Hi Sunil,
On 2/1/22 15:23, Pai G, Sunil wrote:
Hi ,
This version of the patch seems to have negative impact on performance for
burst traffic profile[1].
Benefits seen with the previous version (v2) was up to ~1.6x for 1568 byte
packets compared to ~1.2x seen with the current design (v3) as measured on new
Intel hardware that supports DSA [2] , CPU @ 1.8Ghz.
The cause of the drop seems to be because of the excessive vhost txq contention
across the PMD threads.
So it means the Tx/Rx queue pairs aren't consumed by the same PMD
thread. can you confirm?
[1]:
https://builders.intel.com/docs/networkbuilders/open-vswitch-optimized-deployment-benchmark-technology-guide.pdf
[2]: https://01.org/blogs/2019/introducing-intel-data-streaming-accelerator
Thanks and regards
Sunil
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