linux-kernel - Re: [PATCH v3 1/3] cpufreq: ondemand: Change the calculation of target frequency

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Message-ID: <20130609211449.GA5517@pd.tnic>
Date:	Sun, 9 Jun 2013 23:14:49 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Stratos Karafotis <stratosk@...aphore.gr>,
	Borislav Petkov <bp@...e.de>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-pm@...r.kernel.org,
	cpufreq@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] cpufreq: ondemand: Change the calculation of
 target frequency

On Sun, Jun 09, 2013 at 10:58:51PM +0200, Rafael J. Wysocki wrote:
> Can you possibly prepare a graph showing both the execution time
> and energy consumption for several different loop durations in your
> program (let's keep the 5000 us sleep for now), including multiples of
> sampling_rate as well as some other durations?

Judgind by the times in C0 one of the cores spent, this small program
is single-threaded and is a microbenchmark. And you know how optimizing
against a microbenchmark doesn't really make a lot of sense.

I wonder if lmbench or aim9 or whatever would make more sense to try
here...

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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