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Message-ID: <202309041403.9a7531ba-oliver.sang@intel.com>
Date: Mon, 4 Sep 2023 14:29:20 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Peter Zijlstra <peterz@...radead.org>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
<linux-kernel@...r.kernel.org>,
Mike Galbraith <umgwanakikbuti@...il.com>,
<ying.huang@...el.com>, <feng.tang@...el.com>,
<fengwei.yin@...el.com>, <aubrey.li@...ux.intel.com>,
<yu.c.chen@...el.com>, <oliver.sang@...el.com>
Subject: [linus:master] [sched/eevdf] 63304558ba:
stress-ng.dirdeep.ops_per_sec -3.1% regression
hi, Peter Zijlstra,
we know from Yu Chen that this commit could benefit other workloads like
blogbench/hackbench. since by more runs of this stress-ng test, we still
observed stable small regression. we just report this result FYI.
Hello,
kernel test robot noticed a -3.1% regression of stress-ng.dirdeep.ops_per_sec on:
commit: 63304558ba5dcaaff9e052ee43cfdcc7f9c29e85 ("sched/eevdf: Curb wakeup-preemption")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
testcase: stress-ng
test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-9980XE CPU @ 3.00GHz (Skylake) with 32G memory
parameters:
nr_threads: 10%
disk: 1SSD
testtime: 60s
fs: xfs
class: filesystem
test: dirdeep
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/202309041403.9a7531ba-oliver.sang@intel.com
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20230904/202309041403.9a7531ba-oliver.sang@intel.com
=========================================================================================
class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
filesystem/gcc-12/performance/1SSD/xfs/x86_64-rhel-8.3/10%/debian-11.1-x86_64-20220510.cgz/lkp-skl-d08/dirdeep/stress-ng/60s
commit:
7170509cad ("sched: Simplify sched_core_cpu_{starting,deactivate}()")
63304558ba ("sched/eevdf: Curb wakeup-preemption")
7170509cadbb76e5 63304558ba5dcaaff9e052ee43c
---------------- ---------------------------
%stddev %change %stddev
\ | \
7.85 -2.9% 7.62 iostat.cpu.system
0.14 ± 20% +0.1 0.22 ± 21% perf-profile.children.cycles-pp.pick_next_task_fair
12528411 +100.0% 25056823 sched_debug.sysctl_sched.sysctl_sched_features
2874027 -3.1% 2785140 stress-ng.dirdeep.ops
47338 -3.1% 45876 stress-ng.dirdeep.ops_per_sec
16652 ± 3% -10.6% 14890 ± 4% stress-ng.time.involuntary_context_switches
269.05 -3.0% 260.90 stress-ng.time.percent_of_cpu_this_job_got
164.73 -3.0% 159.74 stress-ng.time.system_time
0.01 ± 19% +1659.6% 0.20 ± 6% perf-sched.sch_delay.avg.ms.worker_thread.kthread.ret_from_fork.ret_from_fork_asm
0.00 ± 20% -42.0% 0.00 ± 34% perf-sched.sch_delay.avg.ms.xlog_force_lsn.xfs_log_force_seq.xfs_file_fsync.__x64_sys_fsync
0.19 ± 4% +187.6% 0.55 ± 6% perf-sched.wait_and_delay.avg.ms.__cond_resched.dput.terminate_walk.path_openat.do_filp_open
0.21 ± 7% +129.8% 0.49 ± 7% perf-sched.wait_and_delay.avg.ms.schedule_timeout.__wait_for_common.__flush_workqueue.xlog_cil_push_now.isra
0.19 ± 10% +204.1% 0.59 ± 11% perf-sched.wait_time.avg.ms.__cond_resched.__kmem_cache_alloc_node.kmalloc_trace.xfs_vn_get_link.pick_link
0.19 ± 4% +189.1% 0.55 ± 6% perf-sched.wait_time.avg.ms.__cond_resched.dput.terminate_walk.path_openat.do_filp_open
0.21 ± 7% +131.1% 0.49 ± 7% perf-sched.wait_time.avg.ms.schedule_timeout.__wait_for_common.__flush_workqueue.xlog_cil_push_now.isra
0.28 ± 28% +235.2% 0.94 ± 20% perf-sched.wait_time.avg.ms.xlog_wait_on_iclog.xfs_file_fsync.__x64_sys_fsync.do_syscall_64
3.693e+09 -2.7% 3.593e+09 perf-stat.i.branch-instructions
1.174e+10 -2.4% 1.146e+10 perf-stat.i.cpu-cycles
5.923e+09 -2.8% 5.756e+09 perf-stat.i.dTLB-loads
3.172e+09 -2.9% 3.081e+09 perf-stat.i.dTLB-stores
2.104e+10 -2.8% 2.046e+10 perf-stat.i.instructions
0.33 -2.4% 0.32 perf-stat.i.metric.GHz
358.39 -2.8% 348.30 perf-stat.i.metric.M/sec
3.635e+09 -2.7% 3.536e+09 perf-stat.ps.branch-instructions
1.156e+10 -2.4% 1.128e+10 perf-stat.ps.cpu-cycles
5.831e+09 -2.8% 5.666e+09 perf-stat.ps.dTLB-loads
3.123e+09 -2.9% 3.033e+09 perf-stat.ps.dTLB-stores
2.071e+10 -2.8% 2.014e+10 perf-stat.ps.instructions
1.319e+12 -3.1% 1.279e+12 perf-stat.total.instructions
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
View attachment "config-6.5.0-rc2-00044-g63304558ba5d" of type "text/plain" (158330 bytes)
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View attachment "job.yaml" of type "text/plain" (6446 bytes)
View attachment "repro-script" of type "text/plain" (596 bytes)
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