[SPDK] Performance impact with "enable_zerocopy_send"

Charlie Li <charlie.li at gmail.com>
Newsgroups dev.linux.lists.spdk
Message-ID <CAO=HJQNeUa42doUMh3c6=9mR-0mua3KiEQkv6zatOkyHSOMauw@mail.gmail.com> 
Hello,

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
dropped.

Is this as expected? My understanding is that setting
"enable_zerocopy_send" to true should improve performance.

Thanks,
Charlie
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