[LKP] [mm] b72fd1470c9: -41.7% perf-profile.cpu-cycles.get_page_from_freelist.__alloc_pages_nodemask.alloc_pages_current.__page_cache_alloc.pagecache_get_page
From: Aaron Lu
Date: Thu Jul 31 2014 - 01:50:44 EST
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit b72fd1470c9735f53485d089aa918dc327a86077 ("mm: rearrange zone fields into read-only, page alloc, statistics and page reclaim lines")
test case: lkp-st02/dd-write/5m-11HDD-JBOD-cfq-xfs-10dd
e28c951ff01a805 b72fd1470c9735f53485d089a
--------------- -------------------------
1.06 ~ 6% -41.7% 0.62 ~ 3% TOTAL perf-profile.cpu-cycles.get_page_from_freelist.__alloc_pages_nodemask.alloc_pages_current.__page_cache_alloc.pagecache_get_page
1.34 ~ 2% -19.8% 1.07 ~ 2% TOTAL perf-profile.cpu-cycles.__block_write_begin.xfs_vm_write_begin.generic_perform_write.xfs_file_buffered_aio_write.xfs_file_write_iter
1.19 ~ 5% -12.1% 1.05 ~ 4% TOTAL perf-profile.cpu-cycles.copy_from_user_atomic_iovec.iov_iter_copy_from_user_atomic.generic_perform_write.xfs_file_buffered_aio_write.xfs_file_write_iter
2.78 ~ 1% -16.3% 2.32 ~ 4% TOTAL perf-profile.cpu-cycles.__clear_user.read_zero.read_zero.vfs_read.sys_read
2.96e+09 ~ 4% -5.2% 2.806e+09 ~ 0% TOTAL perf-stat.cache-misses
3.86e+12 ~ 5% -5.2% 3.658e+12 ~ 1% TOTAL perf-stat.ref-cycles
Legend:
~XX% - stddev percent
[+-]XX% - change percent
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Aaron
echo 1 > /sys/kernel/debug/tracing/events/writeback/balance_dirty_pages/enable
echo 1 > /sys/kernel/debug/tracing/events/writeback/bdi_dirty_ratelimit/enable
echo 1 > /sys/kernel/debug/tracing/events/writeback/global_dirty_state/enable
echo 1 > /sys/kernel/debug/tracing/events/writeback/writeback_single_inode/enable
mkfs -t xfs /dev/sdb1
mkfs -t xfs /dev/sdj1
mkfs -t xfs /dev/sdh1
mkfs -t xfs /dev/sde1
mkfs -t xfs /dev/sdc1
mkfs -t xfs /dev/sdk1
mkfs -t xfs /dev/sdd1
mkfs -t xfs /dev/sdf1
mkfs -t xfs /dev/sdg1
mkfs -t xfs /dev/sdi1
mkfs -t xfs /dev/sdl1
mount -t xfs -o nobarrier,inode64 /dev/sdb1 /fs/sdb1
mount -t xfs -o nobarrier,inode64 /dev/sdc1 /fs/sdc1
mount -t xfs -o nobarrier,inode64 /dev/sdd1 /fs/sdd1
mount -t xfs -o nobarrier,inode64 /dev/sde1 /fs/sde1
mount -t xfs -o nobarrier,inode64 /dev/sdf1 /fs/sdf1
mount -t xfs -o nobarrier,inode64 /dev/sdg1 /fs/sdg1
mount -t xfs -o nobarrier,inode64 /dev/sdh1 /fs/sdh1
mount -t xfs -o nobarrier,inode64 /dev/sdi1 /fs/sdi1
mount -t xfs -o nobarrier,inode64 /dev/sdj1 /fs/sdj1
mount -t xfs -o nobarrier,inode64 /dev/sdk1 /fs/sdk1
mount -t xfs -o nobarrier,inode64 /dev/sdl1 /fs/sdl1
dd if=/dev/zero of=/fs/sdb1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-1 status=noxfer &
dd if=/dev/zero of=/fs/sdb1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-2 status=noxfer &
dd if=/dev/zero of=/fs/sdb1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-3 status=noxfer &
dd if=/dev/zero of=/fs/sdb1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-4 status=noxfer &
dd if=/dev/zero of=/fs/sdb1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-5 status=noxfer &
dd if=/dev/zero of=/fs/sdb1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-6 status=noxfer &
dd if=/dev/zero of=/fs/sdb1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-7 status=noxfer &
dd if=/dev/zero of=/fs/sdb1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-8 status=noxfer &
dd if=/dev/zero of=/fs/sdb1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-9 status=noxfer &
dd if=/dev/zero of=/fs/sdb1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sdc1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sdd1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sde1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sdf1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sdg1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sdh1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sdi1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sdj1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sdk1/zero-10 status=noxfer &
dd if=/dev/zero of=/fs/sdl1/zero-10 status=noxfer &
sleep 298
killall -9 dd