linux-kernel - Re: [x86/mce] 7bb39313cd: netperf.Throughput

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Message-ID: <20210119100255.GC27433@zn.tnic>
Date:   Tue, 19 Jan 2021 11:02:55 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Feng Tang <feng.tang@...el.com>,
        kernel test robot <oliver.sang@...el.com>,
        Jonathan Lemon <bsd@...com>, Tony Luck <tony.luck@...el.com>,
        LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        lkp@...ts.01.org, lkp@...el.com, ying.huang@...el.com,
        zhengjun.xing@...el.com
Subject: Re: [x86/mce]  7bb39313cd:  netperf.Throughput_tps -4.5% regression

On Mon, Jan 18, 2021 at 08:27:21PM -0800, Paul E. McKenney wrote:
> I bet that the results vary depending on the type of CPU, and also on
> the kernel address-space layout, which of course also varies based on
> the Kconfig options.  Let's see how the maintainers would like to proceed.

So I ran the "reproduce" script in the original mail on a KBL box here
with the .config tailored for it:

cpu family      : 6
model           : 158
model name      : Intel(R) Core(TM) i5-9600K CPU @ 3.70GHz
stepping        : 12
microcode       : 0xd6

and I get mixed results. But I'd need to know how exactly they generate
the metrics "netperf.Throughput_total_tps" and "netperf.Throughput_tps"

Feng?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette