From: Ram Pai <linuxram@us.ibm.com>
To: Suparna Bhattacharya <suparna@in.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>,
Badari Pulavarty <pbadari@us.ibm.com>,
<linux-kernel@vger.kernel.org>, <linux-aio@kvack.org>
Subject: Re: [PATCH][2.6-mm] Readahead issues and AIO read speedup
Date: Wed, 13 Aug 2003 14:06:41 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.44.0308131253460.2026-100000@localhost> (raw)
In-Reply-To: <20030808135645.GA3430@in.ibm.com>
I ran an Database workload on the test3-mm1 bits and got around 20%
improvement. These bits have Suparna's readahead_patch.
The number of 4k read requests sent to the driver reduced significantly by
95%. Effectively generating lesser number of larger-size read-requests.
And the number of readahead-window-resets dropped down by 50%.
FYI,
Ram Pai
On Fri, 8 Aug 2003, Suparna Bhattacharya wrote:
> On Thu, Aug 07, 2003 at 01:58:19PM -0700, Andrew Morton wrote:
> > Badari Pulavarty <pbadari@us.ibm.com> wrote:
> > >
> > > On Thursday 07 August 2003 10:39 am, Andrew Morton wrote:
> > > > Badari Pulavarty <pbadari@us.ibm.com> wrote:
> > > > > We should do readahead of actual pages required by the current
> > > > > read would be correct solution. (like Suparna suggested).
--
Ram Pai
linuxram@us.ibm.com
----------------------------------
next prev parent reply other threads:[~2003-08-13 20:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-07 10:01 Suparna Bhattacharya
2003-08-07 16:01 ` Badari Pulavarty
2003-08-07 16:28 ` Andrew Morton
2003-08-07 17:21 ` Badari Pulavarty
2003-08-07 17:39 ` Andrew Morton
2003-08-07 20:41 ` Badari Pulavarty
2003-08-07 20:58 ` Andrew Morton
2003-08-08 13:56 ` Suparna Bhattacharya
2003-08-13 21:06 ` Ram Pai [this message]
2003-09-23 0:41 ` Ram Pai
2003-08-07 19:36 ` Joel Becker
2003-08-08 5:42 ` Jens Axboe
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