Hello,
kernel test robot noticed a 25.7% improvement of stress-ng.ramfs.ops_per_sec on:
commit: ec5ee5417b00278fa050b38d878b76f1365420fb ("rcu: Advance callbacks for
expedited GP completion in rcu_core()")
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: 256 threads 2 sockets Intel(R) Xeon(R) 6768P CPU @ 2.4GHz
(Granite Rapids) with 64G memory
parameters:
nr_threads: 100%
testtime: 60s
test: ramfs
cpufreq_governor: performance
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260924/[email protected]
=========================================================================================
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-gnr-2sp4/ramfs/stress-ng/60s
commit:
fde2b18817 ("rcu: Detect expedited grace period completion in rcu_pending()")
ec5ee5417b ("rcu: Advance callbacks for expedited GP completion in
rcu_core()")
fde2b18817e4f32b ec5ee5417b00278fa050b38d878
---------------- ---------------------------
%stddev %change %stddev
\ | \
427110 +25.7% 537009 stress-ng.ramfs.ops
7124 +25.7% 8957 stress-ng.ramfs.ops_per_sec
6004 ± 2% +561.7% 39731
stress-ng.time.involuntary_context_switches
685.50 -5.1% 650.33
stress-ng.time.percent_of_cpu_this_job_got
405.23 -5.4% 383.53 stress-ng.time.system_time
776758 +19.9% 931227
stress-ng.time.voluntary_context_switches
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
