linux-kernel - Re: [tip:tracing/core] ring-buffer benchmark: Run producer/consumer threads at nice +19

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Date:	Tue, 24 Nov 2009 09:20:18 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	mingo@...hat.com
Cc:	hpa@...or.com, linux-kernel@...r.kernel.org, fweisbec@...il.com,
	a.p.zijlstra@...llo.nl, efault@....de, tglx@...utronix.de,
	mingo@...e.hu, linux-tip-commits@...r.kernel.org
Subject: Re: [tip:tracing/core] ring-buffer benchmark: Run
 producer/consumer threads at nice +19

On Tue, 2009-11-24 at 09:16 -0500, Steven Rostedt wrote:

> > Renice them to +19 to make them less intrusive.
> 
> Ingo, that is the point of a benchmark!
> 
> This module is not made to be run all the time. I know you do it for
> testing. But running it at lowest priority kills the reason this module
> was made in the first place!

Note, I first wrote this where the threads ran at SCHED_FIFO (but never
published it that way). I was afraid if something went wrong, it would
lock up the system. But still, it is a benchmark module. It is for
developers and analyzers only. Not for common users.

-- Steve


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