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McKenney" , Vincent Guittot , Phil Auld , aubrey.li@linux.intel.com, yu.c.chen@intel.com, yi1.lai@intel.com Subject: [linus:master] [sched/core] 118a2cf4ce: stress-ng.schedpolicy.ops_per_sec 14.1% regression Message-ID: <202610231954.51716452-lkp@intel.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit Hello, kernel test robot noticed a 14.1% regression of stress-ng.schedpolicy.ops_per_sec on: commit: 118a2cf4ced60777a2408001e2b4838fed1cea55 ("sched/core: Call wakeup_preempt() for queued tasks during class change") 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: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory parameters: nr_threads: 100% testtime: 60s test: schedpolicy cpufreq_governor: performance If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202610231954.51716452-lkp@intel.com Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20261023/202610231954.51716452-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-spr-r02/schedpolicy/stress-ng/60s commit: v7.3-rc7 118a2cf4ce ("sched/core: Call wakeup_preempt() for queued tasks during class change") v7.3-rc7 118a2cf4ced60777a2408001e2b ---------------- --------------------------- %stddev %change %stddev \ | \ 246.24 -14.1% 211.56 stress-ng.schedpolicy.SCHED_BATCH_schedules_per_sec 246.24 -14.1% 211.56 stress-ng.schedpolicy.SCHED_DEADLINE_schedules_per_sec 246.24 -14.1% 211.55 stress-ng.schedpolicy.SCHED_FIFO_schedules_per_sec 246.23 -14.1% 211.55 stress-ng.schedpolicy.SCHED_OTHER_schedules_per_sec 246.24 -14.1% 211.56 stress-ng.schedpolicy.SCHED_RR_schedules_per_sec 16540375 -14.1% 14210394 stress-ng.schedpolicy.ops 275785 -14.1% 236940 stress-ng.schedpolicy.ops_per_sec 85768 ± 3% +734.4% 715671 ± 2% stress-ng.time.involuntary_context_switches 32443 ± 2% +13.9% 36955 ± 2% stress-ng.time.minor_page_faults 21807 -10.3% 19559 stress-ng.time.percent_of_cpu_this_job_got 13087 -10.3% 11737 stress-ng.time.system_time 78783 ± 2% +634.5% 578684 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