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From: Alex Tomas <alex@clusterfs.com>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>,
	ext2-devel <ext2-devel@lists.sourceforge.net>,
	linux-fsdevel@vger.kernel.org, sct@redhat.com
Subject: Re: [Ext2-devel] Re: [RFC] ext3 writepages for writeback mode
Date: Sat, 12 Feb 2005 15:20:27 +0300	[thread overview]
Message-ID: <m3sm429dh0.fsf@bzzz.home.net> (raw)
In-Reply-To: 1108169488.20053.1241.camel@dyn318077bld.beaverton.ibm.com


>>>>> Badari Pulavarty (BP) writes:

 BP> Test: writes 10,000 blocks of 64k and does fdatasync().

The patch doesn't apply ;) after a minor correction
I've tested the patch too:

SMP, before:
[root@bob root]# time /work/tests/fwrite /test/fff 64 10000
real    0m17.748s user    0m0.032s sys     0m6.031s

[root@bob root]# time /work/tests/fwrite /test/fff 64 10000
real    0m16.016s user    0m0.015s sys     0m3.819s

[root@bob root]# time /work/tests/fwrite /test/fff 64 10000
real    0m19.074s user    0m0.014s sys     0m3.761s

[root@bob root]# time /work/tests/fwrite /test/fff 64 10000
real    0m22.011s user    0m0.010s sys     0m3.773s


SMP, after:
[root@bob root]# time /work/tests/fwrite /test/fff 64 10000
real    0m20.676s user    0m0.023s sys     0m5.643s

[root@bob root]# time /work/tests/fwrite /test/fff 64 10000
real    0m13.188s user    0m0.016s sys     0m3.511s

[root@bob root]# time /work/tests/fwrite /test/fff 64 10000
real    0m23.725s user    0m0.017s sys     0m3.399s

[root@bob root]# time /work/tests/fwrite /test/fff 64 10000
real    0m23.684s user    0m0.013s sys     0m3.421s 



UP, after:
[root@zefir root]# time /work/tests/fwrite /test/fff 64 10000
real    0m21.452s user    0m0.026s sys     0m6.105s

[root@zefir root]# time /work/tests/fwrite /test/fff 64 10000
real    0m23.317s user    0m0.027s sys     0m4.206s

[root@zefir root]# time /work/tests/fwrite /test/fff 64 10000
real    0m25.190s user    0m0.022s sys     0m4.026s

[root@zefir root]# time /work/tests/fwrite /test/fff 64 10000
real    0m25.024s user    0m0.021s sys     0m4.103s


UP, before:
[root@zefir root]# time /work/tests/fwrite /test/fff 64 10000
real    0m19.138s user    0m0.021s sys     0m5.980s

[root@zefir root]# time /work/tests/fwrite /test/fff 64 10000
real    0m23.123s user    0m0.026s sys     0m4.083s

[root@zefir root]# time /work/tests/fwrite /test/fff 64 10000
real    0m25.152s user    0m0.017s sys     0m3.836s

[root@zefir root]# time /work/tests/fwrite /test/fff 64 10000
real    0m25.217s user    0m0.026s sys     0m3.827s




AFAICS, the patch makes sense, but in my setup it doesn't
reduce sys.time so dramatically. all my boxes are P3-based.

thanks, Alex


  parent reply	other threads:[~2005-02-12 12:22 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-02-11  1:31 [RFC] ext3 writepages for writeback mode Badari Pulavarty
2005-02-11  1:53 ` Andrew Morton
2005-02-11  3:06   ` Badari Pulavarty
2005-02-11 23:29   ` Badari Pulavarty
2005-02-11 23:58     ` Andrew Morton
2005-02-12  0:09       ` Badari Pulavarty
2005-02-14 20:02         ` Sonny Rao
2005-02-14 20:22           ` [Ext2-devel] " Sonny Rao
2005-02-12  0:51       ` Badari Pulavarty
2005-02-12  1:00         ` Andrew Morton
2005-02-12  1:55           ` Badari Pulavarty
2005-02-12 12:20         ` Alex Tomas [this message]
2005-02-12 18:47           ` [Ext2-devel] " Badari Pulavarty
2005-02-12 21:43             ` Alex Tomas
2005-02-12 23:26           ` Badari Pulavarty
2005-02-12 23:29             ` Alex Tomas
2005-02-14 15:58               ` Badari Pulavarty
2005-02-14 16:34                 ` Alex Tomas
2005-02-14 16:50 ` Thiago Rondon
2005-02-14 18:08   ` Badari Pulavarty

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