linux-kernel - Re: [RFC PATCH 0/2] PM / devfreq: Add delayed timer for polling

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Message-ID: <20200703123346.6fy6i33ks6nox46a@macmini.local>
Date:   Fri, 3 Jul 2020 14:33:46 +0200
From:   Willy Wolff <willy.mh.wolff.ml@...il.com>
To:     Chanwoo Choi <cw00.choi@...sung.com>
Cc:     lukasz.luba@....com, k.konieczny@...sung.com, krzk@...nel.org,
        kgene@...nel.org, s.nawrocki@...sung.com, b.zolnierkie@...sung.com,
        chanwoo@...nel.org, myungjoo.ham@...sung.com,
        kyungmin.park@...sung.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC PATCH 0/2] PM / devfreq: Add delayed timer for polling

Hi Chanwoo,

I think it doesn't help on the benchmark I suggested that is doing only memory
accesses. With both timer, I have the same timing.

To test the benchmark with these new patches about timer:

git clone https://github.com/wwilly/benchmark.git \
  && cd benchmark \
  && source env.sh \
  && ./bench_build.sh \
  && bash source/scripts/test_dvfs_mem_patched.sh

The benchmark is set by default to run for 1s, but you can increase this by
tweaking the script as:

taskset 8 ./bench_install/bin/microbe_cache 33554431 0 9722222 <TIME in sec> ${little_freq}

Also, as I reported the issue, would it be possible to add a
Reported-by: Willy Wolff <willy.mh.wolff.ml@...il.com> ?
Many thanks in advance.

Best Regards,
Willy