From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Chris Friesen" <cfriesen@nortel.com>
Subject: Re: Issue with SCHED_FIFO app
Date: Mon, 17 May 2010 14:51:29 -0600
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To: Xianghua Xiao <xiaoxianghua@gmail.com>
Cc: Con Kolivas <kernel@kolivas.org>, Suresh Rajashekara <suresh.raj+linuxomap@gmail.com>, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org
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On 05/12/2010 09:16 PM, Xianghua Xiao wrote:

> I'm unsure if the newest "top" (or /proc/PID/stat) reports the correct
> cpu usage when CFS/BFS is used, as you mentioned it seems failed to do
> that. I will try to stress the system and see who fails first under
> same workload, maybe that's the only way to compare cpu usage between
> 2.6.18rt vs 2.6.33rt, for now.

If you turn on scheduler debugging, then /proc/sched_debug gives
accurate information using the scheduler clock (at least with CFS, not
sure about BFS).

Chris