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Date: Wed, 15 Dec 2021 21:58:03 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc: Jens Axboe <axboe@...nel.dk>,
kernel test robot <oliver.sang@...el.com>,
Christoph Hellwig <hch@....de>,
Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
lkp@...el.com, ying.huang@...el.com, feng.tang@...el.com,
zhengjun.xing@...ux.intel.com, fengwei.yin@...el.com
Subject: [loop] e3f9387aea: stress-ng.loop.ops_per_sec 78.9% improvement
Greeting,
FYI, we noticed a 78.9% improvement of stress-ng.loop.ops_per_sec due to commit:
commit: e3f9387aea67742b9d1f4de8e5bb2fd08a8a4584 ("loop: Use pr_warn_once() for loop_control_remove() warning")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: stress-ng
on test machine: 96 threads 2 sockets Ice Lake with 256G memory
with following parameters:
nr_threads: 100%
disk: 1HDD
testtime: 60s
class: device
test: loop
cpufreq_governor: performance
ucode: 0xb000280
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
sudo bin/lkp install job.yaml # job file is attached in this email
bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
sudo bin/lkp run generated-yaml-file
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
=========================================================================================
class/compiler/cpufreq_governor/disk/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime/ucode:
device/gcc-9/performance/1HDD/x86_64-rhel-8.3/100%/debian-10.4-x86_64-20200603.cgz/lkp-icl-2sp1/loop/stress-ng/60s/0xb000280
commit:
d422f40163 ("zram: only make zram_wb_devops for CONFIG_ZRAM_WRITEBACK")
e3f9387aea ("loop: Use pr_warn_once() for loop_control_remove() warning")
d422f40163087408 e3f9387aea67742b9d1f4de8e5b
---------------- ---------------------------
%stddev %change %stddev
\ | \
3361 +79.7% 6041 ± 2% stress-ng.loop.ops
55.12 +78.9% 98.63 stress-ng.loop.ops_per_sec
4244 +61.3% 6847 ± 2% stress-ng.time.involuntary_context_switches
140.71 ± 2% +25.1% 176.00 ± 11% stress-ng.time.percent_of_cpu_this_job_got
90.04 ± 2% +24.7% 112.27 ± 12% stress-ng.time.system_time
152534 ± 8% +38.8% 211722 ± 13% stress-ng.time.voluntary_context_switches
8000 ± 4% +20.0% 9598 ± 13% meminfo.Active
7396 ± 3% +20.8% 8933 ± 14% meminfo.Active(anon)
1.78 ± 4% +0.5 2.30 ± 9% mpstat.cpu.all.sys%
0.36 ± 2% +0.1 0.50 ± 6% mpstat.cpu.all.usr%
61315 ± 2% +29.6% 79471 ± 4% turbostat.C1
0.05 +0.0 0.08 ± 11% turbostat.C1%
3804 ± 3% +56.8% 5965 ± 6% vmstat.io.bi
17445 ± 4% +40.1% 24441 ± 6% vmstat.system.cs
30900 ± 2% +56.3% 48285 ± 6% softirqs.BLOCK
10068 ± 8% -14.0% 8663 ± 11% softirqs.CPU15.SCHED
9690 ± 4% -10.3% 8692 ± 8% softirqs.CPU32.SCHED
9637 ± 7% -14.8% 8207 ± 11% softirqs.CPU52.SCHED
9340 ± 10% -14.3% 8007 ± 6% softirqs.CPU72.SCHED
9936 ± 8% -14.4% 8506 ± 11% softirqs.CPU82.SCHED
9724 ± 9% -12.5% 8510 ± 10% softirqs.CPU93.SCHED
207351 ± 9% +24.3% 257838 ± 8% softirqs.RCU
1844 ± 3% +21.1% 2233 ± 14% proc-vmstat.nr_active_anon
5929 ± 4% +9.3% 6479 ± 3% proc-vmstat.nr_page_table_pages
1844 ± 3% +21.1% 2233 ± 14% proc-vmstat.nr_zone_active_anon
645257 +14.3% 737465 ± 3% proc-vmstat.numa_hit
554490 +16.5% 645922 ± 3% proc-vmstat.numa_local
27004 +56.1% 42164 ± 4% proc-vmstat.pgactivate
682350 +17.4% 800875 ± 3% proc-vmstat.pgalloc_normal
579709 +20.2% 696873 ± 3% proc-vmstat.pgfree
261468 ± 3% +54.9% 404974 ± 7% proc-vmstat.pgpgin
30452 ± 4% +48.5% 45231 ± 11% proc-vmstat.unevictable_pgs_culled
1.351e+09 ± 8% +22.3% 1.651e+09 ± 4% perf-stat.i.branch-instructions
21750 ± 8% +30.1% 28299 ± 8% perf-stat.i.context-switches
903.42 ± 10% +37.4% 1241 ± 9% perf-stat.i.cpu-migrations
1.463e+09 ± 8% +22.8% 1.796e+09 ± 4% perf-stat.i.dTLB-loads
6.545e+08 ± 7% +22.0% 7.983e+08 ± 4% perf-stat.i.dTLB-stores
6.28e+09 ± 8% +20.9% 7.595e+09 ± 4% perf-stat.i.instructions
0.38 ± 6% +14.1% 0.43 ± 8% perf-stat.i.ipc
24.95 ± 7% -15.6% 21.06 ± 9% perf-stat.i.major-faults
32.26 ± 7% +29.9% 41.91 ± 3% perf-stat.i.metric.M/sec
986939 ± 7% +33.0% 1312402 ± 6% perf-stat.i.node-load-misses
320022 ± 7% +34.4% 430212 ± 4% perf-stat.i.node-loads
1097382 ± 7% +39.2% 1527172 ± 11% perf-stat.i.node-store-misses
1.068e+09 ± 2% +31.8% 1.408e+09 ± 4% perf-stat.ps.branch-instructions
6396422 ± 8% +29.6% 8290131 ± 5% perf-stat.ps.cache-misses
17520 ± 4% +41.0% 24709 ± 7% perf-stat.ps.context-switches
1.412e+10 ± 7% +13.9% 1.609e+10 ± 6% perf-stat.ps.cpu-cycles
732.74 ± 4% +48.3% 1086 ± 7% perf-stat.ps.cpu-migrations
1.162e+09 ± 2% +32.4% 1.539e+09 ± 3% perf-stat.ps.dTLB-loads
5.203e+08 +31.1% 6.821e+08 ± 3% perf-stat.ps.dTLB-stores
4.946e+09 ± 2% +30.6% 6.458e+09 ± 3% perf-stat.ps.instructions
838233 ± 7% +40.1% 1174167 ± 5% perf-stat.ps.node-load-misses
258560 ± 2% +44.7% 374131 perf-stat.ps.node-loads
874444 ± 9% +49.8% 1310136 ± 7% perf-stat.ps.node-store-misses
987545 ± 9% +25.4% 1238042 ± 8% perf-stat.ps.node-stores
3.284e+11 +29.0% 4.238e+11 ± 4% perf-stat.total.instructions
36.05 ± 11% -9.1 26.95 ± 18% perf-profile.calltrace.cycles-pp.secondary_startup_64_no_verify
35.61 ± 10% -8.9 26.66 ± 18% perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary.secondary_startup_64_no_verify
35.61 ± 10% -8.9 26.66 ± 18% perf-profile.calltrace.cycles-pp.start_secondary.secondary_startup_64_no_verify
35.55 ± 10% -8.9 26.62 ± 18% perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64_no_verify
31.96 ± 10% -8.4 23.53 ± 18% perf-profile.calltrace.cycles-pp.cpuidle_enter_state.cpuidle_enter.do_idle.cpu_startup_entry.start_secondary
32.49 ± 9% -8.3 24.19 ± 18% perf-profile.calltrace.cycles-pp.cpuidle_enter.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64_no_verify
8.21 ± 77% -8.2 0.00 perf-profile.calltrace.cycles-pp._printk.loop_control_ioctl.cold.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe
8.21 ± 77% -8.2 0.00 perf-profile.calltrace.cycles-pp.vprintk_emit._printk.loop_control_ioctl.cold.__x64_sys_ioctl.do_syscall_64
8.21 ± 77% -8.2 0.00 perf-profile.calltrace.cycles-pp.loop_control_ioctl.cold.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
7.66 ± 81% -7.7 0.00 perf-profile.calltrace.cycles-pp.console_unlock.vprintk_emit._printk.loop_control_ioctl.cold.__x64_sys_ioctl
7.28 ± 81% -7.3 0.00 perf-profile.calltrace.cycles-pp.serial8250_console_write.console_unlock.vprintk_emit._printk.loop_control_ioctl.cold
19.03 ± 6% -4.7 14.35 ± 17% perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.cpuidle_enter.do_idle.cpu_startup_entry
0.71 ± 8% -0.4 0.32 ± 86% perf-profile.calltrace.cycles-pp.rebalance_domains.__softirqentry_text_start.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
1.12 ± 22% -0.4 0.76 ± 25% perf-profile.calltrace.cycles-pp.scheduler_tick.update_process_times.tick_sched_handle.tick_sched_timer.__hrtimer_run_queues
1.23 ± 17% +3.2 4.45 ±107% perf-profile.calltrace.cycles-pp.kernfs_remove.__kobject_del.kobject_del.blk_mq_unregister_hctx.blk_mq_unregister_dev
1.31 ± 17% +3.2 4.54 ±105% perf-profile.calltrace.cycles-pp.__kobject_del.kobject_del.blk_mq_unregister_hctx.blk_mq_unregister_dev.blk_unregister_queue
1.32 ± 17% +3.2 4.55 ±104% perf-profile.calltrace.cycles-pp.kobject_del.blk_mq_unregister_hctx.blk_mq_unregister_dev.blk_unregister_queue.del_gendisk
36.05 ± 11% -9.1 26.95 ± 18% perf-profile.children.cycles-pp.secondary_startup_64_no_verify
36.05 ± 11% -9.1 26.95 ± 18% perf-profile.children.cycles-pp.cpu_startup_entry
36.04 ± 11% -9.1 26.95 ± 18% perf-profile.children.cycles-pp.do_idle
35.61 ± 10% -8.9 26.66 ± 18% perf-profile.children.cycles-pp.start_secondary
32.91 ± 10% -8.4 24.47 ± 18% perf-profile.children.cycles-pp.cpuidle_enter
32.87 ± 10% -8.4 24.44 ± 18% perf-profile.children.cycles-pp.cpuidle_enter_state
8.21 ± 77% -8.2 0.00 perf-profile.children.cycles-pp.loop_control_ioctl.cold
19.26 ± 6% -4.7 14.52 ± 17% perf-profile.children.cycles-pp.intel_idle
1.18 ± 22% -0.4 0.82 ± 23% perf-profile.children.cycles-pp.scheduler_tick
0.73 ± 8% -0.2 0.50 ± 20% perf-profile.children.cycles-pp.rebalance_domains
0.60 ± 12% -0.2 0.44 ± 15% perf-profile.children.cycles-pp.native_irq_return_iret
0.43 ± 8% -0.1 0.31 ± 15% perf-profile.children.cycles-pp.lapic_next_deadline
0.39 ± 7% -0.1 0.29 ± 21% perf-profile.children.cycles-pp.read_tsc
0.26 ± 11% -0.1 0.18 ± 22% perf-profile.children.cycles-pp.arch_scale_freq_tick
0.29 ± 7% -0.1 0.22 ± 17% perf-profile.children.cycles-pp.native_apic_msr_eoi_write
0.10 ± 11% -0.0 0.06 ± 44% perf-profile.children.cycles-pp.call_cpuidle
0.09 ± 11% -0.0 0.06 ± 43% perf-profile.children.cycles-pp.schedule_timeout
0.22 ± 24% +0.4 0.64 ± 84% perf-profile.children.cycles-pp.device_add
0.67 ± 22% +0.7 1.38 ± 60% perf-profile.children.cycles-pp.kernfs_add_one
1.81 ± 17% +1.0 2.81 ± 27% perf-profile.children.cycles-pp.device_add_disk
1.32 ± 17% +3.2 4.55 ±104% perf-profile.children.cycles-pp.blk_mq_unregister_hctx
1.38 ± 16% +3.2 4.62 ±102% perf-profile.children.cycles-pp.blk_mq_unregister_dev
1.50 ± 18% +3.3 4.81 ±100% perf-profile.children.cycles-pp.kernfs_remove
1.57 ± 17% +3.3 4.90 ± 98% perf-profile.children.cycles-pp.blk_unregister_queue
1.61 ± 17% +3.4 5.05 ± 98% perf-profile.children.cycles-pp.kobject_del
2.38 ± 20% +6.7 9.05 ±115% perf-profile.children.cycles-pp.rwsem_down_write_slowpath
2.38 ± 17% +7.1 9.50 ±129% perf-profile.children.cycles-pp.del_gendisk
19.24 ± 6% -4.7 14.51 ± 17% perf-profile.self.cycles-pp.intel_idle
1.69 ± 9% -0.5 1.22 ± 17% perf-profile.self.cycles-pp.cpuidle_enter_state
0.60 ± 12% -0.2 0.44 ± 15% perf-profile.self.cycles-pp.native_irq_return_iret
0.43 ± 8% -0.1 0.31 ± 15% perf-profile.self.cycles-pp.lapic_next_deadline
0.38 ± 7% -0.1 0.28 ± 21% perf-profile.self.cycles-pp.read_tsc
0.26 ± 12% -0.1 0.17 ± 21% perf-profile.self.cycles-pp.arch_scale_freq_tick
0.29 ± 6% -0.1 0.22 ± 19% perf-profile.self.cycles-pp.native_apic_msr_eoi_write
0.09 ± 9% -0.0 0.06 ± 44% perf-profile.self.cycles-pp.call_cpuidle
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.
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation
Thanks,
Oliver Sang
View attachment "config-5.16.0-rc1-00023-ge3f9387aea67" of type "text/plain" (173517 bytes)
View attachment "job-script" of type "text/plain" (8304 bytes)
View attachment "job.yaml" of type "text/plain" (5671 bytes)
View attachment "reproduce" of type "text/plain" (337 bytes)
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