[ardb:efi-arm-memmap-dtprop] [efivarfs] eaa4abe54e: stress-ng.get.ops_per_sec 2915.8% improvement

[ardb:efi-arm-memmap-dtprop] [efivarfs] eaa4abe54e: stress-ng.get.ops_per_sec 2915.8% improvement

[kernel test rebot]

Hello,

kernel test robot noticed a 2915.8% improvement of stress-ng.get.ops_per_sec on:


commit: eaa4abe54eb5de1ee002aa2e4f88fc49156f2fdb ("efivarfs: Cache occupied and available space") https://git.kernel.org/cgit/linux/kernel/git/ardb/linux.git efi-arm-memmap-dtprop

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: get
	cpufreq_governor: performance


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


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260827/202608270836.4a9957c0-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-gnr-2sp4/get/stress-ng/60s

commit: 
  44e4ec1a80 ("efi: apple-properties: validate setup data header length")
  eaa4abe54e ("efivarfs: Cache occupied and available space")

44e4ec1a802d2078 eaa4abe54eb5de1ee002aa2e4f8
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
  15418287         +2912.1%  4.644e+08        stress-ng.get.ops
    256967         +2915.8%    7749645        stress-ng.get.ops_per_sec
    554.00 ±  4%  +11739.5%      65591        stress-ng.time.involuntary_context_switches
     69114 ± 17%     -52.8%      32593 ±  2%  stress-ng.time.minor_page_faults
    209.30        +12040.1%      25409        stress-ng.time.percent_of_cpu_this_job_got
    120.05        +12557.5%      15195        stress-ng.time.system_time
      6.51         +1095.1%      77.76        stress-ng.time.user_time
     97296           -41.8%      56610 ± 14%  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