Could you add more details about the performance drop? Are you using SPDK target and/or
initiator and what is payload size?
I would expect some degradation with small payloads, as written it this doc
"MSG_ZEROCOPY is generally only effective at writes over around 10 KB. "
From: Charlie Li <charlie.li(a)gmail.com>
Sent: Wednesday, January 20, 2021 12:41 AM
To: Storage Performance Development Kit <spdk(a)lists.01.org>
Subject: [SPDK] Performance impact with "enable_zerocopy_send"
In SPDK 20.10, "enable_zerocopy_send" is set to "false" by default.
I tried to set "enable_zerocopy_send" to true, but noticed the performance
Is this as expected? My understanding is that setting "enable_zerocopy_send" to
true should improve performance.
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