[harry:b4/sheaf-size-round-up] [mm/slab] ddf56dfc79: will-it-scale.per_process_ops 54.5% improvement

[kernel test robot <yi1.lai@intel.com>]

Hello,

kernel test robot noticed a 54.5% improvement of will-it-scale.per_process_ops on:


commit: ddf56dfc79f5734d7b3aa8ba81f195d52b3e5823 ("mm/slab: round up sheaf size to kmalloc size for explicit sheaf_capacity")
https://git.kernel.org/cgit/linux/kernel/git/harry/linux.git b4/sheaf-size-round-up

testcase: will-it-scale
config: x86_64-rhel-9.4
compiler: gcc-14
test machine: 256 threads 2 sockets GENUINE INTEL(R) XEON(R) (Sierra Forest) with 128G memory
parameters:

	nr_task: 100%
	mode: process
	test: brk2
	cpufreq_governor: performance


Details are as below:
-------------------------------------------------------------------------------------------------->


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20261009/202610091451.beda4ec3-lkp@intel.com

=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
  gcc-14/performance/x86_64-rhel-9.4/process/100%/debian-13-x86_64-20250902.cgz/lkp-srf-2sp1/brk2/will-it-scale

commit: 
  675a745c61 ("EDITME: cover title for sheaf-size-round-up")
  ddf56dfc79 ("mm/slab: round up sheaf size to kmalloc size for explicit sheaf_capacity")

675a745c6113e420 ddf56dfc79f5734d7b3aa8ba81f 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
  70440501           +54.5%  1.089e+08        will-it-scale.256.processes
      0.30 ±  3%     +35.9%       0.41 ±  8%  will-it-scale.256.processes_idle
    275157           +54.5%     425248        will-it-scale.per_process_ops
  70440501           +54.5%  1.089e+08        will-it-scale.workload


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