linux-kernel - Re: perf_events: zero time running and enabled, but non-zero count

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Message-ID: <20091023205711.GB8356@elte.hu>
Date:	Fri, 23 Oct 2009 22:57:11 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, paulus@....ibm.com,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: perf_events: zero time running and enabled, but non-zero count


* Corey Ashford <cjashfor@...ux.vnet.ibm.com> wrote:

>> Btw., you might want to consider putting such testcases into a new 
>> 'perf test' kind of utility (under tools/perf/builtin-test.c) that 
>> does various tests such as reading a count and validating the 
>> time-running/time-enabled values - so that we can see any bugs 
>> directly.
>
> I'll see if I can put the test case in some sort of acceptable format 
> like that.  Maybe we can use this one test case as the starting point 
> for builtin-test.c.

Yeah. Feel free to add just something minimal that solves your problem. 
Others will add their testcases too i'm sure, once the basic command is 
there.

	Ingo
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