linux-kernel - Re: clock_getres() and real resolution

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Message-ID: <20120209051218.GC2211@netboy.at.omicron.at>
Date:	Thu, 9 Feb 2012 06:12:18 +0100
From:	Richard Cochran <richardcochran@...il.com>
To:	Dmitry Antipov <dmitry.antipov@...aro.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <john.stultz@...aro.org>,
	linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org
Subject: Re: clock_getres() and real resolution

On Wed, Feb 08, 2012 at 08:31:03AM -0800, Dmitry Antipov wrote:
> IIUC, an idea behind clock_getres() is to give a hint about the resolution of
> specified clock. This hint may be used by an application programmer to check whether
> this clock is suitable for a some purpose. So why clock_getres() always returns
> something like {0, 1} (if hrtimers are enabled) regardless of the underlying platform's
> real numbers?

I think "resolution" does not mean tick duration, but rather the finest timer unit.

HTH,
Richard
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