linux-kernel - Re: [PATCH] loop: Limit the number of requests in the bio list

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Message-ID: <x49haqbvbnb.fsf@segfault.boston.devel.redhat.com>
Date:	Wed, 03 Oct 2012 11:05:44 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Lukáš Czerner <lczerner@...hat.com>
Cc:	Dave Chinner <dchinner@...hat.com>, Jens Axboe <axboe@...nel.dk>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] loop: Limit the number of requests in the bio list

Lukáš Czerner <lczerner@...hat.com> writes:

>> Did you look at system time?
>> 
>> -Jeff
>
> Hi, none of the times showed any significant difference, there was
> not any pattern suggesting a problem. Also the system time is included
> in the real time, so it would show anyway I guess.

Only if you're cpu bound.  If you aren't, elevated system time may not
increase overall runtime.

Cheers,
Jeff
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