Subject: Re: [RFC][PATCH v2 5/7] taskstats: Improve cumulative CPU time
 accounting
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
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
In-Reply-To: <20101115165521.21baac60@mschwide.boeblingen.de.ibm.com>
References: <20101111170352.732381138@linux.vnet.ibm.com>
	 <20101111170815.404670062@linux.vnet.ibm.com>
	 <20101113183810.GA9021@redhat.com>
	 <20101115165521.21baac60@mschwide.boeblingen.de.ibm.com>
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Date: Mon, 15 Nov 2010 17:03:56 +0100
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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? 

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