| Date | Wed, 21 Nov 2007 17:42:15 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: 2.6.24-rc3-mm1 (sync is slow ?) |
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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
on, 2.6.23-rc2-mm1, 2.6.23-rc3 there was no problem. == [2.6.24-rc3] [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, 2.07717 seconds, 197 MB/s [kamezawa@dr-test2 ~]$ time sync
real 0m9.935s user 0m0.001s sys 0m0.113s
[2.6.24-rc3] [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, 1.37147 seconds, 299 MB/s [kamezawa@dr-test2 ~]$ time sync[2.6.24-rc2-mm1]
real 0m11.718s user 0m0.000s sys 0m0.138s
== -Kame [unhandled content-type:application/octet-stream] |