5:11 p.m.
I'm trying to run some fio benchmarks and it doesn't seem to work for me.
The example in GitHub (
https://github.com/spdk/spdk/tree/master/examples/nvme/fio_plugin) doesn't
work (says "size=" is required) and it's very unclear if there needs to be
any configuration to point to the device.
It seems that when I run it everything goes straight to the root
filesystem (drive gets saturated with writes, all terminals freeze) or
memory (ungodly throughputs). Here's one input file:
[global]
ioengine=/home/hfingler/mlfs/libfs/lib/spdk/examples/nvme/fio_plugin/fio_plugin
thread=1
group_reporting=1
direct=1
verify=0
time_based=1
ramp_time=0
runtime=1
[test]
iodepth=128
rw=randread
bs=4k
numjobs=1
size=512M
And I get:
Run status group 0 (all jobs):
READ: io=10227MB, aggrb=10227MB/s, minb=10227MB/s,
maxb=10227MB/s,
mint=1000msec, maxt=1000msec
Am I using it correctly? Something seems off. Also, my root filesystem
gets saturated with writes. I can easily notice it using dstat. Is this
normal?
Could anyone give me a pointer or an example which works? My end goal is
to do some random writes benchmarks.
Thank you.
5:25 p.m.
On 01/20/2017 03:11 PM, Henrique Fingler wrote:
I'm trying to run some fio benchmarks and it doesn't seem to
work for
me. The example in GitHub
(https://github.com/spdk/spdk/tree/master/examples/nvme/fio_plugin)
doesn't work (says "size=" is required) and it's very unclear if
there needs to be any configuration to point to the device.
It seems that when I run it everything goes straight to the root
filesystem (drive gets saturated with writes, all terminals freeze)
or memory (ungodly throughputs). Here's one input file:
[global]
ioengine=/home/hfingler/mlfs/libfs/lib/spdk/examples/nvme/fio_plugin/fio_plugin
thread=1
group_reporting=1
direct=1
verify=0
time_based=1
ramp_time=0
runtime=1
[test]
iodepth=128
rw=randread
bs=4k
numjobs=1
size=512M
And I get:
Run status group 0 (all jobs): READ: io=10227MB, aggrb=10227MB/s,
minb=10227MB/s, maxb=10227MB/s, mint=1000msec, maxt=1000msec
Am I using it correctly? Something seems off. Also, my root
filesystem gets saturated with writes. I can easily notice it using
dstat. Is this normal?
Could anyone give me a pointer or an example which works? My end goal
is to do some random writes benchmarks.
Hi,
When using the SPDK NVMe fio_plugin, you need to specify a filename
in a special format. See examples/nvme/fio_plugin/README.md for the format.
For example:
fio yourconf.fio --filename=0000.04.00.0/1
Assuming yourconf.fio is the configuration above, this would run FIO
against the NVMe device at PCI domain 0, bus 4, device 0, function 0, NVMe
namespace ID 1.
There should not be any I/O activity to your root filesystems - all I/O
should bypass the kernel stack entirely if it is being processed by the
SPDK FIO plugin.
Thanks,
-- Daniel
9:41 p.m.
By the way, it is always needed to execute the ./<spdk_root_dir>/scripts/setup.sh
first.
A readme document can also be found at
https://github.com/spdk/spdk/blob/master/examples/nvme/fio_plugin/README.md
Thanks,
Gang
-----Original Message-----
From: SPDK [mailto:spdk-bounces@lists.01.org] On Behalf Of Daniel Verkamp
Sent: Saturday, January 21, 2017 6:25 AM
To: Storage Performance Development Kit <spdk(a)lists.01.org>; spdk(a)ml01.01.org
Subject: Re: [SPDK] How to use the fio plugin
On 01/20/2017 03:11 PM, Henrique Fingler wrote:
I'm trying to run some fio benchmarks and it doesn't seem to
work for
me. The example in GitHub
(https://github.com/spdk/spdk/tree/master/examples/nvme/fio_plugin)
doesn't work (says "size=" is required) and it's very unclear if there
needs to be any configuration to point to the device.
It seems that when I run it everything goes straight to the root
filesystem (drive gets saturated with writes, all terminals freeze) or
memory (ungodly throughputs). Here's one input file:
[global]
ioengine=/home/hfingler/mlfs/libfs/lib/spdk/examples/nvme/fio_plugin/f
io_plugin
thread=1
group_reporting=1
direct=1
verify=0
time_based=1
ramp_time=0
runtime=1
[test]
iodepth=128
rw=randread
bs=4k
numjobs=1
size=512M
And I get:
Run status group 0 (all jobs): READ: io=10227MB, aggrb=10227MB/s,
minb=10227MB/s, maxb=10227MB/s, mint=1000msec, maxt=1000msec
Am I using it correctly? Something seems off. Also, my root filesystem
gets saturated with writes. I can easily notice it using dstat. Is
this normal?
Could anyone give me a pointer or an example which works? My end goal
is to do some random writes benchmarks.
Hi,
When using the SPDK NVMe fio_plugin, you need to specify a filename in a special format.
See examples/nvme/fio_plugin/README.md for the format.
For example:
fio yourconf.fio --filename=0000.04.00.0/1
Assuming yourconf.fio is the configuration above, this would run FIO against the NVMe
device at PCI domain 0, bus 4, device 0, function 0, NVMe namespace ID 1.
There should not be any I/O activity to your root filesystems - all I/O should bypass the
kernel stack entirely if it is being processed by the SPDK FIO plugin.
Thanks,
-- Daniel
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participants (3)
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Cao, Gang -
Daniel Verkamp -
Henrique Fingler