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Message-ID: <20210209054925.GB13872@xsang-OptiPlex-9020>
Date: Tue, 9 Feb 2021 13:49:25 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Petr Mladek <pmladek@...e.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Vineet Gupta <vgupta@...opsys.com>,
Thomas Meyer <thomas@...3r.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
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: [init/console] a91bd6223e: unixbench.score -5.9% regression
Greeting,
FYI, we noticed a -5.9% regression of unixbench.score due to commit:
commit: a91bd6223ecd46addc71ee6fcd432206d39365d2 ("Revert "init/console: Use ttynull as a fallback when there is no console"")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: unixbench
on test machine: 16 threads Intel(R) Xeon(R) E-2278G CPU @ 3.40GHz with 32G memory
with following parameters:
runtime: 300s
nr_task: 30%
test: dhry2reg
cpufreq_governor: performance
ucode: 0xde
test-description: UnixBench is the original BYTE UNIX benchmark suite aims to test performance of Unix-like system.
test-url: https://github.com/kdlucas/byte-unixbench
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 split-job --compatible job.yaml
bin/lkp run compatible-job.yaml
=========================================================================================
compiler/cpufreq_governor/kconfig/nr_task/rootfs/runtime/tbox_group/test/testcase/ucode:
gcc-9/performance/x86_64-rhel-8.3/30%/debian-10.4-x86_64-20200603.cgz/300s/lkp-cfl-e1/dhry2reg/unixbench/0xde
commit:
c4cc3b1de3 ("Merge tag 'gcc-plugins-v5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux")
a91bd6223e ("Revert "init/console: Use ttynull as a fallback when there is no console"")
c4cc3b1de31b76f4 a91bd6223ecd46addc71ee6fcd4
---------------- ---------------------------
fail:runs %reproduction fail:runs
| | |
0:4 2% 0:4 perf-profile.children.cycles-pp.error_entry
%stddev %change %stddev
\ | \
19487 -5.9% 18336 unixbench.score
8.875e+10 -5.9% 8.351e+10 unixbench.workload
0.50 +0.1 0.61 ± 3% mpstat.cpu.all.irq%
44280 ± 4% +15.9% 51322 ± 3% softirqs.CPU0.SCHED
29624 ± 3% +9.6% 32476 vmstat.system.in
2.711e+08 ± 52% -98.6% 3760693 ± 83% cpuidle.C1.time
960301 ± 15% -98.0% 19480 ± 51% cpuidle.C1.usage
4.015e+08 ± 47% -70.6% 1.181e+08 ± 23% cpuidle.C1E.time
6356038 ± 12% -69.8% 1917995 ± 72% cpuidle.C3.usage
3.359e+09 ± 12% +30.3% 4.378e+09 ± 8% cpuidle.C6.time
4237110 ± 16% +73.6% 7357532 ± 16% cpuidle.C6.usage
1442441 ±147% -91.1% 127672 ± 3% cpuidle.POLL.time
211.25 ± 12% -14.7% 180.24 ± 16% sched_debug.cfs_rq:/.load_avg.stddev
12.81 ± 45% -68.4% 4.04 ±143% sched_debug.cfs_rq:/.removed.runnable_avg.avg
36.99 ± 48% -63.2% 13.61 ±139% sched_debug.cfs_rq:/.removed.runnable_avg.stddev
12.81 ± 45% -68.5% 4.04 ±143% sched_debug.cfs_rq:/.removed.util_avg.avg
36.99 ± 48% -63.2% 13.60 ±139% sched_debug.cfs_rq:/.removed.util_avg.stddev
2207 ±1927% +3559.5% 80796 ± 18% sched_debug.cfs_rq:/.spread0.avg
135343 ± 38% +61.1% 218075 ± 16% sched_debug.cfs_rq:/.spread0.max
0.01 ± 31% +78.3% 0.01 ± 22% perf-sched.sch_delay.avg.ms.do_nanosleep.hrtimer_nanosleep.__x64_sys_nanosleep.do_syscall_64
0.01 ± 7% +22.8% 0.02 ± 2% perf-sched.sch_delay.avg.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.do_syscall_64
0.02 ± 15% +27.1% 0.02 ± 11% perf-sched.sch_delay.avg.ms.do_wait.kernel_wait4.__do_sys_wait4.do_syscall_64
0.02 ± 44% +113.3% 0.04 ± 12% perf-sched.sch_delay.avg.ms.exit_to_user_mode_prepare.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.[unknown]
0.02 ± 10% +56.1% 0.03 ± 25% perf-sched.sch_delay.avg.ms.schedule_hrtimeout_range_clock.poll_schedule_timeout.constprop.0.do_select
0.02 ± 44% +113.3% 0.04 ± 12% perf-sched.sch_delay.max.ms.exit_to_user_mode_prepare.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.[unknown]
0.01 ± 11% +37.5% 0.01 ± 19% perf-sched.total_sch_delay.average.ms
2001 +120.7% 4416 ± 33% perf-sched.wait_and_delay.max.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.do_syscall_64
0.05 ± 54% +56.5% 0.08 ± 7% perf-sched.wait_time.avg.ms.schedule_timeout.khugepaged.kthread.ret_from_fork
2001 +120.7% 4416 ± 33% perf-sched.wait_time.max.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.do_syscall_64
0.05 ± 54% +56.5% 0.08 ± 7% perf-sched.wait_time.max.ms.schedule_timeout.khugepaged.kthread.ret_from_fork
718504 ± 3% +9.0% 783430 interrupts.CPU0.LOC:Local_timer_interrupts
718516 ± 3% +9.0% 783357 interrupts.CPU1.LOC:Local_timer_interrupts
334.50 ± 24% -45.4% 182.50 ± 34% interrupts.CPU1.RES:Rescheduling_interrupts
717807 ± 3% +9.2% 783709 interrupts.CPU10.LOC:Local_timer_interrupts
736.75 ±102% -73.5% 195.25 ± 17% interrupts.CPU10.RES:Rescheduling_interrupts
717666 ± 3% +9.2% 783362 interrupts.CPU11.LOC:Local_timer_interrupts
717664 ± 3% +9.2% 783781 interrupts.CPU12.LOC:Local_timer_interrupts
717135 ± 3% +9.2% 783332 interrupts.CPU13.LOC:Local_timer_interrupts
717271 ± 3% +9.2% 783544 interrupts.CPU14.LOC:Local_timer_interrupts
716867 ± 3% +9.3% 783686 interrupts.CPU15.LOC:Local_timer_interrupts
440.50 ± 41% -60.2% 175.50 ± 15% interrupts.CPU15.RES:Rescheduling_interrupts
716970 ± 3% +9.2% 783066 interrupts.CPU2.LOC:Local_timer_interrupts
717346 ± 3% +9.2% 783093 interrupts.CPU3.LOC:Local_timer_interrupts
682.25 ± 65% -68.3% 216.50 ± 20% interrupts.CPU3.RES:Rescheduling_interrupts
717415 ± 3% +9.2% 783331 interrupts.CPU4.LOC:Local_timer_interrupts
717222 ± 3% +9.1% 782450 interrupts.CPU5.LOC:Local_timer_interrupts
4460 ± 69% -83.6% 732.25 ± 97% interrupts.CPU5.NMI:Non-maskable_interrupts
4460 ± 69% -83.6% 732.25 ± 97% interrupts.CPU5.PMI:Performance_monitoring_interrupts
717168 ± 3% +9.3% 783638 interrupts.CPU6.LOC:Local_timer_interrupts
426.25 ± 67% +715.8% 3477 ± 71% interrupts.CPU6.NMI:Non-maskable_interrupts
426.25 ± 67% +715.8% 3477 ± 71% interrupts.CPU6.PMI:Performance_monitoring_interrupts
716671 ± 3% +9.3% 783574 interrupts.CPU7.LOC:Local_timer_interrupts
718995 ± 3% +9.0% 783595 interrupts.CPU8.LOC:Local_timer_interrupts
718744 ± 3% +9.0% 783527 interrupts.CPU9.LOC:Local_timer_interrupts
11481965 ± 3% +9.2% 12534482 interrupts.LOC:Local_timer_interrupts
36638 ± 6% +18.6% 43447 ± 10% interrupts.NMI:Non-maskable_interrupts
36638 ± 6% +18.6% 43447 ± 10% interrupts.PMI:Performance_monitoring_interrupts
7283 ± 52% -45.6% 3960 ± 23% interrupts.RES:Rescheduling_interrupts
6.085e+09 -6.6% 5.682e+09 perf-stat.i.branch-instructions
3869577 ± 4% +17.8% 4558585 ± 3% perf-stat.i.branch-misses
4.04 ± 5% -1.0 2.99 ± 3% perf-stat.i.cache-miss-rate%
21667091 ± 6% +39.2% 30171049 ± 3% perf-stat.i.cache-references
1.26 ± 2% -7.2% 1.17 perf-stat.i.cpi
1.424e+10 -4.4% 1.361e+10 perf-stat.i.cpu-cycles
7.776e+09 -6.3% 7.288e+09 perf-stat.i.dTLB-loads
0.03 ± 12% -0.0 0.02 ± 14% perf-stat.i.dTLB-store-miss-rate%
83017 ± 11% -36.6% 52610 ± 11% perf-stat.i.dTLB-store-misses
8.033e+09 -5.9% 7.558e+09 perf-stat.i.dTLB-stores
68.55 -6.8 61.76 perf-stat.i.iTLB-load-miss-rate%
306356 ± 4% -11.2% 272189 ± 3% perf-stat.i.iTLB-load-misses
151646 +10.6% 167664 perf-stat.i.iTLB-loads
3.019e+10 -6.3% 2.829e+10 perf-stat.i.instructions
91804 ± 4% +10.4% 101373 ± 2% perf-stat.i.instructions-per-iTLB-miss
1.83 -1.7% 1.80 perf-stat.i.ipc
0.89 -4.4% 0.85 perf-stat.i.metric.GHz
1369 -6.2% 1284 perf-stat.i.metric.M/sec
0.04 ± 86% -0.0 0.01 ± 29% perf-stat.i.node-load-miss-rate%
1.32 ± 61% -73.1% 0.36 ± 24% perf-stat.i.node-load-misses
1.22 ± 68% -65.9% 0.42 ± 24% perf-stat.i.node-store-misses
0.72 ± 7% +48.6% 1.07 ± 3% perf-stat.overall.MPKI
0.06 ± 4% +0.0 0.08 ± 3% perf-stat.overall.branch-miss-rate%
4.52 ± 5% -1.1 3.40 ± 2% perf-stat.overall.cache-miss-rate%
0.47 +2.0% 0.48 perf-stat.overall.cpi
0.00 ± 11% -0.0 0.00 ± 11% perf-stat.overall.dTLB-store-miss-rate%
66.86 -5.0 61.87 perf-stat.overall.iTLB-load-miss-rate%
2.12 -1.9% 2.08 perf-stat.overall.ipc
0.01 ± 66% -0.0 0.00 ± 25% perf-stat.overall.node-load-miss-rate%
0.00 ± 61% -0.0 0.00 ± 21% perf-stat.overall.node-store-miss-rate%
6.069e+09 -6.6% 5.667e+09 perf-stat.ps.branch-instructions
3872647 ± 4% +17.6% 4555828 ± 3% perf-stat.ps.branch-misses
21619892 ± 6% +39.2% 30101345 ± 3% perf-stat.ps.cache-references
1.421e+10 -4.4% 1.358e+10 perf-stat.ps.cpu-cycles
7.755e+09 -6.3% 7.268e+09 perf-stat.ps.dTLB-loads
82808 ± 11% -36.6% 52482 ± 11% perf-stat.ps.dTLB-store-misses
8.011e+09 -5.9% 7.537e+09 perf-stat.ps.dTLB-stores
305587 ± 4% -11.1% 271518 ± 3% perf-stat.ps.iTLB-load-misses
151265 +10.6% 167232 perf-stat.ps.iTLB-loads
3.011e+10 -6.3% 2.821e+10 perf-stat.ps.instructions
1.32 ± 61% -73.0% 0.36 ± 24% perf-stat.ps.node-load-misses
1.22 ± 68% -65.8% 0.42 ± 24% perf-stat.ps.node-store-misses
1.179e+13 -6.3% 1.105e+13 perf-stat.total.instructions
9.04 ± 11% -4.0 5.02 ± 48% perf-profile.calltrace.cycles-pp.main
6.39 ± 13% -2.9 3.44 ± 48% perf-profile.calltrace.cycles-pp.Proc_1
3.85 ± 21% -1.7 2.14 ± 50% perf-profile.calltrace.cycles-pp.Proc_8
1.67 ± 25% -1.2 0.47 ±100% perf-profile.calltrace.cycles-pp.Func_1
1.90 ± 22% -1.0 0.95 ± 81% perf-profile.calltrace.cycles-pp.Func_2
10.37 ± 8% -4.1 6.22 ± 47% perf-profile.children.cycles-pp.main
6.17 ± 10% -2.4 3.74 ± 48% perf-profile.children.cycles-pp.Proc_1
3.91 ± 12% -1.5 2.39 ± 50% perf-profile.children.cycles-pp.Proc_8
2.19 ± 10% -0.9 1.24 ± 49% perf-profile.children.cycles-pp.Func_2
0.59 ± 12% -0.3 0.33 ± 40% perf-profile.children.cycles-pp.strcmp@plt
0.08 ± 24% +0.1 0.13 ± 12% perf-profile.children.cycles-pp.enqueue_hrtimer
0.01 ±173% +0.1 0.07 ± 16% perf-profile.children.cycles-pp.rb_erase
0.01 ±173% +0.1 0.07 ± 21% perf-profile.children.cycles-pp.__hrtimer_get_next_event
0.04 ±101% +0.1 0.10 ± 8% perf-profile.children.cycles-pp.update_ts_time_stats
0.08 ± 26% +0.1 0.14 ± 15% perf-profile.children.cycles-pp.timerqueue_del
0.12 ± 22% +0.1 0.18 ± 14% perf-profile.children.cycles-pp.__remove_hrtimer
0.01 ±173% +0.1 0.08 ± 20% perf-profile.children.cycles-pp.perf_event_task_tick
0.10 ± 18% +0.1 0.17 ± 17% perf-profile.children.cycles-pp.__hrtimer_next_event_base
0.21 ± 8% +0.1 0.34 ± 13% perf-profile.children.cycles-pp.tick_irq_enter
0.22 ± 6% +0.1 0.35 ± 14% perf-profile.children.cycles-pp.irq_enter_rcu
0.07 ±173% +0.2 0.27 ± 21% perf-profile.children.cycles-pp.io_serial_in
0.07 ±173% +0.2 0.30 ± 21% perf-profile.children.cycles-pp.serial8250_console_putchar
0.07 ±173% +0.2 0.31 ± 20% perf-profile.children.cycles-pp.wait_for_xmitr
0.08 ±173% +0.2 0.32 ± 21% perf-profile.children.cycles-pp.uart_console_write
0.08 ±173% +0.2 0.33 ± 21% perf-profile.children.cycles-pp.serial8250_console_write
0.09 ±173% +0.2 0.33 ± 22% perf-profile.children.cycles-pp.asm_sysvec_irq_work
0.09 ±173% +0.2 0.33 ± 22% perf-profile.children.cycles-pp.sysvec_irq_work
0.09 ±173% +0.2 0.33 ± 22% perf-profile.children.cycles-pp.__sysvec_irq_work
0.09 ±173% +0.2 0.33 ± 22% perf-profile.children.cycles-pp.irq_work_run
0.09 ±173% +0.2 0.33 ± 22% perf-profile.children.cycles-pp.irq_work_single
0.09 ±173% +0.2 0.33 ± 22% perf-profile.children.cycles-pp.printk
0.09 ±173% +0.2 0.33 ± 22% perf-profile.children.cycles-pp.vprintk_emit
0.09 ±173% +0.2 0.33 ± 22% perf-profile.children.cycles-pp.console_unlock
0.09 ±173% +0.3 0.34 ± 24% perf-profile.children.cycles-pp.irq_work_run_list
8.83 ± 8% -3.6 5.24 ± 47% perf-profile.self.cycles-pp.main
5.21 ± 10% -2.1 3.09 ± 51% perf-profile.self.cycles-pp.Proc_1
3.35 ± 11% -1.3 2.06 ± 52% perf-profile.self.cycles-pp.Proc_8
1.67 ± 10% -0.8 0.91 ± 48% perf-profile.self.cycles-pp.Func_2
0.60 ± 22% -0.3 0.33 ± 34% perf-profile.self.cycles-pp.Proc_6
0.58 ± 12% -0.3 0.33 ± 40% perf-profile.self.cycles-pp.strcmp@plt
0.01 ±173% +0.1 0.07 ± 13% perf-profile.self.cycles-pp.rb_erase
0.08 ± 19% +0.1 0.15 ± 14% perf-profile.self.cycles-pp.__hrtimer_next_event_base
0.01 ±173% +0.1 0.08 ± 20% perf-profile.self.cycles-pp.perf_event_task_tick
0.37 ± 5% +0.1 0.52 ± 20% perf-profile.self.cycles-pp.cpuidle_enter_state
0.07 ±173% +0.2 0.27 ± 21% perf-profile.self.cycles-pp.io_serial_in
unixbench.score
19800 +-------------------------------------------------------------------+
| |
19600 |... ..+... ..+...+...+...+. +...+ ..+...+ |
19400 |-+ +. +. .. .. : ..+. |
| . : +. |
19200 |-+ + : : |
| : : |
19000 |-+ : : |
| O : : |
18800 |-+ : : |
18600 |-+ O :: |
| O O O + |
18400 |-+ O |
| O O O O O O O O O |
18200 +-------------------------------------------------------------------+
[*] 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-5.11.0-rc2-00181-ga91bd6223ecd" of type "text/plain" (172414 bytes)
View attachment "job-script" of type "text/plain" (7625 bytes)
View attachment "job.yaml" of type "text/plain" (5171 bytes)
View attachment "reproduce" of type "text/plain" (280 bytes)
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