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Message-ID: <202504211320.5025beac-lkp@intel.com>
Date: Mon, 21 Apr 2025 13:56:07 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Ojaswin Mujoo <ojaswin@...ux.ibm.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
Theodore Ts'o <tytso@....edu>, Jan Kara <jack@...e.cz>, Ritesh Harjani
<ritesh.list@...il.com>, Baokun Li <libaokun1@...wei.com>,
<linux-ext4@...r.kernel.org>, <oliver.sang@...el.com>
Subject: [linus:master] [ext4] 896b02d0b9: stress-ng.fiemap.ops_per_sec
15.8% regression
Hello,
kernel test robot noticed a 15.8% regression of stress-ng.fiemap.ops_per_sec on:
commit: 896b02d0b9e7deb4a4eb365e13dd912b49916519 ("ext4: Make sb update interval tunable")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
[test failed on linus/master 1a1d569a75f3ab2923cb62daf356d102e4df2b86]
[test failed on linux-next/master f660850bc246fef15ba78c81f686860324396628]
testcase: stress-ng
config: x86_64-rhel-9.4
compiler: gcc-12
test machine: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
parameters:
nr_threads: 100%
disk: 1HDD
testtime: 60s
fs: ext4
test: fiemap
cpufreq_governor: performance
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202504211320.5025beac-lkp@intel.com
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250421/202504211320.5025beac-lkp@intel.com
=========================================================================================
compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
gcc-12/performance/1HDD/ext4/x86_64-rhel-9.4/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp8/fiemap/stress-ng/60s
commit:
ce2f26e737 ("ext4: avoid journaling sb update on error if journal is destroying")
896b02d0b9 ("ext4: Make sb update interval tunable")
ce2f26e73783b4a7 896b02d0b9e7deb4a4eb365e13d
---------------- ---------------------------
%stddev %change %stddev
\ | \
2.29 ± 6% -13.2% 1.99 ± 7% iostat.cpu.user
1688381 ± 2% -16.4% 1411358 ± 4% vmstat.system.cs
0.01 ± 12% -0.0 0.01 ± 10% mpstat.cpu.all.soft%
2.33 ± 6% -0.3 2.01 ± 7% mpstat.cpu.all.usr%
28467 ± 22% +39.4% 39676 ± 13% numa-meminfo.node0.Inactive
28467 ± 22% +39.4% 39676 ± 13% numa-meminfo.node0.Inactive(file)
7099 ± 22% +40.0% 9937 ± 13% numa-vmstat.node0.nr_inactive_file
7099 ± 22% +40.0% 9937 ± 13% numa-vmstat.node0.nr_zone_inactive_file
3186734 ± 2% -13.0% 2770907 meminfo.Active
3186734 ± 2% -13.0% 2770907 meminfo.Active(anon)
2332511 ± 4% -17.1% 1933636 ± 2% meminfo.Shmem
829642 ± 3% -16.0% 696952 ± 4% sched_debug.cpu.nr_switches.avg
992823 ± 4% -14.5% 849332 ± 6% sched_debug.cpu.nr_switches.max
153915 ± 5% -15.2% 130547 ± 11% sched_debug.cpu.nr_switches.stddev
64971130 ± 3% -15.8% 54708915 ± 4% stress-ng.fiemap.ops
1067456 ± 3% -15.8% 898490 ± 4% stress-ng.fiemap.ops_per_sec
1.079e+08 ± 2% -16.0% 90643140 ± 4% stress-ng.time.involuntary_context_switches
67.64 ± 9% -16.5% 56.46 ± 9% stress-ng.time.user_time
797292 ± 2% -13.2% 692413 proc-vmstat.nr_active_anon
1499550 -6.7% 1398519 proc-vmstat.nr_file_pages
583908 ± 4% -17.3% 483006 ± 2% proc-vmstat.nr_shmem
797292 ± 2% -13.2% 692413 proc-vmstat.nr_zone_active_anon
1256873 ± 2% -12.3% 1102563 proc-vmstat.numa_hit
1190636 ± 2% -13.0% 1036297 proc-vmstat.numa_local
1367314 ± 2% -11.3% 1212232 ± 2% proc-vmstat.pgalloc_normal
369155 ± 5% -6.9% 343753 ± 2% proc-vmstat.pgfault
2.492e+10 ± 2% -18.5% 2.031e+10 perf-stat.i.branch-instructions
1.232e+08 ± 7% -15.2% 1.045e+08 ± 6% perf-stat.i.branch-misses
3.895e+08 ± 2% -8.8% 3.553e+08 perf-stat.i.cache-references
1759358 ± 2% -16.0% 1478535 ± 3% perf-stat.i.context-switches
1.80 ± 2% +22.5% 2.20 perf-stat.i.cpi
1.262e+11 ± 2% -18.5% 1.028e+11 perf-stat.i.instructions
0.56 ± 2% -18.5% 0.46 perf-stat.i.ipc
27.44 ± 2% -15.8% 23.10 ± 3% perf-stat.i.metric.K/sec
4132 ± 5% -8.9% 3766 ± 2% perf-stat.i.minor-faults
4132 ± 5% -8.9% 3766 ± 2% perf-stat.i.page-faults
1.79 ± 2% +22.8% 2.20 perf-stat.overall.cpi
0.56 ± 2% -18.6% 0.45 perf-stat.overall.ipc
2.45e+10 ± 2% -18.5% 1.998e+10 perf-stat.ps.branch-instructions
1.21e+08 ± 7% -15.0% 1.028e+08 ± 6% perf-stat.ps.branch-misses
3.828e+08 ± 2% -8.7% 3.496e+08 perf-stat.ps.cache-references
1729946 ± 2% -15.9% 1454325 ± 3% perf-stat.ps.context-switches
1.241e+11 ± 2% -18.5% 1.011e+11 perf-stat.ps.instructions
4060 ± 5% -8.8% 3703 ± 2% perf-stat.ps.minor-faults
4060 ± 5% -8.8% 3703 ± 2% perf-stat.ps.page-faults
7.699e+12 ± 2% -18.7% 6.262e+12 ± 2% perf-stat.total.instructions
0.02 ±194% +3583.1% 0.80 ±127% perf-sched.sch_delay.avg.ms.__cond_resched.zap_pte_range.zap_pmd_range.isra.0
0.14 ± 5% +21.4% 0.17 ± 2% perf-sched.sch_delay.avg.ms.__x64_sys_sched_yield.do_syscall_64.entry_SYSCALL_64_after_hwframe.[unknown]
0.02 ± 12% +35.4% 0.03 ± 11% perf-sched.sch_delay.avg.ms.schedule_timeout.kcompactd.kthread.ret_from_fork
0.01 ± 3% +14.8% 0.01 ± 6% perf-sched.sch_delay.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
2.90 ±107% +259.8% 10.43 ± 35% perf-sched.sch_delay.max.ms.__cond_resched.down_write.shmem_file_write_iter.vfs_write.ksys_write
8.62 ± 28% +69.3% 14.58 ± 8% perf-sched.sch_delay.max.ms.__cond_resched.shmem_get_folio_gfp.shmem_write_begin.generic_perform_write.shmem_file_write_iter
0.02 ±194% +5175.4% 1.14 ± 88% perf-sched.sch_delay.max.ms.__cond_resched.zap_pte_range.zap_pmd_range.isra.0
395.95 ±185% -99.6% 1.67 ± 45% perf-sched.sch_delay.max.ms.do_nanosleep.hrtimer_nanosleep.common_nsleep.__x64_sys_clock_nanosleep
10.22 ± 15% +49.3% 15.26 ± 4% perf-sched.sch_delay.max.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown]
0.05 ± 10% +29.0% 0.06 ± 13% perf-sched.sch_delay.max.ms.schedule_timeout.kcompactd.kthread.ret_from_fork
0.14 ± 5% +20.6% 0.17 ± 2% perf-sched.total_sch_delay.average.ms
0.44 ± 3% +19.7% 0.52 ± 3% perf-sched.total_wait_and_delay.average.ms
6639596 ± 3% -17.7% 5461347 ± 3% perf-sched.total_wait_and_delay.count.ms
0.30 ± 2% +19.3% 0.36 ± 3% perf-sched.total_wait_time.average.ms
0.28 ± 3% +20.8% 0.34 ± 2% perf-sched.wait_and_delay.avg.ms.__x64_sys_sched_yield.do_syscall_64.entry_SYSCALL_64_after_hwframe.[unknown]
6614032 ± 3% -17.8% 5436664 ± 3% perf-sched.wait_and_delay.count.__x64_sys_sched_yield.do_syscall_64.entry_SYSCALL_64_after_hwframe.[unknown]
5.80 ±107% +259.8% 20.86 ± 35% perf-sched.wait_and_delay.max.ms.__cond_resched.down_write.shmem_file_write_iter.vfs_write.ksys_write
17.23 ± 28% +69.3% 29.17 ± 8% perf-sched.wait_and_delay.max.ms.__cond_resched.shmem_get_folio_gfp.shmem_write_begin.generic_perform_write.shmem_file_write_iter
20.45 ± 15% +63.4% 33.41 ± 21% perf-sched.wait_and_delay.max.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown]
0.02 ±223% +4040.9% 0.79 ±127% perf-sched.wait_time.avg.ms.__cond_resched.zap_pte_range.zap_pmd_range.isra.0
0.15 ± 2% +20.6% 0.18 ± 2% perf-sched.wait_time.avg.ms.__x64_sys_sched_yield.do_syscall_64.entry_SYSCALL_64_after_hwframe.[unknown]
2.90 ±107% +259.8% 10.43 ± 35% perf-sched.wait_time.max.ms.__cond_resched.down_write.shmem_file_write_iter.vfs_write.ksys_write
8.62 ± 28% +69.3% 14.58 ± 8% perf-sched.wait_time.max.ms.__cond_resched.shmem_get_folio_gfp.shmem_write_begin.generic_perform_write.shmem_file_write_iter
0.02 ±223% +5863.5% 1.14 ± 88% perf-sched.wait_time.max.ms.__cond_resched.zap_pte_range.zap_pmd_range.isra.0
10.22 ± 15% +103.2% 20.77 ± 61% perf-sched.wait_time.max.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown]
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.
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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