* [linus:master] [mm] 7625cb5673: stress-ng.mincore.ops_per_sec 28.1% improvement
@ 2026-10-19 1:59 kernel test robot
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From: kernel test robot @ 2026-10-19 1:59 UTC (permalink / raw)
To: Kefeng Wang
Cc: oe-lkp, lkp, linux-kernel, Andrew Morton, Pedro Falcato,
David Hildenbrand, Jann Horn, Liam R. Howlett, Lorenzo Stoakes,
Vlastimil Babka, Zi Yan, linux-mm, yi1.lai
Hello,
kernel test robot noticed a 28.1% improvement of stress-ng.mincore.ops_per_sec on:
commit: 7625cb56733bfd470e9fae69a1b8b78aa8b1d3eb ("mm: mincore: replace __get_free_page() with kmalloc()") 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: mincore
cpufreq_governor: performance
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20261019/202610190930.7aeab52b-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/mincore/stress-ng/60s
commit:
006943a9b4 ("mm: mincore: remove special handling for VM_PFNMAP")
7625cb5673 ("mm: mincore: replace __get_free_page() with kmalloc()")
006943a9b437b2d4 7625cb56733bfd470e9fae69a1b
---------------- ---------------------------
%stddev %change %stddev
\ | \
547.22 -25.4% 408.24 stress-ng.mincore.nanosecs_per_mincore_call
27632999 +28.1% 35386493 stress-ng.mincore.ops
460725 +28.1% 590032 stress-ng.mincore.ops_per_sec
1729 +7.1% 1852 stress-ng.time.user_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
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2026-10-19 1:59 [linus:master] [mm] 7625cb5673: stress-ng.mincore.ops_per_sec 28.1% improvement kernel test robot
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