linux-kernel - Re: [PATCH 2/2] Add a thread cpu time implementation to vDSO

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Date:	Mon, 12 Dec 2011 16:26:19 -0800
From:	Arun Sharma <asharma@...com>
To:	john stultz <johnstul@...ibm.com>
CC:	<linux-kernel@...r.kernel.org>, Kumar Sundararajan <kumar@...com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andy Lutomirski <luto@....EDU>
Subject: Re: [PATCH 2/2] Add a thread cpu time implementation to vDSO

On 12/12/11 3:32 PM, john stultz wrote:

> Is it just that you're concerned about the clockid switch costs being
> too high?

Yeah - but I have no real-world data to back it up (I don't think micro 
benchmarks are a good way to analyze this).

clock_gettime_ns() may just be the right answer here.

  -Arun
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