[linus:master] [nsfs] 82e9343260: stress-ng.usersyscall.ops_per_sec 12.4% improvement
From: kernel test robot
Date: Wed Oct 14 2026 - 03:03:19 EST
Hello,
kernel test robot noticed a 12.4% improvement of stress-ng.usersyscall.ops_per_sec on:
commit: 82e9343260dfc6dda6349f285d9a5eac3e0738d7 ("nsfs: keep namespace tree fields stable until after RCU grace period") 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%
testtime: 60s
test: usersyscall
cpufreq_governor: performance
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20261014/202610140836.4d5baee2-lkp@xxxxxxxxx
=========================================================================================
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-spr-2sp2/usersyscall/stress-ng/60s
commit:
0ecd56573c ("ext4: Avoid entering writeback paths during fastcommit replay")
82e9343260 ("nsfs: keep namespace tree fields stable until after RCU grace period")
0ecd56573c1f272c 82e9343260dfc6dda6349f285d9
---------------- ---------------------------
%stddev %change %stddev
\ | \
33817 -10.8% 30152 stress-ng.usersyscall.nanosecs_per_syscall
1.908e+08 +12.4% 2.144e+08 stress-ng.usersyscall.ops
3187687 +12.4% 3582876 stress-ng.usersyscall.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