linux-kernel - RE: [RFC/RFT][PATCH v6] cpuidle: New timer events oriented governor for tickless systems

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Date:   Sat, 8 Dec 2018 08:24:20 -0800
From:   "Doug Smythies" <dsmythies@...us.net>
To:     "'Giovanni Gherdovich'" <ggherdovich@...e.cz>
Cc:     "'Srinivas Pandruvada'" <srinivas.pandruvada@...ux.intel.com>,
        "'Peter Zijlstra'" <peterz@...radead.org>,
        "'LKML'" <linux-kernel@...r.kernel.org>,
        "'Frederic Weisbecker'" <frederic@...nel.org>,
        "'Mel Gorman'" <mgorman@...e.de>,
        "'Daniel Lezcano'" <daniel.lezcano@...aro.org>,
        "'Linux PM'" <linux-pm@...r.kernel.org>,
        "'Rafael J. Wysocki'" <rjw@...ysocki.net>,
        "Doug Smythies" <dsmythies@...us.net>
Subject: RE: [RFC/RFT][PATCH v6] cpuidle: New timer events oriented governor for tickless systems

On 2018.12.08 02:23 Giovanni Gherdovich wrote:

> sorry for the late reply, this week I was traveling.

No Problem. Thanks very much for your very detailed reply,
which obviously took considerable time to write. While
I was making progress, your instructions really fill in
some gaps and mistakes I was making.

Eventually (probably several days) I'll report back my test
results.


> Some specific remarks you raise:
>
> On Mon, 2018-12-03 at 08:23 -0800, Doug Smythies wrote:
>> ...
>> My issue is that I do not understand the output or how it
>> might correlate with your tables.
>> 
>> I get, for example:
>> 
>>    3    1   1     0.13s     0.68s     0.80s  1003894.302 1003779.613
>>    3    1   1     0.16s     0.64s     0.80s  1008900.053 1008215.336
>>    3    1   1     0.14s     0.66s     0.80s  1009630.439 1008990.265
>> ...
>> 
>> But I don't know what that means, nor have I been able to find
>> a description anywhere.
>
> I don't recognize this output. I hope the illustration above can clarify how
> MMTests is used.

Due to incompetence on my part, the config file being run for my tests was
always just the default config file from my original
git clone https://github.com/gormanm/mmtests.git
command. So regardless of what I thought I was doing, I was running "pft"
(Page Fault Test).

... Doug