Re: 2.6.24-rc3-mm1 (sync is slow ?)
- From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
- Date: Thu, 22 Nov 2007 12:06:43 +0900
On Wed, 21 Nov 2007 00:49:09 -0800
Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
On Wed, 21 Nov 2007 17:42:15 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote:
Hi, Andrew
I got following result in 'sync' command.
It was too slow. (memory controller config is off ;)
I attaches my .config.
==
[2.6.24-rc3-mm1]
[kamezawa@dr-test2 ~]$ dd if=/dev/zero of=./tmpfile bs=4096 count=100000
100000+0 records in
100000+0 records out
409600000 bytes (410 MB) copied, 1.46706 seconds, 279 MB/s
[kamezawa@dr-test2 ~]$ time sync
real 3m6.440s
user 0m0.000s
sys 0m0.133s
Well I wonder how we did that.
It seems OK here from a quick test (i386, ext3-on-IDE).
Maybe device driver/block breakage?
I confirmed This slowdown is caused by git-scsi-misc.patch.
I'm sorry that I can't chase more and will be offline in this weekend.
This is scsi_mod information in /proc/modules
=
scsi_mod 409416 8 mptctl,sg,lpfc,scsi_transport_fc,mptspi,mptscsih,scsi_transport_spi,sd_mod, Live 0xa000000202818000
=
What information should I provide more ?
Thanks,
-Kame
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