linux-kernel - Re: [RFC][PATCH 0/3] Skip I/O merges when disabled

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Message-ID: <48108E85.50209@hp.com>
Date:	Thu, 24 Apr 2008 09:43:33 -0400
From:	"Alan D. Brunelle" <Alan.Brunelle@...com>
To:	"Alan D. Brunelle" <Alan.Brunelle@...com>
Cc:	linux-kernel@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [RFC][PATCH 0/3] Skip I/O merges when disabled

Alan D. Brunelle wrote:

>
> Kernel                NM  I/Os per second
> --------------------  --  ---------------
> 2.6.25 (not patched)           483,727.36
> 2.6.25 + nomerges      0       483,880.96
> 2.6.25 + nomerges      1       483,921.92

Wrong chart, sorry:

Kernel                NM  I/Os per second
--------------------  --  ---------------
2.6.25 (not patched)               472.39
2.6.25 + nomerges      0           472.54
2.6.25 + nomerges      1           472.58

(Don't think a little 2-way box w/ 4 SATA drives can really approach
500K I/Os per second...)

Alan
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