linux-kernel - Re: ring-buffer: Kernel threads cpu utilization.

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Message-Id: <1246626360.21331.2.camel@localhost.localdomain>
Date:	Fri, 03 Jul 2009 09:06:00 -0400
From:	Steven Rostedt <srostedt@...hat.com>
To:	Tej <bewith.tej@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: ring-buffer: Kernel threads cpu utilization.

On Fri, 2009-07-03 at 11:36 +0530, Tej wrote:
> rb_producer and rb_comsumer, kernel thread uses lot of CPU (~100%)
> bandwidth every 10s.
> 
> bisection results commit:
> [5092dbc96f3acdac5433b27c06860352dc6d23b9] ring-buffer: add benchmark and tester
> I have read commit logs:
> git log -r 5092dbc96f3acdac5433b27c06860352dc6d23b9
> 
> Is it correct behavior for these thread to consume this much cpu
> bandwidth even if someone selects rb benchmarks config options?

Yes, that's a benchmark module, not something to be running on a
production system. It consumes a lot of CPU time, because it is running
a constant benchmark, and tests.

-- Steve

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