From: kernel test robot <yi1.lai@intel.com>
To: Tejun Heo <tj@kernel.org>
Cc: oe-lkp@lists.linux.dev, lkp@intel.com,
linux-kernel@vger.kernel.org, Yao Kai <yaokai34@huawei.com>,
yi1.lai@intel.com
Subject: [linus:master] [workqueue] f1639cde5f: stress-ng.io.ops_per_sec 9.9% improvement
Date: Tue, 10 Nov 2026 13:55:27 +0800 [thread overview]
Message-ID: <202611100656.fcd6dc19-lkp@intel.com> (raw)
Hello,
kernel test robot noticed a 9.9% improvement of stress-ng.io.ops_per_sec on:
commit: f1639cde5f5c1bee25498ef988227ee8cf5ddb04 ("workqueue: Make flush_workqueue() visit only pwqs active since the last flush") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
testcase: stress-ng
config: x86_64-rhel-9.4
compiler: gcc-14
test machine: 224 threads 2 sockets Intel(R) Xeon(R) (Sapphire Rapids) with 128G memory
parameters:
nr_threads: 100%
disk: 1SSD
testtime: 60s
fs: xfs
test: io
cpufreq_governor: performance
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20261110/202611100656.fcd6dc19-lkp@intel.com
=========================================================================================
compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
gcc-14/performance/1SSD/xfs/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-spr-2sp3/io/stress-ng/60s
commit:
31e33de1f4 ("workqueue: Maintain pwq->total_in_flight")
f1639cde5f ("workqueue: Make flush_workqueue() visit only pwqs active since the last flush")
31e33de1f4e159c7 f1639cde5f5c1bee25498ef9882
---------------- ---------------------------
%stddev %change %stddev
\ | \
260170 ± 3% +9.9% 285895 ± 4% stress-ng.io.ops
4337 ± 3% +9.9% 4766 ± 4% stress-ng.io.ops_per_sec
6244092 ± 3% +9.9% 6861492 ± 4% stress-ng.time.file_system_outputs
4547 ± 7% -15.8% 3826 ± 4% stress-ng.time.involuntary_context_switches
3320 ± 3% -17.5% 2739 ± 5% stress-ng.time.percent_of_cpu_this_job_got
1995 ± 3% -17.5% 1645 ± 5% stress-ng.time.system_time
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
reply other threads:[~2026-11-10 5:55 UTC|newest]
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