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Date: Mon, 29 Dec 2014 14:57:31 +0800
From: Huang Ying <ying.huang@...el.com>
To: Carlos Maiolino <cmaiolino@...hat.com>
Cc: Dave Chinner <david@...morbit.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [LKP] [xfs] dbe1b5ca263: +6.5% will-it-scale.per_thread_ops
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit dbe1b5ca26396b6c61d711c8ac4de13ebb02e9f6 ("xfs: Make xfs_vn_rename compliant with renameat2() syscall")
testbox/testcase/testparams: lkp-nex05/will-it-scale/performance-pwrite1
v3.19-rc1 dbe1b5ca26396b6c61d711c8ac
---------------- --------------------------
%stddev %change %stddev
\ | \
1131870 ± 0% +6.5% 1205531 ± 0% will-it-scale.per_thread_ops
1209729 ± 0% +5.8% 1280184 ± 0% will-it-scale.per_process_ops
0.54 ± 0% -3.1% 0.53 ± 1% will-it-scale.scalability
1400 ± 30% +174.5% 3842 ± 34% sched_debug.cpu#36.nr_switches
810 ± 33% +154.2% 2060 ± 25% sched_debug.cpu#36.ttwu_count
163 ± 41% +96.6% 320 ± 42% sched_debug.cpu#2.ttwu_local
242 ± 38% +71.4% 416 ± 19% slabinfo.blkdev_queue.active_objs
137 ± 28% +99.3% 274 ± 22% sched_debug.cpu#26.ttwu_local
29 ± 44% +116.0% 63 ± 28% sched_debug.cfs_rq[50]:/.tg_load_contrib
1296 ± 34% +41.5% 1835 ± 19% sched_debug.cpu#63.ttwu_local
405 ± 30% -42.3% 234 ± 15% sched_debug.cpu#56.sched_goidle
314 ± 27% +43.6% 452 ± 11% slabinfo.blkdev_queue.num_objs
980 ± 28% -37.7% 611 ± 13% sched_debug.cpu#56.nr_switches
684 ± 25% +40.5% 962 ± 20% sched_debug.cpu#10.ttwu_count
1.03 ± 2% -38.8% 0.63 ± 7% perf-profile.cpu-cycles.current_kernel_time.file_update_time.__generic_file_write_iter.generic_file_write_iter.new_sync_write
838 ± 25% -33.1% 560 ± 14% sched_debug.cpu#60.nr_switches
4870 ± 19% +25.8% 6127 ± 14% sched_debug.cpu#63.nr_switches
1443 ± 10% +39.9% 2019 ± 23% sched_debug.cpu#2.sched_count
39 ± 20% +55.1% 61 ± 16% latency_stats.max.call_rwsem_down_write_failed.SyS_mprotect.system_call_fastpath
336 ± 33% -37.8% 209 ± 12% sched_debug.cpu#60.sched_goidle
2.27 ± 12% -33.6% 1.51 ± 2% perf-profile.cpu-cycles.rw_verify_area.vfs_write.sys_pwrite64.system_call_fastpath.__libc_pwrite
394 ± 19% -31.5% 270 ± 13% sched_debug.cpu#52.sched_goidle
986 ± 19% -25.0% 740 ± 11% sched_debug.cpu#52.nr_switches
2.25 ± 4% -28.4% 1.61 ± 6% perf-profile.cpu-cycles.security_file_permission.rw_verify_area.vfs_write.sys_pwrite64.system_call_fastpath
257 ± 15% +52.9% 394 ± 28% sched_debug.cpu#10.ttwu_local
1.24 ± 10% -26.7% 0.91 ± 8% perf-profile.cpu-cycles.selinux_file_permission.security_file_permission.rw_verify_area.vfs_write.sys_pwrite64
1.12 ± 6% -27.7% 0.81 ± 8% perf-profile.cpu-cycles.rw_verify_area.vfs_write.sys_pwrite64.system_call_fastpath.__libc_pwrite64
3385 ± 10% +8.9% 3687 ± 8% sched_debug.cpu#39.curr->pid
4.01 ± 0% +27.4% 5.11 ± 1% perf-profile.cpu-cycles.file_update_time.__generic_file_write_iter.generic_file_write_iter.new_sync_write.vfs_write
1.05 ± 2% -23.8% 0.80 ± 5% perf-profile.cpu-cycles.iov_iter_fault_in_readable.__generic_file_write_iter.generic_file_write_iter.new_sync_write.vfs_write
0.83 ± 3% +24.7% 1.03 ± 1% perf-profile.cpu-cycles.current_fs_time.file_update_time.__generic_file_write_iter.generic_file_write_iter.new_sync_write
0.88 ± 2% +15.2% 1.02 ± 2% perf-profile.cpu-cycles.__sb_end_write.vfs_write.sys_pwrite64.system_call_fastpath.__libc_pwrite64
0.99 ± 1% +14.5% 1.14 ± 1% perf-profile.cpu-cycles.system_call.__libc_pwrite
2.60 ± 2% +11.7% 2.91 ± 0% perf-profile.cpu-cycles.__srcu_read_lock.fsnotify.vfs_write.sys_pwrite64.system_call_fastpath
3.56 ± 6% +12.4% 4.00 ± 4% perf-profile.cpu-cycles.unlock_page.shmem_write_end.generic_perform_write.__generic_file_write_iter.generic_file_write_iter
252 ± 0% +7.8% 272 ± 1% time.user_time
lkp-nex05: Nehalem-EX
Memory: 192G
will-it-scale.per_process_ops
1.4e+06 ++--O--------------O---------------------------------------------+
1.38e+06 O+ O O |
| O |
1.36e+06 ++ O |
1.34e+06 ++ |
| |
1.32e+06 ++ O |
1.3e+06 ++ O O O |
1.28e+06 ++ O O O O O |
| O O
1.26e+06 ++ |
1.24e+06 ++ |
| |
1.22e+06 ++ .*...*...*...*...*...*..* |
1.2e+06 *+--*---*--------------------------------------------------------+
will-it-scale.per_thread_ops
1.32e+06 ++---------------------------------------------------------------+
1.3e+06 ++ O O O |
O O O |
1.28e+06 ++ O |
1.26e+06 ++ |
| |
1.24e+06 ++ |
1.22e+06 ++ O O O |
1.2e+06 ++ O O O O O O O O
| |
1.18e+06 ++ |
1.16e+06 ++ |
| ..*... |
1.14e+06 *+.. .*...*...*...*. *..* |
1.12e+06 ++--*---*--------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
To reproduce:
apt-get install ruby ruby-oj
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/setup-local job.yaml # the job file attached in this email
bin/run-local job.yaml
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,
Huang, Ying
View attachment "job.yaml" of type "text/plain" (1491 bytes)
View attachment "reproduce" of type "text/plain" (4767 bytes)
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