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Date: Fri, 12 Nov 2021 20:25:14 +0800
From: Yin Fengwei <fengwei.yin@...el.com>
To: Kees Cook <keescook@...omium.org>, kernel test robot
<oliver.sang@...el.com>
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Mickaël Salaün <mic@...ux.microsoft.com>
Subject: Re: [fs] a0918006f9: netperf.Throughput_tps -11.6% regression
Hi Kees,
On 11/10/2021 1:21 AM, Kees Cook wrote:
>> 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?
I moved the syscall implementation to a stand alone file and put the file
to net directory for testing. The new patch is like:
https://zerobin.net/?a2b782afadf3c428#Me8l4AJuhiSCfaLVWVzydAVIK6ves0EVIVD76wLnVQo=
The test result is like following:
- on Cascade Lake: -10.4%
356365 -10.4% 319180 netperf.Throughput_total_tps
22272 -10.4% 19948 netperf.Throughput_tps
- on Cooper Lake: -4.0%
345772 ± 4% -4.0% 331814 netperf.Throughput_total_tps
21610 ± 4% -4.0% 20738 netperf.Throughput_tps
- on Ice Lake: -1.1%
509824 -1.1% 504434 netperf.Throughput_total_tps
31864 -1.1% 31527 netperf.Throughput_tps
Regards
Yin, Fengwei
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