* [linus:master] [mm] 8d596d8b81: stress-ng.mlockmany.ops_per_sec 10.5% improvement
@ 2026-10-19 1:32 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-10-19 1:32 UTC (permalink / raw)
To: Barry Song
Cc: oe-lkp, lkp, linux-kernel, Andrew Morton, David Hildenbrand,
Kairui Song, Shakeel Butt, Baoquan He, Chris Li, Kemeng Shi,
Liam R. Howlett, Lorenzo Stoakes, Michal Hocko, Mike Rapoport,
Nhat Pham, Suren Baghdasaryan, Vlastimil Babka, Usama Arif,
linux-mm, yi1.lai
Hello,
kernel test robot noticed a 10.5% improvement of stress-ng.mlockmany.ops_per_sec on:
commit: 8d596d8b81ef56bf61538d6b4761a7b0d6138280 ("mm: avoid unnecessary lru drain for wp_can_reuse_anon_folio()") 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 4 sockets INTEL(R) XEON(R) PLATINUM 8592+ (Emerald Rapids) with 256G memory
parameters:
nr_threads: 100%
testtime: 60s
test: mlockmany
cpufreq_governor: performance
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20261019/202610190949.71c20bb5-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-emr-2sp1/mlockmany/stress-ng/60s
commit:
819bfbd47e ("mm/page_alloc: remove set_page_private() in prep_compound_tail()")
8d596d8b81 ("mm: avoid unnecessary lru drain for wp_can_reuse_anon_folio()")
819bfbd47e49df89 8d596d8b81ef56bf61538d6b476
---------------- ---------------------------
%stddev %change %stddev
\ | \
1050118 +10.6% 1161061 ± 2% stress-ng.mlockmany.ops
17541 +10.5% 19384 ± 2% stress-ng.mlockmany.ops_per_sec
2933233 -7.5% 2714192 stress-ng.time.involuntary_context_switches
76.26 +29.3% 98.61 ± 3% stress-ng.time.user_time
2425877 +9.4% 2654908 ± 2% 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
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