Greeting,

FYI, we noticed a -12.7% regression of phoronix-test-suite.supertuxkart.1280x1024.Fullscreen.Basic.1.GranParadisoIsland.frames_per_second due to commit:

commit: 55ea1cb178ef85677b35126685fbf5d8d649b62e ("drm/i915: Enable async flips in i915") git://anongit.freedesktop.org/drm-intel drm-intel-next-queued

in testcase: phoronix-test-suite on test machine: 12 threads Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz with 8G memory with following parameters:

need_x: true test: supertuxkart-1.5.2 option_a: Fullscreen option_b: Basic option_c: 1 option_d: Gran Paradiso Island [Approximately 275k triangles; advanced graphics] cpufreq_governor: performance ucode: 0xd6

test-description: The Phoronix Test Suite is the most comprehensive testing and benchmarking platform available that provides an extensible framework for which new tests can be easily added. test-url: http://www.phoronix-test-suite.com/

In addition to that, the commit also has significant impact on the following tests:

+------------------+--------------------------------------------------------------------------------------------------------------------------------------+ | testcase: change | phoronix-test-suite: phoronix-test-suite.gputest.Plot3D.1280x1024.Windowed.points 5.9% regression | | test machine | 12 threads Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz with 8G memory | | test parameters | cpufreq_governor=performance | | | need_x=true | | | option_a=Plot3D | | | option_b=Windowed | | | test=gputest-1.3.2 | | | ucode=0xd6 | +------------------+--------------------------------------------------------------------------------------------------------------------------------------+ | testcase: change | phoronix-test-suite: phoronix-test-suite.supertuxkart.1280x1024.Fullscreen.Ultimate.1.CandelaCity.frames_per_second 2.4% improvement | | test machine | 12 threads Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz with 8G memory | | test parameters | cpufreq_governor=performance | | | need_x=true | | | option_a=Fullscreen | | | option_b=Ultimate | | | option_c=1 | | | option_d=Candela City [Approximately 400k triangles; advanced graphics] | | | test=supertuxkart-1.5.2 | | | ucode=0xd6 | +------------------+--------------------------------------------------------------------------------------------------------------------------------------+

If you fix the issue, kindly add following tag Reported-by: kernel test robot rong.a.chen@intel.com

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

To reproduce:

git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml

========================================================================================= compiler/cpufreq_governor/kconfig/need_x/option_a/option_b/option_c/option_d/rootfs/tbox_group/test/testcase/ucode: gcc-9/performance/x86_64-rhel-8.3/true/Fullscreen/Basic/1/Gran Paradiso Island [Approximately 275k triangles; advanced graphics]/debian-x86_64-phoronix/lkp-cfl-d1/supertuxkart-1.5.2/phoronix-test-suite/0xd6

commit: 6914c9685e ("Documentation/gpu: Add asynchronous flip documentation for i915") 55ea1cb178 ("drm/i915: Enable async flips in i915")

6914c9685e0a2376 55ea1cb178ef85677b35126685f ---------------- --------------------------- %stddev %change %stddev \ | \ 252.40 -12.7% 220.41 phoronix-test-suite.supertuxkart.1280x1024.Fullscreen.Basic.1.GranParadisoIsland.frames_per_second 25367 ± 68% +183.7% 71956 ± 28% phoronix-test-suite.time.involuntary_context_switches 92.25 +2.2% 94.25 phoronix-test-suite.time.percent_of_cpu_this_job_got

260 +---------------------------------------------------------------------+ | | 255 |.+.+. +.+. .++. .+.+. .++.+.+.+.+. .+ .+. .+.+.+ .+.++. .+.| 250 |-+ + +.+.+ + + + + + +.+. .+ + | | + | 245 |-+ | 240 |-+ | | | 235 |-+ | 230 |-+ | | | 225 |-+ O O O | 220 |-O O O O O O O O O O O O O OO O O O OO | | O O O O O O O | 215 +---------------------------------------------------------------------+

[*] bisect-good sample [O] bisect-bad sample

*************************************************************************************************** lkp-cfl-d1: 12 threads Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz with 8G memory ========================================================================================= compiler/cpufreq_governor/kconfig/need_x/option_a/option_b/rootfs/tbox_group/test/testcase/ucode: gcc-9/performance/x86_64-rhel-8.3/true/Plot3D/Windowed/debian-x86_64-phoronix/lkp-cfl-d1/gputest-1.3.2/phoronix-test-suite/0xd6

commit: 6914c9685e ("Documentation/gpu: Add asynchronous flip documentation for i915") 55ea1cb178 ("drm/i915: Enable async flips in i915")

6914c9685e0a2376 55ea1cb178ef85677b35126685f ---------------- --------------------------- %stddev %change %stddev \ | \ 8937 +5.9% 9466 phoronix-test-suite.gputest.Plot3D.1280x1024.Windowed.points 750.25 ± 14% +25.7% 943.00 ± 5% phoronix-test-suite.time.involuntary_context_switches 17310 -3.6% 16684 phoronix-test-suite.time.major_page_faults 10.00 +20.0% 12.00 ± 5% phoronix-test-suite.time.percent_of_cpu_this_job_got 13.36 +24.2% 16.59 ± 5% phoronix-test-suite.time.user_time 62842 +89.3% 118984 phoronix-test-suite.time.voluntary_context_switches

*************************************************************************************************** lkp-cfl-d1: 12 threads Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz with 8G memory ========================================================================================= compiler/cpufreq_governor/kconfig/need_x/option_a/option_b/option_c/option_d/rootfs/tbox_group/test/testcase/ucode: gcc-9/performance/x86_64-rhel-8.3/true/Fullscreen/Ultimate/1/Candela City [Approximately 400k triangles; advanced graphics]/debian-x86_64-phoronix/lkp-cfl-d1/supertuxkart-1.5.2/phoronix-test-suite/0xd6

commit: 6914c9685e ("Documentation/gpu: Add asynchronous flip documentation for i915") 55ea1cb178 ("drm/i915: Enable async flips in i915")

6914c9685e0a2376 55ea1cb178ef85677b35126685f ---------------- --------------------------- %stddev %change %stddev \ | \ 16.54 +2.4% 16.93 phoronix-test-suite.supertuxkart.1280x1024.Fullscreen.Ultimate.1.CandelaCity.frames_per_second 2734 ± 3% -6.0% 2569 phoronix-test-suite.time.involuntary_context_switches 43.97 -4.2% 42.13 phoronix-test-suite.time.user_time 296118 -1.1% 292950 phoronix-test-suite.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.

Thanks, Rong Chen