] avc_compute_av+0x8a/0x1e0 [ 10.316326] [<ffffffff8121000a>] ? sget_userns+0x4ca/0x4e0 [ 10.322806] [<ffffffff813de596>] avc_has_perm+0x136/0x190 [ 10.329184] [<ffffffff810a4a69>] ? __might_sleep+0x49/0x80 [ 10.335660] [<ffffffff813e0000>] ? inode_doinit_with_dentry+0x530/0x660 [ 10.343403] [<ffffffff813f4c5d>] ? security_transition_sid+0x2d/0x40 [ 10.350855] [<ffffffff813e1379>] may_create+0xb9/0xe0 [ 10.356849] [<ffffffff813e13e2>] selinux_inode_mknod+0x42/0x80 [ 10.363716] [<ffffffff813da552>] security_inode_mknod+0x52/0x80 [ 10.370680] [<ffffffff812197e1>] vfs_mknod+0x131/0x1e0 [ 10.376770] [<ffffffff815b2e65>] handle_create+0x75/0x1e0 [ 10.383151] [<ffffffff8192da66>] ? __schedule+0x2e6/0x790 [ 10.389533] [<ffffffff815b3104>] devtmpfsd+0x134/0x180 [ 10.395622] [<ffffffff815b2fd0>] ? handle_create+0x1e0/0x1e0 [ 10.402299] [<ffffffff8109ded4>] kthread+0xd4/0xf0 [ 10.408001] [<ffffffff81932cbf>] ret_from_fork+0x1f/0x40 [ 10.414284] [<ffffffff8109de00>] ? kthread_create_on_node+0x180/0x180 [ 10.421829] Code: 00 00 0f 1f 44 00 00 55 48 89 e5 53 9c 58 0f 1f 44 00 00 48 89 c3 fa 66 0f 1f 44 00 00 65 ff 05 9e a8 6d 7e 31 c0 ba 01 00 00 00 <f0> 0f b1 17 85 c0 75 06 48 89 d8 5b 5d c3 89 c6 e8 22 74 79 ff [ 10.448339] RIP [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50 [ 10.455959] RSP <ffff8800680276e0> [ 10.460101] CR2: 0000000100000048 [ 10.464058] BUG: unable to handle kernel paging request at 0000000100000048 [ 10.472244] IP: [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50 [ 10.479768] PGD 0 [ 10.482332] Oops: 0002 [#3] SMP [ 10.486089] Modules linked in: [ 10.489822] CPU: 24 PID: 585 Comm: kdevtmpfs Tainted: G D 4.8.0-rc1-00300-gdc6db24d #1 [ 10.500366] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS SE5C610.86B.01.01.0008.021120151325 02/11/2015 [ 10.512467] task: ffff880068040000 task.stack: ffff880068024000 [ 10.519334] RIP: 0010:[<ffffffff819329b9>] [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50 [ 10.529765] RSP: 0000:ffff8800680273d0 EFLAGS: 00010046 [ 10.535952] RAX: 0000000000000000 RBX: 0000000000000097 RCX: ffffffff81e5af08 [ 10.544183] RDX: 0000000000000001 RSI: ffff880068027428 RDI: 0000000100000048 [ 10.552410] RBP: ffff8800680273d8 R08: 0000000000000001 R09: 0000000000000001 [ 10.560641] R10: ffff880068027c88 R11: 00000000000004d1 R12: 0000000100000048 [ 10.568869] R13: 0000000000000008 R14: ffff880068027428 R15: 0000000000000046 [ 10.577097] FS: 0000000000000000(0000) GS:ffff882053b80000(0000) knlGS:0000000000000000 [ 10.586578] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 10.593250] CR2: 0000000100000048 CR3: 0000000001e06000 CR4: 00000000001406e0 [ 10.601479] Stack: [ 10.603969] 0000000100000000 ffff880068027408 ffffffff81575da0 ffffffff82263b00 [ 10.612968] ffff880068027428 0000000000000008 ffffffff8107e58f ffff880068027418 [ 10.621966] ffffffff81575e4f ffff880068027488 ffffffff8157726f ffff880068027480 [ 10.630963] Call Trace: [ 10.633942] [<ffffffff81575da0>] _extract_crng+0x40/0xb0 [ 10.640228] [<ffffffff8107e58f>] ? print_oops_end_marker+0x3f/0x60 [ 10.647484] [<ffffffff81575e4f>] extract_crng+0x3f/0x50 [ 10.653670] [<ffffffff8157726f>] get_random_bytes+0x6f/0x1a0 [ 10.660342] [<ffffffff810d811a>] ? console_unlock+0x33a/0x610 [ 10.667113] [<ffffffff8107e58f>] print_oops_end_marker+0x3f/0x60 [ 10.674173] [<ffffffff8107e5cd>] oops_exit+0x1d/0x30 [ 10.680069] [<ffffffff8103091e>] oops_end+0x7e/0xd0 [ 10.685868] [<ffffffff81066592>] no_context+0x112/0x380 [ 10.692059] [<ffffffff81457b18>] ? put_dec+0x18/0xa0 [ 10.697962] [<ffffffff81066881>] __bad_area_nosemaphore+0x81/0x1c0 [ 10.705218] [<ffffffff810669d4>] bad_area_nosemaphore+0x14/0x20 [ 10.712183] [<ffffffff81066d6c>] __do_page_fault+0xbc/0x4d0 [ 10.718756] [<ffffffff810671b0>] do_page_fault+0x30/0x80 [ 10.725040] [<ffffffff8109f061>] ? atomic_notifier_call_chain+0x21/0x30 [ 10.732783] [<ffffffff81933f48>] page_fault+0x28/0x30 [ 10.738777] [<ffffffff819329b9>] ? _raw_spin_lock_irqsave+0x29/0x50 [ 10.746132] [<ffffffff81575da0>] _extract_crng+0x40/0xb0 [ 10.752415] [<ffffffff8107e58f>] ? print_oops_end_marker+0x3f/0x60 [ 10.759671] [<ffffffff81575e4f>] extract_crng+0x3f/0x50 [ 10.765856] [<ffffffff8157726f>] get_random_bytes+0x6f/0x1a0 [ 10.772530] [<ffffffff810d811a>] ? console_unlock+0x33a/0x610 [ 10.779301] [<ffffffff8107e58f>] print_oops_end_marker+0x3f/0x60 [ 10.786364] [<ffffffff8107e5cd>] oops_exit+0x1d/0x30 [ 10.792257] [<ffffffff8103091e>] oops_end+0x7e/0xd0 [ 10.798057] [<ffffffff81066592>] no_context+0x112/0x380 [ 10.804244] [<ffffffff81066881>] __bad_area_nosemaphore+0x81/0x1c0 [ 10.811498] [<ffffffff810669d4>] bad_area_nosemaphore+0x14/0x20 [ 10.818463] [<ffffffff81066d6c>] __do_page_fault+0xbc/0x4d0 [ 10.825037] [<ffffffff8146b47d>] ? list_del+0xd/0x30 [ 10.830933] [<ffffffff810671b0>] do_page_fault+0x30/0x80 [ 10.837216] [<ffffffff81933f48>] page_fault+0x28/0x30 [ 10.843208] [<ffffffff811e50fc>] ? get_partial_node+0x2c/0x1c0 [ 10.850855] [<ffffffff811d9de5>] ? alloc_pages_current+0x95/0x140 [ 10.858015] [<ffffffff811e551a>] ___slab_alloc+0x28a/0x4b0 [ 10.864491] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140 [ 10.871163] [<ffffffff813e2356>] ? selinux_inode_permission+0xc6/0x180 [ 10.878809] [<ffffffff811e4342>] ? new_slab+0x2d2/0x5a0 [ 10.884995] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140 [ 10.891667] [<ffffffff811e5760>] __slab_alloc+0x20/0x40 [ 10.897853] [<ffffffff811e6b7f>] kmem_cache_alloc+0x17f/0x1c0 [ 10.904623] [<ffffffff813dd477>] avc_alloc_node+0x27/0x140 [ 10.911103] [<ffffffff813dd87a>] avc_compute_av+0x8a/0x1e0 [ 10.917582] [<ffffffff8121000a>] ? sget_userns+0x4ca/0x4e0 [ 10.924061] [<ffffffff813de596>] avc_has_perm+0x136/0x190 [ 10.930443] [<ffffffff810a4a69>] ? __might_sleep+0x49/0x80 [ 10.936924] [<ffffffff813e0000>] ? inode_doinit_with_dentry+0x530/0x660 [ 10.944666] [<ffffffff813f4c5d>] ? security_transition_sid+0x2d/0x40 [ 10.952120] [<ffffffff813e1379>] may_create+0xb9/0xe0 [ 10.958112] [<ffffffff813e13e2>] selinux_inode_mknod+0x42/0x80 [ 10.964979] [<ffffffff813da552>] security_inode_mknod+0x52/0x80 [ 10.971944] [<ffffffff812197e1>] vfs_mknod+0x131/0x1e0 [ 10.978033] [<ffffffff815b2e65>] handle_create+0x75/0x1e0 To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Xiaolong

3 years, 11 months

3
5
0 / 0

[lkp] [x86, paravirt] fd6f48529f: aim7.jobs-per-min -26.1% regression

by kernel test robot

Greeting, FYI, we noticed a -26.1% regression of aim7.jobs-per-min due to commit: commit: fd6f48529f4067c6bfbead88d3d7d117d51150f6 ("x86,paravirt: Optimize native pv_lock_ops.vcpu_is_preempted") https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/core in testcase: aim7 on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 4 -m 5G with following parameters: test: link_test load: 2000 test-description: AIM7 is a traditional UNIX system level benchmark suite which is used to test and measure the performance of multiuser system. test-url: https://sourceforge.net/projects/aimbench/files/aim-suite7/ Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email testcase/path_params/tbox_group/run: aim7/link_test-2000/vm-lkp-a05 8ba24710fb279053 fd6f48529f4067c6bfbead88d3 ---------------- -------------------------- %stddev change %stddev \ | \ 9147 ± 3% -26% 6763 ± 3% aim7.jobs-per-min 560854 59% 891815 ± 9% aim7.time.voluntary_context_switches 1329 ± 3% 35% 1792 ± 3% aim7.time.elapsed_time 1329 ± 3% 35% 1792 ± 3% aim7.time.elapsed_time.max 2594 ± 4% 29% 3349 ± 3% aim7.time.user_time 1625 12% 1821 ± 4% aim7.time.system_time 3189 -6% 2988 vmstat.system.cs 5534 -6% 5183 vmstat.system.in 12154 ±118% -1e+04 1682 ± 40% latency_stats.avg.call_rwsem_down_write_failed.copy_process._do_fork.SyS_clone.do_syscall_64.return_from_SYSCALL_64 14029 ± 12% -1e+04 390 ± 59% latency_stats.avg.pipe_read.__vfs_read.vfs_read.SyS_read.entry_SYSCALL_64_fastpath 17531 ± 84% -2e+04 2189 ± 77% latency_stats.avg.call_rwsem_down_write_failed.__vma_adjust.__split_vma.split_vma.mprotect_fixup.do_mprotect_pkey.SyS_mprotect.entry_SYSCALL_64_fastpath 20760 ± 84% -2e+04 2731 ± 89% latency_stats.avg.call_rwsem_down_write_failed.unlink_file_vma.free_pgtables.exit_mmap.mmput.flush_old_exec.load_elf_binary.search_binary_handler.do_execveat_common.SyS_execve.do_syscall_64.return_from_SYSCALL_64 143117 ±123% -1e+05 11061 ±173% latency_stats.avg.nfs_wait_on_request.nfs_writepage_setup.nfs_updatepage.nfs_write_end.generic_perform_write.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath 92032 ± 22% 2e+05 258628 ±138% latency_stats.max.pipe_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath 8848 ± 91% -8e+03 931 ± 84% latency_stats.max.rpc_wait_bit_killable.__rpc_execute.rpc_execute.rpc_run_task.nfs4_call_sync_sequence.[nfsv4]._nfs4_proc_getattr.[nfsv4].nfs4_proc_getattr.[nfsv4].__nfs_revalidate_inode.nfs_do_access.nfs_permission.__inode_permission.inode_permission 29448 ±156% -3e+04 379 ±113% latency_stats.max.wb_wait_for_completion.sync_inodes_sb.sync_inodes_one_sb.iterate_supers.sys_sync.entry_SYSCALL_64_fastpath 145833 ±120% -1e+05 14303 ±173% latency_stats.max.nfs_wait_on_request.nfs_writepage_setup.nfs_updatepage.nfs_write_end.generic_perform_write.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath 581560 ±137% -5e+05 80796 ± 25% latency_stats.max.pipe_wait.pipe_read.__vfs_read.vfs_read.SyS_read.entry_SYSCALL_64_fastpath 317533 ± 29% 2e+06 2166387 ± 17% latency_stats.sum.pipe_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath 30223 ±152% -3e+04 610 ±107% latency_stats.sum.wb_wait_for_completion.sync_inodes_sb.sync_inodes_one_sb.iterate_supers.sys_sync.entry_SYSCALL_64_fastpath 162947 ±103% -1e+05 22122 ±173% latency_stats.sum.nfs_wait_on_request.nfs_writepage_setup.nfs_updatepage.nfs_write_end.generic_perform_write.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath aim7.jobs-per-min 10000 ++------------------------------------------------------------------+ | *.** *.** *.** * *** * * | 9500 ** ** ** : ** : ** : * :*. : * + * : : *. | 9000 ++ ** :*. : * * **.* : * * * ** : * ** * * | :+ * ** :** : * * *| 8500 ++* * :: | | * | 8000 ++ | | | 7500 ++ | 7000 +O O O O O | | O O OO O OO OO O O OO O O | 6500 O+ OO OO O O O OOO | | O O | 6000 ++------------------------------------------------------------------+ aim7.time.elapsed_time 1900 ++----------------------------O----O---------------------------------+ | OO O OO O | 1800 O+O O OOO OO OOO OO OO | | O O O O O | 1700 +O O O O O | | | 1600 ++ | | | 1500 ++ | | * | 1400 ++* *. *. * :: *| | :+ * : *** * .* : *: * * *. ** * **** :* 1300 ** * ** ** + ** : *.**** : *. :* : * : * :+ *.* | | *** *** *** * *.** * * | 1200 ++-------------------------------------------------------------------+ aim7.time.elapsed_time.max 1900 ++----------------------------O----O---------------------------------+ | OO O OO O | 1800 O+O O OOO OO OOO OO OO | | O O O O O | 1700 +O O O O O | | | 1600 ++ | | | 1500 ++ | | * | 1400 ++* *. *. * :: *| | :+ * : *** * .* : *: * * *. ** * **** :* 1300 ** * ** ** + ** : *.**** : *. :* : * : * :+ *.* | | *** *** *** * *.** * * | 1200 ++-------------------------------------------------------------------+ aim7.time.voluntary_context_switches 1e+06 ++---------------------------O----O--------------------------------+ 950000 ++ O O O O O O OO O O | O OO OO O O O O O | 900000 ++ | 850000 ++ O O | | O O O O O | 800000 +O O O O | 750000 ++ | 700000 ++ | | | 650000 ++ | 600000 ++ | * * * ** ** * *.* * ***. * .**** 550000 +***. :* **.*** **.** **.* *** * * * .** :* .* ** ** *** | 500000 ++---*------------------------------*-*-*----*-*--*----------------+ [*] bisect-good sample [O] bisect-bad sample Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Xiaolong

4 years, 1 month

4
10
0 / 0

[lkp] [thermal/powerclamp] ec638db8cb: pm-qa.thermal_02.fail

by kernel test robot

Greeting, FYI, we noticed that pm-qa.thermal_02.fail due to commit: commit: ec638db8cb9ddd5ca08b23f2835b6c9c15eb616d ("thermal/powerclamp: add back module device table") https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master in testcase: pm-qa on test machine: 12 threads Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz with 6G memory with following parameters: test: thermal Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml testcase/path_params/tbox_group/run: pm-qa/thermal/wsm b58ec8b582471787 ec638db8cb9ddd5ca08b23f283 ---------------- -------------------------- fail:runs %reproduction fail:runs | | | :4 100% 4:4 pm-qa.thermal_02.fail 4:4 -100% :4 pm-qa.thermal_02.pass %stddev change %stddev \ | \ 1546 ± 23% 70% 2629 ± 29% pm-qa.time.involuntary_context_switches 33480 3% 34510 pm-qa.time.minor_page_faults 1:4 -25% :4 kmsg.DHCP/BOOTP:Reply_not_for_us_on_eth#,op[#]xid[#] Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Xiaolong

4 years, 1 month

1
0
0 / 0

[lkp] [sched/autogroup] 8e5bfa8c1f: [No primary change] perf-stat.cpu-migrations +102% increase

by kernel test robot

Greeting, There is no primary kpi change in this test, below is the data collected through multiple monitors running background just for your information. commie: 8e5bfa8c1f8471aa4a2d30be631ef2b50e10abaf ("sched/autogroup: Do not use autogroup->tg in zombie threads") https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master in testcase: unixbench on test machine: 8 threads Intel(R) Core(TM) i7 CPU 870 @ 2.93GHz with 6G memory with following parameters: runtime: 300s nr_task: 100% test: spawn test-description: UnixBench is the original BYTE UNIX benchmark suite aims to test performance of Unix-like system. test-url: https://github.com/kdlucas/byte-unixbench Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml testcase/path_params/tbox_group/run: unixbench/300s-100%-spawn/nhm-white 18f649ef344127ef 8e5bfa8c1f8471aa4a2d30be63 ---------------- -------------------------- %stddev change %stddev \ | \ 3494 3457 unixbench.score 4743931 ± 4% -44% 2638522 ± 3% unixbench.time.involuntary_context_switches 26162810 25837723 unixbench.time.voluntary_context_switches 2.915e+08 2.88e+08 unixbench.time.minor_page_faults 1110 -4% 1064 unixbench.time.user_time 583 -5% 552 unixbench.time.percent_of_cpu_this_job_got 820 -7% 763 unixbench.time.system_time 42920 15% 49508 interrupts.CAL:Function_call_interrupts 154558 -8% 141951 vmstat.system.cs 28865 ± 3% -26% 21339 vmstat.system.in 2169 -4% 2083 turbostat.Avg_MHz 79.61 -5% 75.90 turbostat.%Busy 209136 ±123% -2e+05 51277 ±168% latency_stats.max.wait_on_page_bit.__filemap_fdatawait_range.filemap_fdatawait_keep_errors.sync_inodes_sb.sync_inodes_one_sb.iterate_supers.sys_sync.entry_SYSCALL_64_fastpath 218916 ±114% -2e+05 60379 ±134% latency_stats.max.max 213732 ±121% -2e+05 55750 ±155% latency_stats.sum.wait_on_page_bit.__filemap_fdatawait_range.filemap_fdatawait_keep_errors.sync_inodes_sb.sync_inodes_one_sb.iterate_supers.sys_sync.entry_SYSCALL_64_fastpath 51492031 -8% 47290752 perf-stat.context-switches 3.109e+12 -4% 2.997e+12 perf-stat.iTLB-loads 3.02 8% 3.26 perf-stat.branch-miss-rate% 4134105 102% 8356281 perf-stat.cpu-migrations 2305 2256 perf-stat.instructions-per-iTLB-miss 0.04 0.04 perf-stat.iTLB-load-miss-rate% 1.749e+10 4% 1.826e+10 perf-stat.branch-misses 1.322e+12 1.286e+12 perf-stat.dTLB-loads 5.802e+11 -3% 5.607e+11 perf-stat.branch-instructions 3.108e+12 -4% 2.996e+12 perf-stat.instructions 7.711e+11 -4% 7.414e+11 perf-stat.dTLB-stores 2.919e+08 2.883e+08 perf-stat.page-faults 2.919e+08 2.883e+08 perf-stat.minor-faults 5.687e+12 -4% 5.464e+12 perf-stat.cpu-cycles 1.348e+09 1.328e+09 perf-stat.iTLB-load-misses 6.29 -22% 4.92 perf-stat.cache-miss-rate% 5.619e+09 -22% 4.384e+09 perf-stat.cache-misses 7.872e+08 -17% 6.499e+08 perf-stat.node-loads 4.755e+09 -22% 3.686e+09 perf-stat.node-stores perf-stat.cpu-cycles 6e+12 ++------------------------------------------------------------------+ O OO.O.O.OO.O.O.OO.O O OO.O.O.OO.O.O.* *.*.**.*.*.**.*.*.**.*.*.**.* 5e+12 ++: : : : : | | : : : : : | | : : : : : | 4e+12 ++ : : : : | |: : : : : | 3e+12 ++ : : : : | |: : : :: | 2e+12 ++ : : :: | |: : : :: | | : : | 1e+12 ++ : : | | : : | 0 *+-------------------*----------------*-----------------------------+ perf-stat.instructions 3.5e+12 ++----------------------------------------------------------------+ | * *. *. | 3e+12 O+OO.O.OO.O.O.OO.O.OO O OO.O.OO.O.O.* : **.*.**.*.**.*.*.**.*.**.* | : : : : : | 2.5e+12 ++: : : : : | |: : : : : | 2e+12 ++ : : : : | |: : : : : | 1.5e+12 ++ :: :: | |: :: :: | 1e+12 ++ :: :: | | : : | 5e+11 ++ : : | | : : | 0 *+------------------*----------------*----------------------------+ perf-stat.cache-misses 6e+09 ++------------------------------------------------------------------+ | **.*.*.**.*.*.**.* **.*.*.**.*.*.* *.*.**.*.*.**.*.*.**.*.*.**.* 5e+09 ++: : : : : | | : : : : : | O OO O O OO O O OO O O OO O O OO O O : : | 4e+09 ++ : : : : | |: : : : : | 3e+09 ++ : : : : | |: : : :: | 2e+09 ++ : : :: | |: : : :: | | : : | 1e+09 ++ : : | | : : | 0 *+-------------------*----------------*-----------------------------+ perf-stat.branch-instructions 6e+11 ++*--*-*--*-*-*-**-*---*--*-*--*-*-*-*--*---**---*-**-*-*-**-*-*-**-* O OO O O OO O O OO O O OO O O OO O O : : * * | 5e+11 ++: : : : : | | : : : : : | |: : : : : | 4e+11 ++ : : : : | |: : : : : | 3e+11 ++ : : :: | |: : : :: | 2e+11 ++ : : :: | |: : : :: | | : : | 1e+11 ++ : : | | : : | 0 *+-------------------*----------------*-----------------------------+ perf-stat.branch-misses 2e+10 ++----------------------------------------------------------------+ 1.8e+10 O+OO O OO O O OO O OO O OO O OO O O | | **.*.**.*.*.**.*.* *.**.*.**.*.*.* *.**.*.**.*.**.*.*.**.*.**.* 1.6e+10 ++: : : : : | 1.4e+10 ++: : : : : | | : : : : : | 1.2e+10 ++ : : : : | 1e+10 ++ : : : : | 8e+09 ++ :: :: | |: :: :: | 6e+09 ++ :: :: | 4e+09 ++ :: :: | | : : | 2e+09 ++ : : | 0 *+------------------*----------------*----------------------------+ perf-stat.dTLB-loads 1.4e+12 ++----------------------------------------------------------------+ O OO.O.OO.O.O.OO.O.OO O.OO.O.OO.O.O.* *.**.*.**.*.**.*.*.**.*.**.* 1.2e+12 ++: : : : : | | : : : : : | 1e+12 ++: : : : : | |: : : : : | 8e+11 ++ : : : : | |: : : : : | 6e+11 ++ :: :: | |: :: :: | 4e+11 ++ :: :: | | : : | 2e+11 ++ : : | | : : | 0 *+------------------*----------------*----------------------------+ perf-stat.dTLB-stores 8e+11 ++-----*--*-*---------------*--*-*-----------*---*-*------*--*----*-* O OO.O O OO O O.OO.O O OO.O O OO O O.* *.*.* * *.*.* * *.* | 7e+11 ++: : : : : | 6e+11 ++: : : : : | | : : : : : | 5e+11 ++ : : : : | |: : : : : | 4e+11 ++ : : : : | |: : : :: | 3e+11 ++ : : :: | 2e+11 ++ : : :: | | : : | 1e+11 ++ : : | | : : | 0 *+-------------------*----------------*-----------------------------+ perf-stat.iTLB-loads 3.5e+12 ++----------------------------------------------------------------+ | | 3e+12 O+OO.O.OO.O.O.OO.O.OO O.OO.O.OO.O.O.* *.**.*.**.*.**.*.*.**.*.**.* | : : : : : | 2.5e+12 ++: : : : : | | : : : : : | 2e+12 ++ : : : : | |: : : : : | 1.5e+12 ++ :: :: | |: :: :: | 1e+12 ++ :: :: | |: :: :: | 5e+11 ++ : : | | : : | 0 *+------------------*----------------*----------------------------+ perf-stat.node-loads 8e+08 ++**-*-*-**-*-*-**-*---**-*-*-**-*-*-*--*-*-**-*-*-**-*-*-**-*-*-**-* | : : : : : | 7e+08 ++: : : : : | 6e+08 O+OO O O OO O O OO O O OO O O OO O O : : | |: : : : : | 5e+08 ++ : : : : | |: : : : : | 4e+08 ++ : : :: | |: : : :: | 3e+08 ++ : : :: | 2e+08 ++ : : :: | | : : | 1e+08 ++ : : | | : : | 0 *+-------------------*----------------*-----------------------------+ perf-stat.node-stores 5e+09 ++--------*-------------------*----------------*--------*---------+ 4.5e+09 ++**.*.* + *.**.*.* *.**.*. : *.*.* *.**.*. : *.**.* **.*.**.* | : * : : * : : * | 4e+09 ++: O : : : : | 3.5e+09 O+OO OO O O OO O OO O OO O OO O O : : | |: : : : : | 3e+09 ++ : : : : | 2.5e+09 ++ : : : : | 2e+09 ++ :: :: | |: :: :: | 1.5e+09 ++ :: :: | 1e+09 ++ : : | | : : | 5e+08 ++ : : | 0 *+------------------*----------------*----------------------------+ perf-stat.context-switches 6e+07 ++------------------------------------------------------------------+ | | 5e+07 ++**.*.*.**.*.*.**.* **.*.*.**.*.*.* *.*.**.*.*.**.*.*.**.*.*.**.* O OO O O OO O O OO O O OO O O OO O O : : | | : : : : : | 4e+07 ++: : : : : | |: : : : : | 3e+07 ++ : : : : | |: : : :: | 2e+07 ++ : : :: | |: : : :: | |: :: :: | 1e+07 ++ : : | | : : | 0 *+-------------------*----------------*-----------------------------+ perf-stat.cpu-migrations 9e+06 ++------------------------------------------------------------------+ O OO O O OO O O OO O O OO O O OO O O | 8e+06 ++ | 7e+06 ++ | | | 6e+06 ++ | 5e+06 ++ | | | 4e+06 ++**.*.*.**.*.*.**.* **.*.*.**.*.*.* *.*.**.*.*.**.*.*.**.*.*.**.* 3e+06 ++: : : : : | |: : : : : | 2e+06 ++ : : :: | 1e+06 ++ : : :: | | : : | 0 *+-------------------*----------------*-----------------------------+ perf-stat.cache-miss-rate_ 7 ++----------------------------------------------------------------------+ | .*. *. .*.*.*.**. .*. .* .*.*.*.* .*. .*. .*.**.*. .*.*.**.*.*.* 6 ++* * * * * * * : * * * * | | : : : : : | 5 O+O O OO O O O O OO O O O O O OO O O O : : | | : : : : : | 4 ++ : : : : | |: : : : : | 3 ++ : : : : | |: : : :: | 2 ++ : : :: | |: :: : | 1 ++ : : | | : : | 0 *+--------------------*------------------*------------------------------+ perf-stat.branch-miss-rate_ 3.5 ++--------------------------------------------------------------------+ O O OO O O O OO O O O OO O O O OO O O | 3 ++*.**.*.*.*.**.*.*.* *.*.*.*.**.*.*.* *.*.*.**.*.*.*.**.*.*.*.**.*.* | : : : : : | 2.5 ++: : : : : | | : : : : : | 2 ++ : : : : | |: : : : : | 1.5 ++ : : :: | |: :: :: | 1 ++ :: :: | |: : :: | 0.5 ++ : : | | : : | 0 *+--------------------*----------------*------------------------------+ perf-stat.iTLB-load-miss-rate_ 0.045 O+OO-O-O-OO-O-O-OO-O-O-OO-O-O-OO-O-O----*----*------*-----*------**-+ | :*.* **.* **.* :*.* **.* * : *.* *.*.* *.* *.*.* * 0.04 ++: : : : : | 0.035 ++: : : : : | |: : : : : | 0.03 ++ : : : : | 0.025 ++ : : : : | |: : : : : | 0.02 ++ : : :: | 0.015 ++ : : :: | |: : : :: | 0.01 ++ : : | 0.005 ++ : : | | : : | 0 *+-------------------*----------------*-----------------------------+ perf-stat.instructions-per-iTLB-miss 2500 ++-------------------------------------------------------------------+ O O.OO.O.O.OO.O.O.OO O O.O.OO.O.O.OO.* **.*.*.*.**.*.*.**.*.*.**.*.* | : : : : : | 2000 ++: : : : : | | : : : : : | |: : : : : | 1500 ++ : : : : | |: : : : : | 1000 ++ : : : : | |: : : : : | |: : : : : | 500 ++ : : | | : : | | : : | 0 *+-------------------*-----------------*-----------------------------+ turbostat.Avg_MHz 2500 ++-------------------------------------------------------------------+ | | O O.OO.O.O.OO.O.O.OO O O.O.OO.O.O.OO.* **.*.*.*.**.*.*.**.*.*.**.*.* 2000 ++: : : : : | | : : : : : | | : : : : : | 1500 ++ : : : : | |: : : : : | 1000 ++ : : : : | |: : : : : | |: : : : : | 500 ++ :: :: | | : : | | : : | 0 *+-------------------*-----------------*-----------------------------+ turbostat._Busy 80 ++*-**-*-*-*-*-**-*-*---**-*-*-*-*-**-*---*-*-**-*-*-*-**-*-*-*-*-**-*-* O O OO O O O O OO O O O OO O O O O OO : : | 70 ++: : : : : | 60 ++: : : : : | |: : : : : | 50 ++ : : : : | |: : : : : | 40 ++ : : : : | |: : : : : | 30 ++ : : : : | 20 ++ : : : : | | : : | 10 ++ : : | | : : | 0 *+--------------------*-----------------*------------------------------+ interrupts.CAL:Function_call_interrupts 60000 ++------------------------------------------------------------------+ | | 50000 O+ O O O O O O O O O | | O O OO O OO O O O O | | **.*.*.**.*.*.**.* **.*.*.**.*.*.* *.*.**.*.*.**.*.*.**.*.*.**.* 40000 ++: : : : : | | : : : : : | 30000 ++ : : : : | |: : : : : | 20000 ++ : : :: | |: : : :: | |: : : :: | 10000 ++ : : | | : : | 0 *+-------------------*----------------*-----------------------------+ unixbench.time.user_time 1200 ++-------------------------------------------------------------------+ | *.**.*.*.**.*.*.** *.*.**.*.*.**.* **.*.*.*.**.*.*.**.*.*.**.*.* 1000 O+O OO O O OO O O OO O O O OO O O OO : : | | : : : : : | | : : : : : | 800 ++ : : : : | |: : : : : | 600 ++ : : : : | |: : : : : | 400 ++ : : : : | |: : : : : | | : : | 200 ++ : : | | : : | 0 *+-------------------*-----------------*-----------------------------+ unixbench.time.system_time 900 ++--------------------------------------------------------------------+ | *.**.*.*.*.**.*.*.* *.*.*.*.**.*.*.* *.*.*.**.*.*.*.**.*.*.*.**.*.* 800 O+O OO O O O OO O O O OO O O O OO O O : : | 700 ++: : : : : | | : : : : : | 600 ++ : : : : | 500 ++ : : : : | |: : : : : | 400 ++ :: :: | 300 ++ :: :: | |: :: :: | 200 ++ : : | 100 ++ : : | | : : | 0 *+--------------------*----------------*------------------------------+ unixbench.time.percent_of_cpu_this_job_got 600 ++*-**-*-*-*-**-*-*-*--*-*-*-*-**-*-*-*--*-*-*-**-*-*-*-**-*-*-*-**-*-* O O OO O O O OO O O O OO O O O OO O O : : | 500 ++: : : : : | | : : : : : | |: : : : : | 400 ++ : : : : | |: : : : : | 300 ++ : : :: | |: :: :: | 200 ++ :: :: | |: :: :: | | : : | 100 ++ : : | | : : | 0 *+--------------------*----------------*------------------------------+ unixbench.time.involuntary_context_switches 5e+06 ++------------*-------------------*----------------*----*-*-----*-* 4.5e+06 ++**. .**.*.* *.*. *.* .*.**.* * *.* .*.**.* *.* *.*.* | | : * * : * : : * | 4e+06 ++: : : : : | 3.5e+06 ++: : : : : | |: : : : : | 3e+06 ++ O O O O O OO:O O OO : : | 2.5e+06 O+O O O O O : : O O O O : : | 2e+06 ++ :: :: | |: :: :: | 1.5e+06 ++ :: :: | 1e+06 ++ : : | | : : | 500000 ++ : : | 0 *+------------------*----------------*----------------------------+ vmstat.system.in 35000 ++------------------------------------------------------------------+ | | 30000 ++ .*. .*. *. .**. *.* | **.*.*.**.* **.* **.*.*.**.* * *.*.**.*.*.* *.* *.*.* | 25000 ++: : : : : | O :O OO O O O O OO OO : : | 20000 ++O O O OO : : O O O O : : | |: : : : : | 15000 ++ : : : : | |: : : :: | 10000 ++ : : :: | |: : : :: | 5000 ++ : : | | : : | 0 *+-------------------*----------------*-----------------------------+ vmstat.system.cs 160000 ++------------*-------------------*-----------------*----**------*-* | **.*.*.OO.O O*.*.* OO.*.**.O.*.* * **.*.**.*.* *.* *.*.* | 140000 O+OO O O O O O : O OO O OO : : | 120000 ++: : : : : | | : : : : : | 100000 ++ : : : : | |: : : : : | 80000 ++ : : : : | |: :: : : | 60000 ++ :: : : | 40000 ++ :: : : | | : : | 20000 ++ : : | | : : | 0 *+-------------------*----------------*----------------------------+ [*] bisect-good sample [O] bisect-bad sample Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Xiaolong

4 years, 1 month

1
0
0 / 0

[lkp] [mm] 47c2d84f2d: [No primary change] interrupts.CAL:Function_call_interrupts -64% decrease

by kernel test robot

Greeting, There is no primary kpi change in this test, below is the data collected through multiple monitors running background just for your information. commit: 47c2d84f2dc7d29d10713beef3ec1239ec60f883 ("mm: remove the page size change check in tlb_remove_page") https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master in testcase: pbzip2 on test machine: 48 threads 2 sockets Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz with 64G memory with following parameters: nr_threads: 25% blocksize: 900K cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml testcase/path_params/tbox_group/run: pbzip2/25%-900K-performance/ivb42 7a8e9a729179b749 47c2d84f2dc7d29d10713beef3 ---------------- -------------------------- %stddev change %stddev \ | \ 2249503 -64% 812158 interrupts.CAL:Function_call_interrupts 1778 ± 4% 8% 1925 vmstat.system.cs 57359 -8% 52680 vmstat.system.in 530318 ± 4% 9% 575717 perf-stat.context-switches 4.804e+09 4.746e+09 perf-stat.node-stores 60.89 60.12 perf-stat.iTLB-load-miss-rate% 86802648 85115436 perf-stat.iTLB-loads 1.351e+08 -5% 1.283e+08 perf-stat.iTLB-load-misses 0.04 -7% 0.04 perf-stat.dTLB-store-miss-rate% 7.374e+08 -21% 5.844e+08 ± 3% perf-stat.dTLB-load-misses interrupts.CAL:Function_call_interrupts 2.4e+06 ++----------------------------------------------------------------+ ** **.** *.* * *** *.** *****. **** .** **** * ** **.****| 2.2e+06 ++* ***** * * * * * *** * **.* * * * 2e+06 ++ | | | 1.8e+06 ++ | 1.6e+06 ++ | | | 1.4e+06 ++ | 1.2e+06 ++ | | | 1e+06 ++ | 800000 ++ OO OOOOOO OO OO | OOO OO O | 600000 ++----------------------------------------------------------------+ vmstat.system.in 58000 ++------------------------------------------------------------------+ * *. ** .* ** * ** * ** * * ** * * * *.** * 57000 +** ** ** ** **.*** :*.* ** *.* ** *.* ** *.* ** :+ ** * *| | * * * | 56000 ++ | | | 55000 ++ | | | 54000 ++ | | | 53000 ++ O O O O O | | O OO O O O O O | 52000 OOO OO | | | 51000 ++------------------------------------------------------------------+ [*] bisect-good sample [O] bisect-bad sample Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Xiaolong

4 years, 1 month

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[lkp] [x86/tsc] 8b223bc7ab: BUG:unable_to_handle_kernel

by kernel test robot

FYI, we noticed the following commit: commit: 8b223bc7abe0e30e8d297a24ee6c6c07ef8d0bb9 ("x86/tsc: Store and check TSC ADJUST MSR") https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/timers in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 1G caused below changes: +------------------------------------------------------------------+------------+------------+ | | bec8520dca | 8b223bc7ab | +------------------------------------------------------------------+------------+------------+ | boot_successes | 2 | 0 | | boot_failures | 4 | 4 | | WARNING:at_fs/sysfs/dir.c:#sysfs_warn_dup | 1 | | | calltrace:parport_pc_init | 1 | | | calltrace:SyS_finit_module | 1 | | | WARNING:at_lib/kobject.c:#kobject_add_internal | 1 | | | BUG:kernel_reboot-without-warning_in_test_stage | 1 | | | invoked_oom-killer:gfp_mask=0x | 2 | | | Mem-Info | 2 | | | Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 2 | | | BUG:unable_to_handle_kernel | 0 | 4 | | Oops | 0 | 4 | | RIP:_find_next_bit | 0 | 4 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 4 | +------------------------------------------------------------------+------------+------------+ [ 0.000000] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns [ 0.000000] hpet clockevent registered [ 0.000000] tsc: Detected 2593.992 MHz processor [ 0.000000] BUG: unable to handle kernel NULL pointer dereference at (null) [ 0.000000] IP: [<ffffffff8147c1a5>] _find_next_bit+0x15/0x70 [ 0.000000] PGD 0 [ 0.000000] [ 0.000000] Oops: 0000 [#1] SMP [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.0-rc5-00008-g8b223bc #1 [ 0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 0.000000] task: ffffffff81e0e4c0 task.stack: ffffffff81e00000 [ 0.000000] RIP: 0010:[<ffffffff8147c1a5>] [<ffffffff8147c1a5>] _find_next_bit+0x15/0x70 [ 0.000000] RSP: 0000:ffffffff81e03eb0 EFLAGS: 00010246 [ 0.000000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 0.000000] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 0.000000] RBP: ffffffff81e03ec0 R08: ffffffffffffffff R09: 0000000000000000 [ 0.000000] R10: 0000000000000020 R11: 000000000013ca64 R12: 0000000000000000 [ 0.000000] R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000008e [ 0.000000] FS: 0000000000000000(0000) GS:ffff880029a00000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.000000] CR2: 0000000000000000 CR3: 0000000001e07000 CR4: 00000000000406b0 [ 0.000000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.000000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 0.000000] Stack: [ 0.000000] ffffffff81e03ec0 ffffffff8147c218 ffffffff81e03ee0 ffffffff81465a46 [ 0.000000] ffff880029a0d580 000000000000d580 ffffffff81e03f18 ffffffff81053005 [ 0.000000] 0000000000000002 0000000000016a00 ffffffff820b4920 ffffffff820c12e0 [ 0.000000] Call Trace: [ 0.000000] [<ffffffff8147c218>] ? find_next_bit+0x18/0x20 [ 0.000000] [<ffffffff81465a46>] cpumask_any_but+0x26/0x50 [ 0.000000] [<ffffffff81053005>] tsc_store_and_check_tsc_adjust+0x75/0x120 [ 0.000000] [<ffffffff8200a518>] tsc_init+0x19f/0x24d [ 0.000000] [<ffffffff82006df7>] x86_late_time_init+0xf/0x11 [ 0.000000] [<ffffffff81ffbeb0>] start_kernel+0x35b/0x414 [ 0.000000] [<ffffffff81ffb120>] ? early_idt_handler_array+0x120/0x120 [ 0.000000] [<ffffffff81ffb2d6>] x86_64_start_reservations+0x2a/0x2c [ 0.000000] [<ffffffff81ffb415>] x86_64_start_kernel+0x13d/0x14c [ 0.000000] Code: d0 48 0f 47 c2 5d c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 c8 48 89 d1 49 c7 c0 ff ff ff ff 48 c1 e9 06 49 89 c1 55 <4c> 33 0c cf 89 d1 48 83 e2 c0 49 d3 e0 48 89 e5 4c 89 c1 4c 21 [ 0.000000] RIP [<ffffffff8147c1a5>] _find_next_bit+0x15/0x70 [ 0.000000] RSP <ffffffff81e03eb0> [ 0.000000] CR2: 0000000000000000 [ 0.000000] ---[ end trace a444a5b30abeb907 ]--- [ 0.000000] Kernel panic - not syncing: Fatal exception Elapsed time: 40 To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, Xiaolong

4 years, 1 month

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[lkp] [mm] e7c1db75fe: BUG:sleeping_function_called_from_invalid_context_at_mm/page_alloc.c

by kernel test robot

FYI, we noticed the following commit: commit e7c1db75fed821a961ce1ca2b602b08e75de0cd8 ("mm: Prevent __alloc_pages_nodemask() RCU CPU stall warnings") https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu Nehalem -smp 2 -m 1G caused below changes: +----------------------------------------------------------------------+------------+------------+ | | 7cebc6b63b | e7c1db75fe | +----------------------------------------------------------------------+------------+------------+ | boot_successes | 0 | 0 | | boot_failures | 14 | 14 | | invoked_oom-killer:gfp_mask=0x | 2 | | | Mem-Info | 2 | | | Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 2 | | | BUG:sleeping_function_called_from_invalid_context_at_mm/swap.c | 12 | 14 | | calltrace:run_init_process | 12 | 14 | | calltrace:SyS_execve | 7 | 5 | | calltrace:SyS_exit_group | 12 | 13 | | calltrace:SyS_read | 1 | | | WARNING:at_fs/sysfs/dir.c:#sysfs_warn_dup | 2 | 1 | | calltrace:parport_pc_init | 2 | 1 | | calltrace:SyS_finit_module | 2 | 1 | | WARNING:at_lib/kobject.c:#kobject_add_internal | 2 | 1 | | calltrace:SyS_munmap | 2 | | | BUG:sleeping_function_called_from_invalid_context_at_mm/page_alloc.c | 0 | 8 | | calltrace:SyS_clone | 0 | 1 | +----------------------------------------------------------------------+------------+------------+ [ 8.953192] BUG: sleeping function called from invalid context at mm/page_alloc.c:3746 [ 8.956353] in_atomic(): 1, irqs_disabled(): 1, pid: 0, name: swapper/0 [ 8.958262] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.9.0-rc1-00048-ge7c1db7 #1 [ 8.961309] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 8.964341] ffff880029a03720 ffffffff81472549 ffffffff81e0d4c0 0000000002281220 [ 8.967460] ffff880029a03738 ffffffff810a8583 ffff8800364be080 ffff880029a037c0 [ 8.970582] ffffffff81190be5 ffffffff81e0d4c0 ffffffff81e0d4c0 ffffffff81e0d4c0 [ 8.973694] Call Trace: [ 8.974871] <IRQ> [ 8.975317] [<ffffffff81472549>] dump_stack+0x63/0x8a [ 8.977116] [<ffffffff810a8583>] ___might_sleep+0xd3/0x120 [ 8.978852] [<ffffffff81190be5>] __alloc_pages_nodemask+0xd5/0x2f0 [ 8.980663] [<ffffffff811e5335>] alloc_pages_current+0x95/0x140 [ 8.982401] [<ffffffff811efd70>] new_slab+0x3c0/0x5a0 [ 8.984001] [<ffffffff811f1b4c>] ? kfree+0x15c/0x170 [ 8.985648] [<ffffffff811f1110>] ___slab_alloc+0x3a0/0x4b0 [ 8.987316] [<ffffffff818734a1>] ? inet_twsk_alloc+0x41/0x160 [ 8.989031] [<ffffffff818734a1>] ? inet_twsk_alloc+0x41/0x160 [ 8.990743] [<ffffffff811f1240>] __slab_alloc+0x20/0x40 [ 8.992365] [<ffffffff811f264f>] kmem_cache_alloc+0x17f/0x1c0 [ 8.994079] [<ffffffff818734a1>] inet_twsk_alloc+0x41/0x160 [ 8.995763] [<ffffffff8189103e>] tcp_time_wait+0x4e/0x290 [ 8.997414] [<ffffffff81884dbb>] tcp_rcv_state_process+0xd6b/0xd70 [ 8.999199] [<ffffffff813fd0fb>] ? security_sock_rcv_skb+0x3b/0x50 [ 9.000989] [<ffffffff8188e532>] tcp_v4_do_rcv+0xb2/0x200 [ 9.002649] [<ffffffff8188fde0>] tcp_v4_rcv+0x910/0xa10 [ 9.004270] [<ffffffff81905000>] ? ipv6_chk_mcast_addr+0x120/0x140 [ 9.006068] [<ffffffff818e03a8>] ? ip6_input_finish+0xf8/0x460 [ 9.007792] [<ffffffff81868a71>] ip_local_deliver_finish+0xa1/0x1d0 [ 9.009590] [<ffffffff81868d50>] ip_local_deliver+0x60/0xe0 [ 9.011266] [<ffffffff8188f4ba>] ? tcp_v4_early_demux+0x13a/0x150 [ 9.013038] [<ffffffff818686fd>] ip_rcv_finish+0xdd/0x3b0 [ 9.014693] [<ffffffff81869033>] ip_rcv+0x263/0x390 [ 9.016257] [<ffffffff81664fe0>] ? e1000_intr+0xa0/0x120 [ 9.017904] [<ffffffff81824993>] __netif_receive_skb_core+0x513/0xa60 [ 9.019733] [<ffffffff8105a52b>] ? native_apic_msr_write+0x2b/0x30 [ 9.021513] [<ffffffff8189521c>] ? tcp4_gro_receive+0x11c/0x1c0 [ 9.023267] [<ffffffff81824ef8>] __netif_receive_skb+0x18/0x60 [ 9.024998] [<ffffffff81824f78>] netif_receive_skb_internal+0x38/0xb0 [ 9.026822] [<ffffffff81826054>] napi_gro_receive+0xd4/0x130 [ 9.028514] [<ffffffff816679aa>] e1000_clean_rx_irq+0x19a/0x510 [ 9.030252] [<ffffffff81666e00>] e1000_clean+0x260/0x8c0 [ 9.031892] [<ffffffff810b7798>] ? account_entity_enqueue+0xd8/0x100 [ 9.033707] [<ffffffff818257f9>] net_rx_action+0x229/0x390 [ 9.035367] [<ffffffff81971934>] __do_softirq+0x104/0x2ab [ 9.037032] [<ffffffff81086bf1>] irq_exit+0xf1/0x100 [ 9.038616] [<ffffffff81971674>] do_IRQ+0x54/0xd0 [ 9.040149] [<ffffffff8196f50c>] common_interrupt+0x8c/0x8c [ 9.041828] <EOI> [ 9.042256] [<ffffffff8196e2e6>] ? native_safe_halt+0x6/0x10 [ 9.044674] [<ffffffff8196dfe0>] default_idle+0x20/0xf0 [ 9.046295] [<ffffffff81038d1f>] arch_cpu_idle+0xf/0x20 [ 9.047923] [<ffffffff8196e453>] default_idle_call+0x23/0x30 [ 9.049628] [<ffffffff810c75d9>] cpu_startup_entry+0x189/0x200 [ 9.051355] [<ffffffff81960785>] rest_init+0x85/0x90 [ 9.053096] [<ffffffff81ffaf7a>] start_kernel+0x407/0x414 [ 9.054860] [<ffffffff81ffa120>] ? early_idt_handler_array+0x120/0x120 [ 9.056765] [<ffffffff81ffa2d6>] x86_64_start_reservations+0x2a/0x2c [ 9.058658] [<ffffffff81ffa415>] x86_64_start_kernel+0x13d/0x14c To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, Xiaolong

4 years, 1 month

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[lkp] [mm] 79404c5a5c: netperf.Throughput_Mbps +23.0% improvement

by kernel test robot

Greeting, FYI, we noticed a +23.0% improvement of netperf.Throughput_Mbps due to commit: commit 79404c5a5c66481aa55c0cae685e49e0f44a0479 ("mm: page_alloc: High-order per-cpu page allocator") https://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git mm-pagealloc-highorder-percpu-v3r1 +------------------+-----------------------------------------------------------------+ | testcase: change | netperf: netperf.Throughput_Mbps 23.0% improvement | | test machine | 8 threads Intel(R) Atom(TM) CPU C2750 @ 2.40GHz with 16G memory | | test parameters | cluster=cs-localhost | | | cpufreq_governor=performance | | | ip=ipv4 | | | nr_threads=25% | | | runtime=300s | | | send_size=10K | | | test=SCTP_STREAM_MANY | +------------------+-----------------------------------------------------------------+ test-description: The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us. test-url: https://git.kernel.org/cgit/linux/kernel/git/wfg/vm-scalability.git/ In addition to that, the commit also has significant impact on the following tests: Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml *************************************************************************************************** lkp-avoton3: 8 threads Intel(R) Atom(TM) CPU C2750 @ 2.40GHz with 16G memory ========================================================================================= cluster/compiler/cpufreq_governor/ip/kconfig/nr_threads/rootfs/runtime/send_size/tbox_group/test/testcase: cs-localhost/gcc-6/performance/ipv4/x86_64-rhel-7.2/25%/debian-x86_64-2016-08-31.cgz/300s/10K/lkp-avoton3/SCTP_STREAM_MANY/netperf commit: v4.9-rc5 79404c5a5c ("mm: page_alloc: High-order per-cpu page allocator") v4.9-rc5 79404c5a5c66481aa55c0cae68 ---------------- -------------------------- fail:runs %reproduction fail:runs | | | %stddev %change %stddev \ | \ 4124 ± 6% +23.0% 5074 ± 1% netperf.Throughput_Mbps 165.20 ± 5% +8.2% 178.75 ± 1% netperf.time.percent_of_cpu_this_job_got 490.26 ± 5% +8.0% 529.39 ± 0% netperf.time.system_time 56253 ± 8% +20.0% 67530 ± 12% meminfo.DirectMap4k 4332800 ± 6% +22.8% 5319765 ± 1% softirqs.NET_RX 57290 ± 6% +22.7% 70278 ± 1% vmstat.system.cs 8725309 ± 7% +23.5% 10773756 ± 1% cpuidle.C1-AVN.usage 18968 ± 6% +22.3% 23200 ± 1% cpuidle.POLL.usage 323.15 ± 0% -100.0% 0.00 ± -1% uptime.boot 1899 ± 1% -100.0% 0.00 ± -1% uptime.idle 31.90 ± 5% +10.7% 35.31 ± 0% turbostat.%Busy 817.80 ± 7% +12.3% 918.25 ± 0% turbostat.Avg_MHz 38.00 ± 8% +20.4% 45.75 ± 3% turbostat.CoreTmp 39068988 ± 6% +22.9% 48019605 ± 1% proc-vmstat.numa_hit 39068960 ± 6% +22.9% 48019576 ± 1% proc-vmstat.numa_local 2.243e+08 ± 6% +23.1% 2.761e+08 ± 1% proc-vmstat.pgalloc_normal 2.243e+08 ± 6% -43.1% 1.276e+08 ± 1% proc-vmstat.pgfree 87247 ± 7% +11.9% 97636 ± 0% sched_debug.cfs_rq:/.min_vruntime.avg 46310 ± 11% +50.1% 69504 ± 2% sched_debug.cfs_rq:/.min_vruntime.min 1.47 ± 9% -18.8% 1.19 ± 16% sched_debug.cpu.clock.stddev 1.47 ± 9% -18.9% 1.19 ± 16% sched_debug.cpu.clock_task.stddev 55358 ± 9% +30.4% 72172 ± 3% sched_debug.cpu.nr_load_updates.min 12494 ± 9% -32.1% 8488 ± 17% sched_debug.cpu.nr_load_updates.stddev 1074035 ± 7% +23.3% 1324227 ± 0% sched_debug.cpu.nr_switches.avg 1577603 ± 10% +19.3% 1882212 ± 5% sched_debug.cpu.nr_switches.max 8.859e+10 ± 6% +17.2% 1.039e+11 ± 0% perf-stat.branch-instructions 4.18 ± 0% -4.5% 3.99 ± 0% perf-stat.branch-miss-rate% 3.699e+09 ± 5% +12.0% 4.145e+09 ± 0% perf-stat.branch-misses 1.183e+11 ± 8% +11.9% 1.324e+11 ± 0% perf-stat.cache-references 17412166 ± 6% +22.7% 21360182 ± 1% perf-stat.context-switches 1.94e+12 ± 7% +13.3% 2.198e+12 ± 0% perf-stat.cpu-cycles 18000 ± 19% -26.1% 13294 ± 2% perf-stat.cpu-migrations 0.91 ± 0% -4.2% 0.87 ± 0% perf-stat.iTLB-load-miss-rate% 4.303e+09 ± 5% +12.8% 4.853e+09 ± 1% perf-stat.iTLB-load-misses 4.698e+11 ± 6% +17.7% 5.528e+11 ± 1% perf-stat.iTLB-loads 4.609e+11 ± 5% +19.9% 5.526e+11 ± 1% perf-stat.instructions 107.14 ± 1% +6.3% 113.88 ± 0% perf-stat.instructions-per-iTLB-miss 0.24 ± 2% +5.6% 0.25 ± 0% perf-stat.ipc 7.80 ± 7% +32.7% 10.34 ± 4% perf-profile.calltrace.cycles-pp.___sys_recvmsg.__sys_recvmsg.sys_recvmsg.entry_SYSCALL_64_fastpath 2.02 ± 12% -20.0% 1.61 ± 6% perf-profile.calltrace.cycles-pp.__alloc_skb._sctp_make_chunk.sctp_make_datafrag_empty.sctp_datamsg_from_user.sctp_sendmsg 1.53 ± 14% -35.6% 0.98 ± 6% perf-profile.calltrace.cycles-pp.__kmalloc_node_track_caller.__kmalloc_reserve.__alloc_skb._sctp_make_chunk.sctp_make_datafrag_empty 1.59 ± 13% -33.2% 1.06 ± 6% perf-profile.calltrace.cycles-pp.__kmalloc_reserve.__alloc_skb._sctp_make_chunk.sctp_make_datafrag_empty.sctp_datamsg_from_user 7.17 ± 12% +29.0% 9.26 ± 4% perf-profile.calltrace.cycles-pp.__local_bh_enable_ip.ip_finish_output2.ip_finish_output.ip_output.ip_local_out 6.76 ± 12% +28.6% 8.69 ± 3% perf-profile.calltrace.cycles-pp.__netif_receive_skb.process_backlog.net_rx_action.__softirqentry_text_start.do_softirq_own_stack 6.73 ± 12% +28.3% 8.64 ± 3% perf-profile.calltrace.cycles-pp.__netif_receive_skb_core.__netif_receive_skb.process_backlog.net_rx_action.__softirqentry_text_start 8.83 ± 8% +32.2% 11.67 ± 4% perf-profile.calltrace.cycles-pp.__release_sock.release_sock.sctp_sendmsg.inet_sendmsg.sock_sendmsg 7.09 ± 12% +28.6% 9.11 ± 4% perf-profile.calltrace.cycles-pp.__softirqentry_text_start.do_softirq_own_stack.do_softirq.__local_bh_enable_ip.ip_finish_output2 7.91 ± 7% +32.8% 10.51 ± 4% perf-profile.calltrace.cycles-pp.__sys_recvmsg.sys_recvmsg.entry_SYSCALL_64_fastpath 0.70 ± 9% +123.3% 1.57 ± 4% perf-profile.calltrace.cycles-pp._raw_spin_lock_bh.lock_sock_nested.sctp_skb_recv_datagram.sctp_recvmsg.inet_recvmsg 1.14 ± 17% -22.2% 0.89 ± 3% perf-profile.calltrace.cycles-pp.consume_skb.sctp_chunk_put.sctp_chunk_free.sctp_outq_sack.sctp_cmd_interpreter 3.41 ± 16% -41.3% 2.00 ± 2% perf-profile.calltrace.cycles-pp.copy_user_enhanced_fast_string.sctp_user_addto_chunk.sctp_datamsg_from_user.sctp_sendmsg.inet_sendmsg 2.82 ± 8% +25.4% 3.54 ± 9% perf-profile.calltrace.cycles-pp.copy_user_enhanced_fast_string.skb_copy_datagram_iter.sctp_recvmsg.inet_recvmsg.sock_recvmsg 7.16 ± 12% +28.7% 9.21 ± 4% perf-profile.calltrace.cycles-pp.do_softirq.__local_bh_enable_ip.ip_finish_output2.ip_finish_output.ip_output 7.12 ± 12% +28.6% 9.16 ± 4% perf-profile.calltrace.cycles-pp.do_softirq_own_stack.do_softirq.__local_bh_enable_ip.ip_finish_output2.ip_finish_output 36.95 ± 10% +17.6% 43.43 ± 2% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_fastpath 1.00 ± 15% -59.8% 0.40 ± 58% perf-profile.calltrace.cycles-pp.get_page_from_freelist.__alloc_pages_nodemask.kmalloc_large_node.__kmalloc_node_track_caller.__kmalloc_reserve 7.28 ± 7% +33.2% 9.69 ± 4% perf-profile.calltrace.cycles-pp.inet_recvmsg.sock_recvmsg.___sys_recvmsg.__sys_recvmsg.sys_recvmsg 7.59 ± 12% +29.7% 9.85 ± 4% perf-profile.calltrace.cycles-pp.ip_finish_output.ip_output.ip_local_out.ip_queue_xmit.sctp_v4_xmit 7.55 ± 12% +29.5% 9.78 ± 4% perf-profile.calltrace.cycles-pp.ip_finish_output2.ip_finish_output.ip_output.ip_local_out.ip_queue_xmit 6.34 ± 12% +28.4% 8.14 ± 4% perf-profile.calltrace.cycles-pp.ip_local_deliver.ip_rcv_finish.ip_rcv.__netif_receive_skb_core.__netif_receive_skb 6.29 ± 12% +28.4% 8.08 ± 4% perf-profile.calltrace.cycles-pp.ip_local_deliver_finish.ip_local_deliver.ip_rcv_finish.ip_rcv.__netif_receive_skb_core 8.19 ± 14% +32.0% 10.82 ± 4% perf-profile.calltrace.cycles-pp.ip_local_out.ip_queue_xmit.sctp_v4_xmit.sctp_packet_transmit.sctp_outq_flush 7.88 ± 14% +34.6% 10.61 ± 4% perf-profile.calltrace.cycles-pp.ip_output.ip_local_out.ip_queue_xmit.sctp_v4_xmit.sctp_packet_transmit 8.48 ± 12% +29.3% 10.96 ± 4% perf-profile.calltrace.cycles-pp.ip_queue_xmit.sctp_v4_xmit.sctp_packet_transmit.sctp_outq_flush.sctp_outq_uncork 6.54 ± 12% +28.7% 8.41 ± 4% perf-profile.calltrace.cycles-pp.ip_rcv.__netif_receive_skb_core.__netif_receive_skb.process_backlog.net_rx_action 6.39 ± 12% +28.7% 8.23 ± 4% perf-profile.calltrace.cycles-pp.ip_rcv_finish.ip_rcv.__netif_receive_skb_core.__netif_receive_skb.process_backlog 1.08 ± 8% +29.2% 1.39 ± 5% perf-profile.calltrace.cycles-pp.kfree_skb.sctp_ulpevent_free.sctp_recvmsg.inet_recvmsg.sock_recvmsg 1.48 ± 14% -36.6% 0.94 ± 6% perf-profile.calltrace.cycles-pp.kmalloc_large_node.__kmalloc_node_track_caller.__kmalloc_reserve.__alloc_skb._sctp_make_chunk 0.76 ± 9% +115.4% 1.63 ± 3% perf-profile.calltrace.cycles-pp.lock_sock_nested.sctp_skb_recv_datagram.sctp_recvmsg.inet_recvmsg.sock_recvmsg 3.76 ± 6% +45.9% 5.49 ± 8% perf-profile.calltrace.cycles-pp.memcpy_erms.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm 0.70 ± 9% +123.1% 1.56 ± 4% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_bh.lock_sock_nested.sctp_skb_recv_datagram.sctp_recvmsg 6.99 ± 12% +28.3% 8.96 ± 4% perf-profile.calltrace.cycles-pp.net_rx_action.__softirqentry_text_start.do_softirq_own_stack.do_softirq.__local_bh_enable_ip 6.86 ± 12% +28.4% 8.81 ± 3% perf-profile.calltrace.cycles-pp.process_backlog.net_rx_action.__softirqentry_text_start.do_softirq_own_stack.do_softirq 8.97 ± 8% +31.6% 11.81 ± 4% perf-profile.calltrace.cycles-pp.release_sock.sctp_sendmsg.inet_sendmsg.sock_sendmsg.___sys_sendmsg 6.95 ± 7% +35.3% 9.40 ± 4% perf-profile.calltrace.cycles-pp.sctp_assoc_bh_rcv.sctp_inq_push.sctp_backlog_rcv.__release_sock.release_sock 4.80 ± 13% +25.3% 6.01 ± 4% perf-profile.calltrace.cycles-pp.sctp_assoc_bh_rcv.sctp_inq_push.sctp_rcv.ip_local_deliver_finish.ip_local_deliver 8.75 ± 8% +32.3% 11.58 ± 4% perf-profile.calltrace.cycles-pp.sctp_backlog_rcv.__release_sock.release_sock.sctp_sendmsg.inet_sendmsg 1.27 ± 16% -17.3% 1.05 ± 2% perf-profile.calltrace.cycles-pp.sctp_chunk_put.sctp_chunk_free.sctp_outq_sack.sctp_cmd_interpreter.sctp_do_sm 7.03 ± 8% +35.7% 9.53 ± 4% perf-profile.calltrace.cycles-pp.sctp_cmd_interpreter.sctp_do_sm.sctp_assoc_bh_rcv.sctp_inq_push.sctp_backlog_rcv 3.99 ± 13% +25.2% 5.00 ± 4% perf-profile.calltrace.cycles-pp.sctp_cmd_interpreter.sctp_do_sm.sctp_assoc_bh_rcv.sctp_inq_push.sctp_rcv 6.11 ± 11% +22.1% 7.46 ± 6% perf-profile.calltrace.cycles-pp.sctp_cmd_interpreter.sctp_do_sm.sctp_primitive_SEND.sctp_sendmsg.inet_sendmsg 7.09 ± 13% -21.8% 5.55 ± 5% perf-profile.calltrace.cycles-pp.sctp_datamsg_from_user.sctp_sendmsg.inet_sendmsg.sock_sendmsg.___sys_sendmsg 6.86 ± 7% +35.9% 9.31 ± 4% perf-profile.calltrace.cycles-pp.sctp_do_sm.sctp_assoc_bh_rcv.sctp_inq_push.sctp_backlog_rcv.__release_sock 4.44 ± 13% +25.1% 5.56 ± 4% perf-profile.calltrace.cycles-pp.sctp_do_sm.sctp_assoc_bh_rcv.sctp_inq_push.sctp_rcv.ip_local_deliver_finish 6.08 ± 11% +21.7% 7.40 ± 6% perf-profile.calltrace.cycles-pp.sctp_do_sm.sctp_primitive_SEND.sctp_sendmsg.inet_sendmsg.sock_sendmsg 6.94 ± 7% +35.0% 9.37 ± 4% perf-profile.calltrace.cycles-pp.sctp_inq_push.sctp_backlog_rcv.__release_sock.release_sock.sctp_sendmsg 4.90 ± 13% +25.4% 6.15 ± 4% perf-profile.calltrace.cycles-pp.sctp_inq_push.sctp_rcv.ip_local_deliver_finish.ip_local_deliver.ip_rcv_finish 7.48 ± 7% +40.6% 10.52 ± 5% perf-profile.calltrace.cycles-pp.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm.sctp_assoc_bh_rcv 7.32 ± 12% +23.7% 9.05 ± 5% perf-profile.calltrace.cycles-pp.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm.sctp_primitive_SEND 7.55 ± 7% +40.5% 10.61 ± 5% perf-profile.calltrace.cycles-pp.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm.sctp_assoc_bh_rcv.sctp_inq_push 7.42 ± 12% +23.5% 9.17 ± 5% perf-profile.calltrace.cycles-pp.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm.sctp_primitive_SEND.sctp_sendmsg 9.64 ± 11% +29.3% 12.47 ± 3% perf-profile.calltrace.cycles-pp.sctp_packet_transmit.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm 9.07 ± 12% +23.2% 11.17 ± 5% perf-profile.calltrace.cycles-pp.sctp_primitive_SEND.sctp_sendmsg.inet_sendmsg.sock_sendmsg.___sys_sendmsg 6.01 ± 12% +27.9% 7.69 ± 4% perf-profile.calltrace.cycles-pp.sctp_rcv.ip_local_deliver_finish.ip_local_deliver.ip_rcv_finish.ip_rcv 7.17 ± 7% +33.6% 9.58 ± 4% perf-profile.calltrace.cycles-pp.sctp_recvmsg.inet_recvmsg.sock_recvmsg.___sys_recvmsg.__sys_recvmsg 1.96 ± 9% +57.6% 3.08 ± 3% perf-profile.calltrace.cycles-pp.sctp_skb_recv_datagram.sctp_recvmsg.inet_recvmsg.sock_recvmsg.___sys_recvmsg 1.44 ± 8% +31.1% 1.89 ± 4% perf-profile.calltrace.cycles-pp.sctp_ulpevent_free.sctp_recvmsg.inet_recvmsg.sock_recvmsg.___sys_recvmsg 3.68 ± 15% -37.4% 2.30 ± 2% perf-profile.calltrace.cycles-pp.sctp_user_addto_chunk.sctp_datamsg_from_user.sctp_sendmsg.inet_sendmsg.sock_sendmsg 8.53 ± 12% +29.5% 11.04 ± 3% perf-profile.calltrace.cycles-pp.sctp_v4_xmit.sctp_packet_transmit.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter 3.01 ± 7% +24.6% 3.75 ± 9% perf-profile.calltrace.cycles-pp.skb_copy_datagram_iter.sctp_recvmsg.inet_recvmsg.sock_recvmsg.___sys_recvmsg 0.96 ± 17% -28.3% 0.69 ± 1% perf-profile.calltrace.cycles-pp.skb_release_all.consume_skb.sctp_chunk_put.sctp_chunk_free.sctp_outq_sack 0.86 ± 9% +28.2% 1.11 ± 5% perf-profile.calltrace.cycles-pp.skb_release_all.kfree_skb.sctp_ulpevent_free.sctp_recvmsg.inet_recvmsg 7.42 ± 7% +33.2% 9.89 ± 4% perf-profile.calltrace.cycles-pp.sock_recvmsg.___sys_recvmsg.__sys_recvmsg.sys_recvmsg.entry_SYSCALL_64_fastpath 7.92 ± 7% +32.8% 10.52 ± 4% perf-profile.calltrace.cycles-pp.sys_recvmsg.entry_SYSCALL_64_fastpath 7.80 ± 7% +32.7% 10.35 ± 4% perf-profile.children.cycles-pp.___sys_recvmsg 1.99 ± 12% -18.1% 1.63 ± 2% perf-profile.children.cycles-pp.__alloc_pages_nodemask 0.77 ± 12% +39.6% 1.07 ± 5% perf-profile.children.cycles-pp.__dev_queue_xmit 1.08 ± 16% -74.7% 0.27 ± 14% perf-profile.children.cycles-pp.__free_pages_ok 7.43 ± 12% +28.9% 9.58 ± 4% perf-profile.children.cycles-pp.__local_bh_enable_ip 6.78 ± 12% +28.5% 8.71 ± 3% perf-profile.children.cycles-pp.__netif_receive_skb 6.76 ± 12% +28.3% 8.67 ± 4% perf-profile.children.cycles-pp.__netif_receive_skb_core 8.85 ± 8% +32.0% 11.68 ± 4% perf-profile.children.cycles-pp.__release_sock 1.37 ± 16% +20.6% 1.65 ± 4% perf-profile.children.cycles-pp.__schedule 7.18 ± 12% +28.3% 9.21 ± 4% perf-profile.children.cycles-pp.__softirqentry_text_start 7.92 ± 7% +32.8% 10.51 ± 4% perf-profile.children.cycles-pp.__sys_recvmsg 0.87 ± 10% +102.3% 1.76 ± 3% perf-profile.children.cycles-pp._raw_spin_lock_bh 0.81 ± 11% +38.9% 1.12 ± 5% perf-profile.children.cycles-pp.dev_queue_xmit 7.17 ± 12% +28.8% 9.23 ± 4% perf-profile.children.cycles-pp.do_softirq 7.16 ± 12% +28.7% 9.21 ± 4% perf-profile.children.cycles-pp.do_softirq_own_stack 37.15 ± 10% +17.6% 43.68 ± 2% perf-profile.children.cycles-pp.entry_SYSCALL_64_fastpath 1.51 ± 12% -25.1% 1.13 ± 3% perf-profile.children.cycles-pp.get_page_from_freelist 7.28 ± 7% +33.2% 9.70 ± 4% perf-profile.children.cycles-pp.inet_recvmsg 7.92 ± 12% +29.6% 10.27 ± 4% perf-profile.children.cycles-pp.ip_finish_output 7.85 ± 12% +29.6% 10.17 ± 4% perf-profile.children.cycles-pp.ip_finish_output2 6.35 ± 12% +28.5% 8.16 ± 4% perf-profile.children.cycles-pp.ip_local_deliver 6.31 ± 12% +28.6% 8.11 ± 4% perf-profile.children.cycles-pp.ip_local_deliver_finish 8.40 ± 12% +29.2% 10.85 ± 4% perf-profile.children.cycles-pp.ip_local_out 8.23 ± 12% +29.1% 10.62 ± 4% perf-profile.children.cycles-pp.ip_output 8.49 ± 12% +29.3% 10.98 ± 3% perf-profile.children.cycles-pp.ip_queue_xmit 6.57 ± 12% +28.4% 8.44 ± 4% perf-profile.children.cycles-pp.ip_rcv 6.42 ± 12% +28.5% 8.25 ± 4% perf-profile.children.cycles-pp.ip_rcv_finish 1.08 ± 8% +29.2% 1.40 ± 5% perf-profile.children.cycles-pp.kfree_skb 1.00 ± 8% +90.4% 1.90 ± 3% perf-profile.children.cycles-pp.lock_sock_nested 3.92 ± 5% +43.4% 5.62 ± 7% perf-profile.children.cycles-pp.memcpy_erms 0.83 ± 11% +89.7% 1.58 ± 3% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath 7.02 ± 12% +28.2% 9.00 ± 3% perf-profile.children.cycles-pp.net_rx_action 6.88 ± 12% +28.3% 8.83 ± 3% perf-profile.children.cycles-pp.process_backlog 9.10 ± 8% +31.4% 11.95 ± 4% perf-profile.children.cycles-pp.release_sock 1.47 ± 15% +21.1% 1.78 ± 4% perf-profile.children.cycles-pp.schedule 11.77 ± 9% +31.0% 15.43 ± 4% perf-profile.children.cycles-pp.sctp_assoc_bh_rcv 8.77 ± 8% +32.2% 11.59 ± 4% perf-profile.children.cycles-pp.sctp_backlog_rcv 17.20 ± 10% +28.2% 22.05 ± 4% perf-profile.children.cycles-pp.sctp_cmd_interpreter 7.10 ± 13% -21.5% 5.57 ± 5% perf-profile.children.cycles-pp.sctp_datamsg_from_user 17.44 ± 10% +28.1% 22.33 ± 4% perf-profile.children.cycles-pp.sctp_do_sm 11.88 ± 9% +30.9% 15.54 ± 4% perf-profile.children.cycles-pp.sctp_inq_push 14.87 ± 9% +32.3% 19.66 ± 5% perf-profile.children.cycles-pp.sctp_outq_flush 15.05 ± 9% +32.1% 19.88 ± 5% perf-profile.children.cycles-pp.sctp_outq_uncork 9.66 ± 11% +29.2% 12.48 ± 3% perf-profile.children.cycles-pp.sctp_packet_transmit 9.09 ± 12% +23.2% 11.20 ± 5% perf-profile.children.cycles-pp.sctp_primitive_SEND 6.03 ± 12% +27.9% 7.71 ± 4% perf-profile.children.cycles-pp.sctp_rcv 7.17 ± 7% +33.7% 9.59 ± 4% perf-profile.children.cycles-pp.sctp_recvmsg 1.96 ± 9% +57.5% 3.09 ± 3% perf-profile.children.cycles-pp.sctp_skb_recv_datagram 1.45 ± 8% +31.1% 1.89 ± 4% perf-profile.children.cycles-pp.sctp_ulpevent_free 3.70 ± 15% -37.1% 2.33 ± 2% perf-profile.children.cycles-pp.sctp_user_addto_chunk 8.56 ± 12% +29.4% 11.07 ± 3% perf-profile.children.cycles-pp.sctp_v4_xmit 3.02 ± 7% +24.5% 3.75 ± 9% perf-profile.children.cycles-pp.skb_copy_datagram_iter 7.42 ± 7% +33.3% 9.89 ± 4% perf-profile.children.cycles-pp.sock_recvmsg 7.93 ± 7% +32.8% 10.53 ± 4% perf-profile.children.cycles-pp.sys_recvmsg 3.92 ± 5% +43.4% 5.62 ± 7% perf-profile.self.cycles-pp.memcpy_erms 0.83 ± 11% +89.7% 1.58 ± 3% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Xiaolong

4 years, 1 month

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[lkp] [sched] d455080958: [No primary change] hackbench.time.involuntary_context_switches -8.0% decrease

by kernel test robot

Greeting, There is no primary kpi change in this test, below is the data collected through multiple monitors running background just for your information. commit d4550809586dc011ef8c5a9179e6a4325e7b98e1 ("sched: look for idle cpu at wake up") https://git.linaro.org/people/vincent.guittot/kernel.git sched/pelt in testcase: hackbench on test machine: 8 threads Ivy Bridge with 16G memory with following parameters: nr_threads: 50% mode: process ipc: socket cpufreq_governor: performance test-description: Hackbench is both a benchmark and a stress test for the Linux kernel scheduler. test-url: https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/sc... Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml ========================================================================================= compiler/cpufreq_governor/ipc/kconfig/mode/nr_threads/rootfs/tbox_group/testcase: gcc-6/performance/socket/x86_64-rhel-7.2/process/50%/debian-x86_64-2016-08-31.cgz/lkp-ivb-d01/hackbench commit: fba9fb5f5f ("sched: use load_avg for selecting idlest group") d455080958 ("sched: look for idle cpu at wake up") fba9fb5f5f79866e d4550809586dc011ef8c5a9179 ---------------- -------------------------- %stddev %change %stddev \ | \ 34162896 ± 1% -8.0% 31437510 ± 1% hackbench.time.involuntary_context_switches 733.00 ± 0% +1.3% 742.25 ± 0% hackbench.time.percent_of_cpu_this_job_got 1.547e+08 ± 1% -9.7% 1.397e+08 ± 0% hackbench.time.voluntary_context_switches 20736 ± 20% +254.5% 73507 ± 25% softirqs.NET_RX 432890 ± 15% +89.1% 818743 ± 18% softirqs.RCU 528670 ± 0% +18.9% 628410 ± 1% softirqs.SCHED 75.25 ± 1% -11.3% 66.75 ± 0% vmstat.procs.r 363821 ± 0% -6.3% 341078 ± 0% vmstat.system.cs 56805 ± 0% -7.4% 52594 ± 0% vmstat.system.in 6352414 ± 2% -17.8% 5221427 ± 1% proc-vmstat.numa_hit 6352382 ± 2% -17.8% 5221393 ± 1% proc-vmstat.numa_local 18746436 ± 1% -18.5% 15281493 ± 1% proc-vmstat.pgalloc_normal 18734627 ± 1% -18.5% 15269275 ± 1% proc-vmstat.pgfree 92.92 ± 0% +1.3% 94.16 ± 0% turbostat.%Busy 3431 ± 0% +1.3% 3476 ± 0% turbostat.Avg_MHz 6.95 ± 0% -17.6% 5.72 ± 0% turbostat.CPU%c1 0.03 ± 0% -50.0% 0.02 ± 33% turbostat.CPU%c3 49520562 ± 3% -47.6% 25951758 ± 1% cpuidle.C1E-IVB.time 874280 ± 1% -17.1% 725099 ± 1% cpuidle.C1E-IVB.usage 24613560 ± 5% -78.2% 5355682 ± 1% cpuidle.C3-IVB.time 196895 ± 3% -63.3% 72279 ± 1% cpuidle.C3-IVB.usage 12706889 ± 5% -45.6% 6918345 ± 1% cpuidle.C6-IVB.time 37427 ± 8% -75.0% 9356 ± 1% cpuidle.C6-IVB.usage 181016 ± 1% +21.0% 218998 ± 2% cpuidle.POLL.usage 0.50 ± 0% +1.7% 0.51 ± 0% perf-stat.branch-miss-rate% 10.45 ± 3% -16.3% 8.75 ± 1% perf-stat.cache-miss-rate% 1.051e+11 ± 1% +13.1% 1.189e+11 ± 1% perf-stat.cache-references 2.227e+08 ± 1% -6.8% 2.075e+08 ± 0% perf-stat.context-switches 15827085 ± 0% +55.5% 24608395 ± 1% perf-stat.cpu-migrations 2.82e+12 ± 1% -2.5% 2.749e+12 ± 1% perf-stat.dTLB-stores 9.469e+08 ± 1% -3.6% 9.126e+08 ± 1% perf-stat.iTLB-load-misses 0.74 ± 0% -2.7% 0.72 ± 1% perf-stat.ipc 16738 ± 11% -31.2% 11515 ± 16% sched_debug.cfs_rq:/.min_vruntime.stddev 16747 ± 11% -31.3% 11512 ± 16% sched_debug.cfs_rq:/.spread0.stddev 1107 ± 4% +11.0% 1229 ± 3% sched_debug.cfs_rq:/.util_avg.avg 1497 ± 6% +12.4% 1683 ± 3% sched_debug.cfs_rq:/.util_avg.max 239.41 ± 11% +19.2% 285.40 ± 5% sched_debug.cfs_rq:/.util_avg.stddev 226803 ± 7% -34.6% 148369 ± 8% sched_debug.cpu.avg_idle.max 69458 ± 8% -41.4% 40697 ± 35% sched_debug.cpu.avg_idle.stddev 1518435 ± 2% +16.3% 1766592 ± 6% sched_debug.cpu.nr_switches.stddev 3.33 ± 2% -8.0% 3.06 ± 1% perf-profile.calltrace.cycles-pp.__kmalloc_reserve.__alloc_skb.alloc_skb_with_frags.sock_alloc_send_pskb.unix_stream_sendmsg 3.02 ± 5% +16.7% 3.52 ± 2% perf-profile.calltrace.cycles-pp.__wake_up_common.__wake_up_sync_key.sock_def_readable.unix_stream_sendmsg.sock_sendmsg 4.20 ± 6% +26.3% 5.30 ± 2% perf-profile.calltrace.cycles-pp.__wake_up_sync_key.sock_def_readable.unix_stream_sendmsg.sock_sendmsg.sock_write_iter 1.01 ± 12% +38.0% 1.39 ± 9% perf-profile.calltrace.cycles-pp._raw_spin_lock.sock_sendmsg.sock_write_iter.__vfs_write.vfs_write 0.77 ± 21% +114.2% 1.66 ± 2% perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__wake_up_sync_key.sock_def_readable.unix_stream_sendmsg.sock_sendmsg 2.92 ± 5% +17.5% 3.43 ± 2% perf-profile.calltrace.cycles-pp.autoremove_wake_function.__wake_up_common.__wake_up_sync_key.sock_def_readable.unix_stream_sendmsg 4.46 ± 2% -18.0% 3.65 ± 1% perf-profile.calltrace.cycles-pp.call_cpuidle.cpu_startup_entry.start_secondary 1.05 ± 9% -22.4% 0.82 ± 7% perf-profile.calltrace.cycles-pp.copy_user_enhanced_fast_string.skb_copy_datagram_from_iter.unix_stream_sendmsg.sock_sendmsg.sock_write_iter 5.43 ± 2% -13.8% 4.68 ± 1% perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary 4.45 ± 2% -18.1% 3.65 ± 1% perf-profile.calltrace.cycles-pp.cpuidle_enter.call_cpuidle.cpu_startup_entry.start_secondary 4.42 ± 2% -18.4% 3.61 ± 1% perf-profile.calltrace.cycles-pp.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry.start_secondary 2.88 ± 5% +17.2% 3.38 ± 2% perf-profile.calltrace.cycles-pp.default_wake_function.autoremove_wake_function.__wake_up_common.__wake_up_sync_key.sock_def_readable 4.78 ± 3% -25.7% 3.55 ± 1% perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry 0.71 ± 22% +116.1% 1.54 ± 2% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.__wake_up_sync_key.sock_def_readable.unix_stream_sendmsg 0.00 ± -1% +Inf% 0.82 ± 22% perf-profile.calltrace.cycles-pp.select_task_rq_fair.try_to_wake_up.default_wake_function.autoremove_wake_function.__wake_up_common 1.77 ± 7% +15.5% 2.04 ± 2% perf-profile.calltrace.cycles-pp.skb_queue_tail.unix_stream_sendmsg.sock_sendmsg.sock_write_iter.__vfs_write 5.76 ± 4% +22.9% 7.07 ± 1% perf-profile.calltrace.cycles-pp.sock_def_readable.unix_stream_sendmsg.sock_sendmsg.sock_write_iter.__vfs_write 5.47 ± 2% -13.8% 4.71 ± 1% perf-profile.calltrace.cycles-pp.start_secondary 2.79 ± 5% +18.4% 3.31 ± 3% perf-profile.calltrace.cycles-pp.try_to_wake_up.default_wake_function.autoremove_wake_function.__wake_up_common.__wake_up_sync_key 1.63 ± 2% -13.6% 1.41 ± 1% perf-profile.children.cycles-pp.___slab_alloc 1.79 ± 2% -14.0% 1.54 ± 1% perf-profile.children.cycles-pp.__slab_alloc 3.47 ± 5% +18.1% 4.10 ± 1% perf-profile.children.cycles-pp.__wake_up_common 4.66 ± 5% +26.3% 5.89 ± 1% perf-profile.children.cycles-pp.__wake_up_sync_key 3.78 ± 4% +34.6% 5.08 ± 1% perf-profile.children.cycles-pp._raw_spin_lock_irqsave 3.37 ± 4% +18.9% 4.00 ± 2% perf-profile.children.cycles-pp.autoremove_wake_function 5.01 ± 1% -17.8% 4.12 ± 1% perf-profile.children.cycles-pp.call_cpuidle 6.11 ± 1% -13.4% 5.29 ± 0% perf-profile.children.cycles-pp.cpu_startup_entry 5.00 ± 1% -17.7% 4.11 ± 1% perf-profile.children.cycles-pp.cpuidle_enter 4.96 ± 1% -18.0% 4.07 ± 1% perf-profile.children.cycles-pp.cpuidle_enter_state 3.32 ± 5% +18.5% 3.93 ± 2% perf-profile.children.cycles-pp.default_wake_function 4.89 ± 1% -18.2% 4.00 ± 1% perf-profile.children.cycles-pp.intel_idle 2.36 ± 5% +47.3% 3.48 ± 4% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath 0.76 ± 6% +54.4% 1.18 ± 4% perf-profile.children.cycles-pp.prepare_to_wait 0.69 ± 6% +89.2% 1.31 ± 4% perf-profile.children.cycles-pp.select_task_rq_fair 5.80 ± 4% +22.7% 7.11 ± 1% perf-profile.children.cycles-pp.sock_def_readable 5.47 ± 2% -13.8% 4.71 ± 1% perf-profile.children.cycles-pp.start_secondary 3.21 ± 4% +19.8% 3.85 ± 2% perf-profile.children.cycles-pp.try_to_wake_up 1.48 ± 2% +10.7% 1.64 ± 3% perf-profile.children.cycles-pp.unix_write_space 2.44 ± 1% +16.1% 2.83 ± 1% perf-profile.self.cycles-pp._raw_spin_lock_irqsave 4.89 ± 1% -18.2% 4.00 ± 1% perf-profile.self.cycles-pp.intel_idle 2.36 ± 5% +47.3% 3.48 ± 4% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath 1.58 ± 0% +13.3% 1.79 ± 3% perf-profile.self.cycles-pp.sock_def_readable perf-stat.cpu-migrations 2.8e+07 ++----------------------------------------------------------------+ | O | 2.6e+07 O+ O O O O O O O O O O O O O O O O O O | | O O O O 2.4e+07 ++ O | | | 2.2e+07 ++ | | | 2e+07 ++ | | | 1.8e+07 ++ | | | 1.6e+07 *+.*..*.*..*..*..*.*..*..*..*.*..*..*..*.*..*..*..*.*..*..*..* | | | 1.4e+07 ++----------------------------------------------------------------+ turbostat.Avg_MHz 3490 ++-------------------------------------------------------------------+ | O O O O O O O | 3480 O+ O O O O O O O O O O | | O O O O O O O | | 3470 ++ | | | 3460 ++ | | | 3450 ++ | | | | | 3440 ++ .*..*.*..*..*.. .*..*..*..*..*.. | *..*..*. *..*..*..*..* *.. | 3430 ++-----------------------------------------------------*--*-*--*-----+ turbostat._Busy 94.6 ++-------------------------------------------------------------------+ | O | 94.4 O+ O O O O O O O O O O O O O O O O | 94.2 ++ O O O O O | | O O 94 ++ | 93.8 ++ | | | 93.6 ++ | 93.4 ++ | | | 93.2 ++ .*.. .*..*.. .*.. | 93 *+.*..*..*..*.*. *..*..*..*..*..* *. *..*.. | | *..*.*..* | 92.8 ++-------------------------------------------------------------------+ hackbench.time.percent_of_cpu_this_job_got 746 ++--------------------------------------------------------------------+ | O | 744 O+ O O O O O O O O O O O O O O O | | O O O O O | 742 ++ O O O | | 740 ++ | | | 738 ++ | | | 736 ++ | *.. .*..*.. .*..*.*..*.. .*..*..*..*..*.. | 734 ++ *. *. *..*..*..*. *. | | *..*..*..* | 732 ++--------------------------------------------------------------------+ [*] bisect-good sample [O] bisect-bad sample Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Xiaolong

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LKP November 2016