On Wed, 21 Nov 2007 17:42:15 +0900 KAMEZAWA Hiroyuki <[EMAIL PROTECTED]> 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] > [EMAIL PROTECTED] ~]$ 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 > [EMAIL PROTECTED] ~]$ 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] > [EMAIL PROTECTED] ~]$ 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 > [EMAIL PROTECTED] ~]$ time sync > > real 0m9.935s > user 0m0.001s > sys 0m0.113s > > [2.6.24-rc3] > [EMAIL PROTECTED] ~]$ 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 > [EMAIL PROTECTED] ~]$ time sync[2.6.24-rc2-mm1] > > > real 0m11.718s > user 0m0.000s > sys 0m0.138s Well I wonder how we did that. It seems OK here from a quick test (i386, ext3-on-IDE). Maybe device driver/block breakage? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
