On 11/10/2021 4:52 PM, Mickaël Salaün wrote:

quoted

quoted

---------------- ---------------------------
         %stddev     %change         %stddev
             \          |                \
    555600            -0.1%     555305        netperf.Throughput_total_tps
     34725            -0.1%      34706        netperf.Throughput_tps


Fengwei also helped review these results and commented:
I suppose these three CPUs have different cache policy. It also could be
related with netperf throughput testing.

Does moving the syscall implementation somewhere else change things?
That's a _huge_ performance change for something that isn't even called.
What's going on here?

This regression doesn't make sense. I guess this is the result of a
flaky netperf test, maybe because the test machine was overloaded at
that time.

I agree the test result looks strange. But I don't think the test machine
or test methodology has issue. It's not possible the test box is overloaded
when test case is running. We did test several times (> 12 times) on different
days. Thanks.


Regards
Yin, Fengwei