From: Kirk True <ktrue@movaris.com>
To: Andrew Morton <akpm@osdl.org>
Cc: kernelnewbies@nl.linux.org, Linux-MM@kvack.org
Subject: Re: LTP VM test slower under 2.6.3 than 2.4.20
Date: Mon, 23 Feb 2004 08:51:21 -0800 [thread overview]
Message-ID: <403A2F89.4070405@movaris.com> (raw)
In-Reply-To: <20040222231903.5f9ead5c.akpm@osdl.org>
Hi Andrew,
> I'd be wondering if your disk system is correctly running in DMA mode.
Apparently support for my hardware isn't magically preset in 2.6.3 as it
was somehow in 2.4. After including it in the kernel the values returned
by hdparm -Tt /dev/hda/ were sped up by a factor of 10! Thanks!
But...
> On my 256MB test box, mem01 takes 31 seconds under 2.4.25, 25 seconds
> under 2.6.3-mm3.
...I'm still seeing a factor of two speed slowdown between 2.4.20 and
2.6.3. Would it help to do a vmstat log/graph for the new results?
Kirk
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next prev parent reply other threads:[~2004-02-23 16:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-20 16:36 Kirk True
2004-02-20 16:39 ` Martin J. Bligh
2004-02-20 18:57 ` Kirk True
2004-02-20 19:03 ` Kirk True
[not found] ` <40363DEE.9040608@movaris.com>
[not found] ` <5760000.1077296989@[10.10.2.4]>
2004-02-22 15:32 ` Kirk True
2004-02-20 22:45 ` Nick Piggin
2004-02-21 2:50 ` Kirk True
2004-02-21 2:50 ` Kirk True
2004-02-21 15:39 ` Kirk True
2004-02-23 7:19 ` Andrew Morton
2004-02-23 16:51 ` Kirk True [this message]
2004-02-23 19:42 ` Andrew Morton
2004-02-24 15:08 ` Kirk True
2004-02-24 23:38 ` Andrew Morton
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