| Date | Wed, 21 Nov 2007 17:49:48 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: 2.6.24-rc3-mm1 (sync is slow ?) |
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On Wed, 21 Nov 2007 17:42:15 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> 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 > Ah, one of cpu shows 100% iowait in 'top' command while this.
-Kame
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