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Date: Fri, 13 Feb 2015 13:37:12 +0800
From: Huang Ying <ying.huang@...el.com>
To: Will Deacon <will.deacon@....com>
Cc: LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [mmu_gather] fb7332a9fed: +5.4%
tlbflush.mem_acc_time_thread_ms -6.2% will-it-scale.per_thread_ops
FYI, we noticed the below changes on
commit fb7332a9fedfd62b1ba6530c86f39f0fa38afd49 ("mmu_gather: move minimal range calculations into generic code")
testbox/testcase/testparams: ivb42/will-it-scale/performance-brk1
63648dd20fa0780a fb7332a9fedfd62b1ba6530c86
---------------- --------------------------
%stddev %change %stddev
\ | \
733067 ± 0% -6.2% 687433 ± 0% will-it-scale.per_thread_ops
3728462 ± 0% -5.7% 3516927 ± 0% will-it-scale.per_process_ops
0.46 ± 0% -3.3% 0.44 ± 0% will-it-scale.scalability
140435 ± 22% -75.2% 34877 ± 32% sched_debug.cpu#19.ttwu_count
85 ± 32% +144.6% 208 ± 30% sched_debug.cfs_rq[8]:/.blocked_load_avg
892437 ± 34% -55.5% 397177 ± 16% sched_debug.cpu#5.nr_switches
445593 ± 34% -55.5% 198460 ± 16% sched_debug.cpu#5.sched_goidle
92 ± 29% +136.7% 219 ± 29% sched_debug.cfs_rq[8]:/.tg_load_contrib
374967 ± 14% -56.3% 163891 ± 35% sched_debug.cpu#5.ttwu_count
924309 ± 32% -51.0% 452960 ± 9% sched_debug.cpu#5.sched_count
90 ± 41% +78.2% 161 ± 18% sched_debug.cfs_rq[30]:/.tg_load_contrib
205529 ± 15% -38.3% 126863 ± 32% sched_debug.cpu#40.ttwu_count
1152 ± 33% +50.4% 1734 ± 22% sched_debug.cpu#13.ttwu_local
3.44 ± 38% +86.6% 6.42 ± 18% perf-profile.cpu-cycles.rwsem_spin_on_owner.rwsem_down_write_failed.call_rwsem_down_write_failed.sys_brk.system_call_fastpath
6 ± 39% +100.0% 13 ± 9% sched_debug.cpu#2.cpu_load[0]
1.03 ± 11% +46.6% 1.52 ± 12% perf-profile.cpu-cycles.find_vma.do_munmap.sys_brk.system_call_fastpath.brk
0.76 ± 32% +65.2% 1.26 ± 14% perf-profile.cpu-cycles.up_write.vma_adjust.vma_merge.do_brk.sys_brk
538886 ± 38% +70.3% 917481 ± 20% sched_debug.cpu#26.ttwu_count
0.76 ± 21% +69.6% 1.28 ± 14% perf-profile.cpu-cycles.find_vma.sys_brk.system_call_fastpath.brk
16 ± 5% +25.8% 20 ± 18% sched_debug.cpu#30.cpu_load[1]
2224 ± 11% +21.8% 2709 ± 16% sched_debug.cpu#41.curr->pid
3.94 ± 9% -30.5% 2.74 ± 17% perf-profile.cpu-cycles._raw_spin_lock.try_to_wake_up.wake_up_process.__rwsem_do_wake.rwsem_wake
28 ± 14% -32.1% 19 ± 14% sched_debug.cfs_rq[25]:/.load
16 ± 4% +25.0% 20 ± 12% sched_debug.cpu#32.cpu_load[2]
17 ± 16% +20.3% 20 ± 10% sched_debug.cfs_rq[34]:/.runnable_load_avg
180505 ± 26% -43.4% 102128 ± 18% sched_debug.cpu#44.ttwu_count
2135 ± 7% +28.7% 2747 ± 22% sched_debug.cpu#44.curr->pid
13.14 ± 10% +20.4% 15.82 ± 5% perf-profile.cpu-cycles.call_rwsem_down_write_failed.sys_brk.system_call_fastpath.brk
13.05 ± 10% +20.4% 15.71 ± 5% perf-profile.cpu-cycles.rwsem_down_write_failed.call_rwsem_down_write_failed.sys_brk.system_call_fastpath.brk
2.30 ± 10% +24.1% 2.86 ± 7% perf-profile.cpu-cycles.vma_adjust.vma_merge.do_brk.sys_brk.system_call_fastpath
1.70 ± 6% -13.2% 1.47 ± 11% perf-profile.cpu-cycles.clockevents_program_event.tick_program_event.__hrtimer_start_range_ns.hrtimer_start_range_ns.tick_nohz_restart
5512 ± 1% +27.7% 7040 ± 22% sched_debug.cfs_rq[20]:/.exec_clock
17 ± 5% -30.9% 11 ± 32% sched_debug.cpu#40.load
2.73 ± 9% +21.0% 3.30 ± 7% perf-profile.cpu-cycles.vma_merge.do_brk.sys_brk.system_call_fastpath.brk
505131 ± 13% +26.4% 638526 ± 7% sched_debug.cpu#32.ttwu_count
1.09 ± 7% -14.9% 0.93 ± 11% perf-profile.cpu-cycles._raw_spin_unlock_irqrestore.rwsem_wake.call_rwsem_wake.sys_brk.system_call_fastpath
16 ± 2% +13.8% 18 ± 8% sched_debug.cpu#32.cpu_load[3]
1.73 ± 6% -12.5% 1.52 ± 11% perf-profile.cpu-cycles.tick_program_event.__hrtimer_start_range_ns.hrtimer_start_range_ns.tick_nohz_restart.tick_nohz_idle_exit
1.89 ± 5% -12.2% 1.66 ± 1% perf-profile.cpu-cycles.set_next_entity.pick_next_task_fair.__sched_text_start.schedule_preempt_disabled.cpu_startup_entry
17.50 ± 5% -14.4% 14.98 ± 6% perf-profile.cpu-cycles.try_to_wake_up.wake_up_process.__rwsem_do_wake.rwsem_wake.call_rwsem_wake
18.55 ± 5% -13.8% 16.00 ± 6% perf-profile.cpu-cycles.wake_up_process.__rwsem_do_wake.rwsem_wake.call_rwsem_wake.sys_brk
229 ± 6% -10.5% 205 ± 0% sched_debug.cfs_rq[2]:/.tg_runnable_contrib
10557 ± 6% -10.2% 9478 ± 0% sched_debug.cfs_rq[2]:/.avg->runnable_avg_sum
18.66 ± 5% -13.4% 16.16 ± 5% perf-profile.cpu-cycles.__rwsem_do_wake.rwsem_wake.call_rwsem_wake.sys_brk.system_call_fastpath
745968 ± 4% +9.1% 813977 ± 5% sched_debug.cpu#10.avg_idle
3.53 ± 2% +13.0% 3.98 ± 5% perf-profile.cpu-cycles.unmap_region.do_munmap.sys_brk.system_call_fastpath.brk
738761 ± 5% +13.5% 838441 ± 3% sched_debug.cpu#2.avg_idle
21.09 ± 5% -13.4% 18.27 ± 6% perf-profile.cpu-cycles.rwsem_wake.call_rwsem_wake.sys_brk.system_call_fastpath.brk
16 ± 6% +12.1% 18 ± 2% sched_debug.cpu#29.cpu_load[2]
21.21 ± 5% -13.2% 18.40 ± 6% perf-profile.cpu-cycles.call_rwsem_wake.sys_brk.system_call_fastpath.brk
11.09 ± 3% +11.3% 12.35 ± 2% perf-profile.cpu-cycles.do_munmap.sys_brk.system_call_fastpath.brk
678615 ± 4% +7.4% 728663 ± 3% sched_debug.cpu#25.avg_idle
2757 ± 5% -7.4% 2551 ± 2% sched_debug.cpu#25.curr->pid
885 ± 11% +22.0% 1080 ± 11% slabinfo.RAW.num_objs
885 ± 11% +22.0% 1080 ± 11% slabinfo.RAW.active_objs
2528 ± 3% +4.7% 2647 ± 5% sched_debug.cpu#35.curr->pid
230 ± 4% -10.0% 207 ± 1% sched_debug.cfs_rq[8]:/.tg_runnable_contrib
testbox/testcase/testparams: lkp-t410/tlbflush/performance-200%-32x-512
63648dd20fa0780a fb7332a9fedfd62b1ba6530c86
---------------- --------------------------
113 ± 0% -5.5% 107 ± 0% tlbflush.mem_acc_cost_ns_time
8758 ± 0% +5.4% 9227 ± 0% tlbflush.mem_acc_time_thread_ms
3314 ± 11% -21.2% 2610 ± 15% slabinfo.anon_vma.num_objs
ivb42: Ivytown Ivy Bridge-EP
Memory: 64G
lkp-t410: Westmere
Memory: 2G
tlbflush.mem_acc_time_thread_ms
9300 ++-O-------------------O--------O-------------------O----------------O
| O O O O O |
9200 O+ O O O O O O O O O O O O |
9100 ++ O |
| |
9000 ++ O |
| |
8900 ++ .* |
| * .*.. * *. + |
8800 ++. + .*..* *. + + .. + .*.. .*.. |
8700 *+ + .* : : *.. + * *. *. * |
| *..*. : : * |
8600 ++ : : |
| * |
8500 ++-------------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
To reproduce:
apt-get install ruby
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,
Fengguang
View attachment "job.yaml" of type "text/plain" (1647 bytes)
View attachment "reproduce" of type "text/plain" (1020 bytes)
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