On Thu, 15 Sep 2005 21:16:51 +0800
WU Fengguang <[email protected]> wrote:
> oprofile() {
> opcontrol --vmlinux=/temp/kernel/linux-2.6.13ra/vmlinux
> opcontrol --start
> opcontrol --reset
> echo $1 > /proc/sys/vm/readahead_ratio
> dd if=/temp/kernel/hugefile of=/dev/null bs=$bs
> opreport -l -o oprofile.$1.$bs /temp/kernel/linux-2.6.13ra/vmlinux
> opcontrol --stop
> }
just a side note: shouldn't you umount and remount "/temp" to remove
the pagecache? Or is the file so big that it doesn't matter?
PS: instead of unmount/remount you can use "fadvise":
http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz
--
Paolo Ornati
Linux 2.6.14-rc1 on x86_64
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