From mboxrd@z Thu Jan  1 00:00:00 1970
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Subject: Re: [RFC][PATCH v2 5/7] taskstats: Improve cumulative CPU time
 accounting
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
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Date: Mon, 15 Nov 2010 17:03:56 +0100
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To: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>, Michael Holzheu <holzheu@linux.vnet.ibm.com>, Shailabh Nagar <nagar1234@in.ibm.com>, Andrew Morton <akpm@linux-foundation.org>, Venkatesh Pallipadi <venki@google.com>, Suresh Siddha <suresh.b.siddha@intel.com>, Ingo Molnar <mingo@elte.hu>, John stultz <johnstul@us.ibm.com>, Thomas Gleixner <tglx@linutronix.de>, Balbir Singh <balbir@linux.vnet.ibm.com>, Heiko Carstens <heiko.carstens@de.ibm.com>, Roland McGrath <roland@redhat.com>, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
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On Mon, 2010-11-15 at 16:55 +0100, Martin Schwidefsky wrote:
>  What we want is a low-overhead tool that precisely shows
> where the cpu spent its time (or didn't because of steal time). The
> granularity target is tenths of microseconds, something that should be
> possible with decent hardware. 

To what purpose?