From: Andrea Arcangeli <andrea@suse.de>
To: linux-kernel@vger.kernel.org
Subject: Re: problems with I/O performance with 2.4.12-ac3
Date: Mon, 22 Oct 2001 14:09:35 +0200 [thread overview]
Message-ID: <20011022140935.I26029@athlon.random> (raw)
In-Reply-To: <20011019195328.A30781@localhost>
In-Reply-To: <20011019195328.A30781@localhost>; from vdb@mail.ru on Fri, Oct 19, 2001 at 07:53:28PM +0400
On Fri, Oct 19, 2001 at 07:53:28PM +0400, Dmitry Volkoff wrote:
> Hi,
> On my machine HDD is slow with all ac-kernels I've tried so far.
> There is even more simple test -- hdparm.
>
> 2.4.12-ac3:
> # hdparm -tT /dev/hda
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 0.70 seconds =182.86 MB/sec
> Timing buffered disk reads: 64 MB in 2.88 seconds = 22.22 MB/sec
>
> 2.4.13-pre3:
> # hdparm -tT /dev/hda
> /dev/hda
> Timing buffer-cache reads: 128 MB in 0.63 seconds =203.00 MB/sec
> Timing buffered disk reads: 64 MB in 1.57 seconds = 40.76 MB/sec
this should be mostly the blkdev in pagecache and possibly also the vm.
Andrea
next prev parent reply other threads:[~2001-10-22 12:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-19 15:53 problems with I/O performance with 2.4.12-ac3 Dmitry Volkoff
2001-10-22 12:09 ` Andrea Arcangeli [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-10-19 14:30 Andrei Lahun
2001-10-19 13:27 ` safemode
2001-10-19 17:14 ` Andrei Lahun
2001-10-20 0:16 ` safemode
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