From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Kirk True <ktrue@movaris.com>,
kernelnewbies <kernelnewbies@nl.linux.org>,
Linux-MM@kvack.org
Subject: Re: LTP VM test slower under 2.6.3 than 2.4.20
Date: Fri, 20 Feb 2004 08:39:38 -0800 [thread overview]
Message-ID: <3800000.1077295177@[10.10.2.4]> (raw)
In-Reply-To: <40363778.20900@movaris.com>
> Hi all,
>
> Executing the LTP "mem01" VM test shows a huge time discrepancy between 2.4.20 and 2.6.3. Under 2.4.20 the total time is around 5 seconds, while under 2.6.3 the system seems to hang for nearly a minute.
>
> Where in particular should I start to look to see if it's a configuration/environment issue or a real problem? What other information would be helpful to know?
>
> Thanks greatly!!!
> Kirk
A kernel profile might help.
M.
> --------------
>
> 2.6.3:
>
># time /tmp/ltp-full-20040206/testcases/kernel/mem/mem/mem01
> Free Mem: 749 Mb
> Free Swap: 1992 Mb
> Total Free: 2741 Mb
> Total Tested: 1024 Mb
> mem01 0 INFO : touching 1024MB of malloc'ed memory (linear)
> mem01 1 PASS : malloc - alloc of 1024MB succeeded
>
> real 0m53.134s
> user 0m0.066s
> sys 0m3.292s
>
>
>
> 2.4.20:
>
># time /tmp/ltp-full-20040206/testcases/kernel/mem/mem/mem01
> Free Mem: 859 Mb
> Free Swap: 1992 Mb
> Total Free: 2852 Mb
> Total Tested: 1024 Mb
> mem01 0 INFO : touching 1024MB of malloc'ed memory (linear)
> mem01 1 PASS : malloc - alloc of 1024MB succeeded
>
> real 0m5.493s
> user 0m0.090s
> sys 0m1.260s
>
>
> --
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next prev parent reply other threads:[~2004-02-20 16:39 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 [this message]
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
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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