From: kernel test robot <yi1.lai@intel.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: oe-lkp@lists.linux.dev, lkp@intel.com,
linux-kernel@vger.kernel.org, yi1.lai@intel.com
Subject: [linus:master] [x86/signal] 9da9f342a8: stress-ng.timer.ops_per_sec 2.8% improvement
Date: Sun, 8 Nov 2026 16:47:22 +0800 [thread overview]
Message-ID: <202611080951.256d230a-lkp@intel.com> (raw)
Hello,
kernel test robot noticed a 2.8% improvement of stress-ng.timer.ops_per_sec on:
commit: 9da9f342a897a2d43ad947d4073b1912800ab436 ("x86/signal: Use scoped user access in the sigreturn system calls") 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: 192 threads 2 sockets Intel(R) Xeon(R) 6740E CPU @ 2.4GHz (Sierra Forest) with 256G memory
parameters:
nr_threads: 100%
testtime: 60s
test: timer
cpufreq_governor: performance
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20261108/202611080951.256d230a-lkp@intel.com
=========================================================================================
compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
gcc-14/performance/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-srf-2sp3/timer/stress-ng/60s
commit:
2806617c9c ("x86/entry: Use get_user() for the fast 32-bit syscall EBP fetch")
9da9f342a8 ("x86/signal: Use scoped user access in the sigreturn system calls")
2806617c9c02fe16 9da9f342a897a2d43ad947d4073
---------------- ---------------------------
%stddev %change %stddev
\ | \
9031 +1.9% 9207 stress-ng.time.system_time
1344 -11.8% 1184 ± 2% stress-ng.time.user_time
5.442e+09 +2.8% 5.593e+09 stress-ng.timer.ops
90751049 +2.8% 93261655 stress-ng.timer.ops_per_sec
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:[~2026-11-08 8:47 UTC|newest]
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