[drm-misc:for-linux-next] [drm/ast] 7b8a74bc42: unixbench.throughput 4.0% improvement

[kernel test robot]

Hello,

kernel test robot noticed a 4.0% improvement of unixbench.throughput on:


commit: 7b8a74bc42016173ddb4872d113f132c8ca59fc1 ("drm/ast: Program mode for AST DP in atomic_mode_set")
git://anongit.freedesktop.org/drm/drm-misc for-linux-next

testcase: unixbench
test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory
parameters:

	runtime: 300s
	nr_task: 1
	test: 2d-window
	cpufreq_governor: performance



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


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240708/202407081414.8fc2a8f-oliver.sang@intel.com

=========================================================================================
compiler/cpufreq_governor/kconfig/nr_task/rootfs/runtime/tbox_group/test/testcase:
  gcc-13/performance/x86_64-rhel-8.3/1/debian-12-x86_64-20240206.cgz/300s/lkp-spr-r02/2d-window/unixbench

commit: 
  2a7e5f4531 ("drm/ast: Implement atomic enable/disable for encoders")
  7b8a74bc42 ("drm/ast: Program mode for AST DP in atomic_mode_set")

2a7e5f45314cfd99 7b8a74bc42016173ddb4872d113 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
      0.18            -0.0        0.16        mpstat.cpu.all.sys%
      2094            +4.0%       2177        unixbench.score
      3141            +4.0%       3266        unixbench.throughput
    215.57 ±  2%     -14.9%     183.46 ±  2%  unixbench.time.system_time
    318.37           +10.8%     352.81        unixbench.time.user_time
   1753586            +4.3%    1829782        unixbench.workload
 2.037e+09           +12.4%  2.289e+09        perf-stat.i.branch-instructions
      0.56 ±  2%      -0.0        0.54        perf-stat.i.branch-miss-rate%
  11300458            +2.9%   11628854        perf-stat.i.branch-misses
      0.65            -7.8%       0.60        perf-stat.i.cpi
 9.653e+09           +12.0%  1.081e+10        perf-stat.i.instructions
      2.19           +12.3%       2.46        perf-stat.i.ipc
      0.03 ±  4%     -11.6%       0.03 ±  5%  perf-stat.overall.MPKI
      0.56 ±  2%      -0.0        0.51        perf-stat.overall.branch-miss-rate%
      0.47           -10.5%       0.42        perf-stat.overall.cpi
      2.12           +11.7%       2.37        perf-stat.overall.ipc
   3086774            +7.8%    3326418        perf-stat.overall.path-length
 2.031e+09           +12.4%  2.283e+09        perf-stat.ps.branch-instructions
  11277892            +2.9%   11606260        perf-stat.ps.branch-misses
 9.625e+09           +12.0%  1.078e+10        perf-stat.ps.instructions
 5.413e+12 ±  2%     +12.4%  6.086e+12        perf-stat.total.instructions
      0.24 ± 43%      -0.2        0.00        perf-profile.children.cycles-pp.ast_dp_set_mode




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