From: "Éric Piel" <eric.piel@tremplin-utc.net>
To: Mike Chan <mike@android.com>
Cc: davej@codemonkey.org.uk, linux-kernel@vger.kernel.org,
cpufreq@vger.kernel.org
Subject: Re: [PATCH] cpufreq: Governor poll frequency tuneables exported in config.
Date: Mon, 16 Feb 2009 14:33:54 +0100 [thread overview]
Message-ID: <49996B42.5040500@tremplin-utc.net> (raw)
In-Reply-To: <1234469284-15924-1-git-send-email-mike@android.com>
Mike Chan schreef:
> cpufreq: Governor poll frequency tuneables exported in config.
>
Hello,
> +config CPU_FREQ_MIN_TICKS
> + int "Ticks between governor polling interval."
> + default 10
> + help
> + Minimum number of ticks between polling interval for governors.
I don't think it makes much sense to let anyone tune this parameter.
This is a constant that says we need at least a 10% granularity to
compute any statistic correctly. There is nothing much to be discussed
or tuned.
> +config CPU_FREQ_SAMPLING_LATENCY_MULTIPLIER
> + int "Sampling rate multiplier for governors."
> + default 1000
> + help
> + Sampling latency rate multiplied by the cpu switch latency.
> + Affects governor polling.
This one, why not (although I don't think it's worth neither), and it
would need a better documentation.
Eric
next prev parent reply other threads:[~2009-02-16 13:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-12 20:08 [PATCH] cpufreq: Governor poll frequency tuneables exported in config Mike Chan
2009-02-16 13:33 ` Éric Piel [this message]
2009-02-16 14:46 ` Thomas Renninger
2009-02-18 1:11 ` Mike Chan
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