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Date: Sun, 3 Jan 2021 23:33:02 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Christoph Hellwig <hch@....de>
Cc: Jens Axboe <axboe@...nel.dk>, Hannes Reinecke <hare@...e.de>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
lkp@...el.com, ying.huang@...el.com, feng.tang@...el.com,
zhengjun.xing@...el.com
Subject: [loop] 3b4f85d02a: stress-ng.loop.ops_per_sec -42.1% regression
Greeting,
FYI, we noticed a -42.1% regression of stress-ng.loop.ops_per_sec due to commit:
commit: 3b4f85d02a4bd85cbea999a064235a47694bbb7b ("loop: let set_capacity_revalidate_and_notify update the bdev size")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: stress-ng
on test machine: 48 threads Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz with 112G memory
with following parameters:
nr_threads: 100%
disk: 1HDD
testtime: 30s
class: device
cpufreq_governor: performance
ucode: 0x42e
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
=========================================================================================
class/compiler/cpufreq_governor/disk/kconfig/nr_threads/rootfs/tbox_group/testcase/testtime/ucode:
device/gcc-9/performance/1HDD/x86_64-rhel-8.3/100%/debian-10.4-x86_64-20200603.cgz/lkp-ivb-2ep1/stress-ng/30s/0x42e
commit:
99473d9db9 ("block: remove the call to __invalidate_device in check_disk_size_change")
3b4f85d02a ("loop: let set_capacity_revalidate_and_notify update the bdev size")
99473d9db93a3bf5 3b4f85d02a4bd85cbea999a0642
---------------- ---------------------------
fail:runs %reproduction fail:runs
| | |
1:4 -25% :4 kmsg.debugfs:Directory'loop#'with_parent'block'already_present
%stddev %change %stddev
\ | \
692.75 ± 11% -41.9% 402.75 ± 6% stress-ng.loop.ops
22.52 ± 11% -42.1% 13.03 ± 5% stress-ng.loop.ops_per_sec
13959 ±125% +173.5% 38175 ± 17% numa-numastat.node1.other_node
6.059e+08 ± 11% -37.4% 3.79e+08 ± 53% cpuidle.C1E.time
43932 ± 36% -40.2% 26251 ± 41% cpuidle.POLL.usage
128964 ± 3% +15.6% 149048 meminfo.AnonHugePages
245566 ± 3% +12.4% 275979 ± 7% meminfo.AnonPages
10188 ± 4% -13.4% 8820 ± 6% softirqs.CPU19.SCHED
10973 ± 6% -14.3% 9403 ± 6% softirqs.CPU2.SCHED
7422 ± 7% -9.0% 6753 ± 2% numa-vmstat.node0.nr_kernel_stack
31118 ± 12% +28.5% 39987 ± 5% numa-vmstat.node1.nr_anon_pages
33253 ± 8% +27.3% 42337 ± 6% numa-vmstat.node1.nr_inactive_anon
33254 ± 8% +27.3% 42337 ± 6% numa-vmstat.node1.nr_zone_inactive_anon
51597 ± 4% -16.6% 43024 ± 3% slabinfo.kmalloc-8.active_objs
51597 ± 4% -16.6% 43024 ± 3% slabinfo.kmalloc-8.num_objs
11390 ± 4% -6.5% 10645 ± 4% slabinfo.proc_inode_cache.active_objs
9897 ± 3% +19.0% 11777 ± 11% slabinfo.vmap_area.active_objs
7411 ± 7% -9.0% 6747 ± 2% numa-meminfo.node0.KernelStack
133681 ± 4% -8.2% 122785 ± 2% numa-meminfo.node0.Slab
124467 ± 12% +28.4% 159827 ± 5% numa-meminfo.node1.AnonPages
159232 ± 11% +88.5% 300105 ± 30% numa-meminfo.node1.AnonPages.max
133328 ± 8% +27.2% 169583 ± 6% numa-meminfo.node1.Inactive
133043 ± 8% +27.4% 169517 ± 6% numa-meminfo.node1.Inactive(anon)
0.03 ± 30% -33.0% 0.02 ± 11% perf-sched.sch_delay.avg.ms.schedule_hrtimeout_range_clock.poll_schedule_timeout.constprop.0.do_select
0.03 ± 43% -33.6% 0.02 ± 3% perf-sched.sch_delay.max.ms.__x64_sys_pause.do_syscall_64.entry_SYSCALL_64_after_hwframe.[unknown]
0.03 ± 46% -39.1% 0.02 ± 11% perf-sched.sch_delay.max.ms.schedule_hrtimeout_range_clock.poll_schedule_timeout.constprop.0.do_select
45.50 ± 58% +56.6% 71.25 ± 2% perf-sched.wait_and_delay.count.preempt_schedule_common._cond_resched.__anon_vma_prepare.do_anonymous_page.__handle_mm_fault
0.33 ± 21% -59.4% 0.13 ± 29% perf-sched.wait_time.avg.ms.preempt_schedule_common._cond_resched.down_write_killable.vm_mmap_pgoff.ksys_mmap_pgoff
8.33 ± 34% -67.9% 2.68 ± 47% perf-sched.wait_time.max.ms.preempt_schedule_common._cond_resched.down_write_killable.vm_mmap_pgoff.ksys_mmap_pgoff
61412 ± 3% +12.1% 68867 ± 7% proc-vmstat.nr_anon_pages
66214 ± 2% +11.2% 73638 ± 6% proc-vmstat.nr_inactive_anon
66214 ± 2% +11.2% 73638 ± 6% proc-vmstat.nr_zone_inactive_anon
23919 ± 22% -21.4% 18797 ± 9% proc-vmstat.numa_hint_faults
1.101e+08 +1.3% 1.115e+08 proc-vmstat.pgalloc_normal
1.101e+08 +1.3% 1.114e+08 proc-vmstat.pgfree
3444 ± 2% -26.6% 2527 ± 6% proc-vmstat.unevictable_pgs_culled
1395072 +29.1% 1800768 ± 7% proc-vmstat.unevictable_pgs_scanned
2.50 ± 22% +0.8 3.25 ± 16% perf-profile.calltrace.cycles-pp.drm_atomic_helper_dirtyfb.drm_fb_helper_dirty_work.process_one_work.worker_thread.kthread
2.56 ± 22% +0.8 3.33 ± 16% perf-profile.calltrace.cycles-pp.drm_fb_helper_dirty_work.process_one_work.worker_thread.kthread.ret_from_fork
2.67 ± 20% +0.8 3.48 ± 16% perf-profile.calltrace.cycles-pp.process_one_work.worker_thread.kthread.ret_from_fork
2.72 ± 19% +0.8 3.53 ± 16% perf-profile.calltrace.cycles-pp.worker_thread.kthread.ret_from_fork
3.35 ± 18% +0.9 4.22 ± 10% perf-profile.calltrace.cycles-pp.ret_from_fork
3.34 ± 18% +0.9 4.21 ± 10% perf-profile.calltrace.cycles-pp.kthread.ret_from_fork
0.12 ± 20% +0.1 0.19 ± 32% perf-profile.children.cycles-pp.copy_pte_range
0.09 ± 40% +0.1 0.17 ± 46% perf-profile.children.cycles-pp.drm_atomic_get_plane_state
0.12 ± 14% +0.1 0.21 ± 40% perf-profile.children.cycles-pp.zap_pte_range
0.16 ± 17% +0.1 0.25 ± 36% perf-profile.children.cycles-pp.unmap_page_range
2.50 ± 22% +0.8 3.25 ± 16% perf-profile.children.cycles-pp.drm_atomic_helper_dirtyfb
2.56 ± 22% +0.8 3.33 ± 16% perf-profile.children.cycles-pp.drm_fb_helper_dirty_work
2.67 ± 20% +0.8 3.48 ± 16% perf-profile.children.cycles-pp.process_one_work
2.72 ± 19% +0.8 3.53 ± 16% perf-profile.children.cycles-pp.worker_thread
3.34 ± 18% +0.9 4.21 ± 10% perf-profile.children.cycles-pp.kthread
3.35 ± 18% +0.9 4.23 ± 10% perf-profile.children.cycles-pp.ret_from_fork
0.07 ± 17% +0.1 0.12 ± 38% perf-profile.self.cycles-pp.copy_pte_range
7.644e+09 +3.0% 7.871e+09 perf-stat.i.branch-instructions
1.97 ± 4% -0.4 1.58 ± 7% perf-stat.i.branch-miss-rate%
45318734 +6.3% 48178048 ± 3% perf-stat.i.branch-misses
1.694e+08 +2.2% 1.73e+08 perf-stat.i.cache-references
7.529e+09 +2.5% 7.72e+09 perf-stat.i.dTLB-loads
3.105e+09 +3.3% 3.208e+09 perf-stat.i.dTLB-stores
3.075e+10 +2.6% 3.156e+10 perf-stat.i.instructions
19679 -12.4% 17243 ± 17% perf-stat.i.instructions-per-iTLB-miss
0.48 ± 8% +23.3% 0.60 ± 2% perf-stat.i.metric.K/sec
385.31 +2.8% 396.25 perf-stat.i.metric.M/sec
39.32 +1.5 40.79 ± 2% perf-stat.i.node-store-miss-rate%
0.30 +3.0% 0.31 perf-stat.overall.ipc
7.577e+09 +3.1% 7.809e+09 perf-stat.ps.branch-instructions
45160627 +6.2% 47948462 ± 3% perf-stat.ps.branch-misses
3.072e+09 +3.3% 3.173e+09 perf-stat.ps.dTLB-stores
3.051e+10 +2.7% 3.133e+10 perf-stat.ps.instructions
5.64e+12 +2.9% 5.803e+12 perf-stat.total.instructions
10782 ± 20% -22.0% 8409 ± 18% interrupts.CPU1.CAL:Function_call_interrupts
521.75 ± 8% +54.4% 805.75 ± 23% interrupts.CPU10.RES:Rescheduling_interrupts
10321 ± 2% -14.4% 8833 ± 14% interrupts.CPU14.TLB:TLB_shootdowns
3912 ± 18% -36.5% 2485 ± 14% interrupts.CPU2.NMI:Non-maskable_interrupts
3912 ± 18% -36.5% 2485 ± 14% interrupts.CPU2.PMI:Performance_monitoring_interrupts
382.75 ± 8% +404.0% 1929 ±115% interrupts.CPU21.RES:Rescheduling_interrupts
4267 ± 6% -18.7% 3471 ± 19% interrupts.CPU23.NMI:Non-maskable_interrupts
4267 ± 6% -18.7% 3471 ± 19% interrupts.CPU23.PMI:Performance_monitoring_interrupts
462.25 ± 13% +52.6% 705.25 ± 20% interrupts.CPU24.RES:Rescheduling_interrupts
490.50 ± 4% +18.3% 580.50 ± 10% interrupts.CPU27.RES:Rescheduling_interrupts
459.00 ± 5% +254.8% 1628 ± 86% interrupts.CPU30.RES:Rescheduling_interrupts
443.50 ± 2% +79.3% 795.00 ± 35% interrupts.CPU35.RES:Rescheduling_interrupts
531.25 ± 6% +58.5% 842.00 ± 31% interrupts.CPU4.RES:Rescheduling_interrupts
2176 ± 9% +75.8% 3825 ± 19% interrupts.CPU40.NMI:Non-maskable_interrupts
2176 ± 9% +75.8% 3825 ± 19% interrupts.CPU40.PMI:Performance_monitoring_interrupts
16157 ± 72% -51.5% 7832 ± 9% interrupts.CPU43.CAL:Function_call_interrupts
17624 ± 52% -44.9% 9710 ± 13% interrupts.CPU44.TLB:TLB_shootdowns
389.00 ± 15% +124.7% 874.25 ± 77% interrupts.CPU47.RES:Rescheduling_interrupts
533.50 ± 11% +37.5% 733.75 ± 16% interrupts.CPU5.RES:Rescheduling_interrupts
496.75 ± 7% +161.6% 1299 ± 77% interrupts.CPU7.RES:Rescheduling_interrupts
2794 ± 32% +57.4% 4400 ± 12% interrupts.CPU9.NMI:Non-maskable_interrupts
2794 ± 32% +57.4% 4400 ± 12% interrupts.CPU9.PMI:Performance_monitoring_interrupts
stress-ng.loop.ops_per_sec
30 +----------------------------------------------------------------------+
| |
25 |-+ +.. +..+ |
| +.. .+ : : + + +.|
|.+..+.+..+ + + : : +.+.. +.. : +.+.. .+..+ + : + |
20 |-+ : + : .+ + : + + + : + |
| : : +. + + + + |
15 |-+ : : O |
| O O O O: :O O O O O O O O O O O O O |
10 |-+ :O : O |
| : : |
| : : |
5 |-+ :: |
| : |
0 +----------------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
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,
Oliver Sang
View attachment "config-5.10.0-rc4-00031-g3b4f85d02a4b" of type "text/plain" (171021 bytes)
View attachment "job-script" of type "text/plain" (7994 bytes)
View attachment "job.yaml" of type "text/plain" (5584 bytes)
View attachment "reproduce" of type "text/plain" (392 bytes)
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