[linus:master] [mm] 7625cb5673: stress-ng.mincore.ops_per_sec 28.1% improvement

[linus:master] [mm] 7625cb5673: stress-ng.mincore.ops_per_sec 28.1% improvement

[kernel test robot]

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