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McKenney" , rcu@vger.kernel.org, yi1.lai@intel.com Subject: [linus:master] [rcu] ec5ee5417b: stress-ng.ramfs.ops_per_sec 25.7% improvement Message-ID: <202609241934.228b4a14-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 25.7% improvement of stress-ng.ramfs.ops_per_sec on: commit: ec5ee5417b00278fa050b38d878b76f1365420fb ("rcu: Advance callbacks for expedited GP completion in rcu_core()") 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: 256 threads 2 sockets Intel(R) Xeon(R) 6768P CPU @ 2.4GHz (Granite Rapids) with 64G memory parameters: nr_threads: 100% testtime: 60s test: ramfs cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260924/202609241934.228b4a14-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/ramfs/stress-ng/60s commit: fde2b18817 ("rcu: Detect expedited grace period completion in rcu_pending()") ec5ee5417b ("rcu: Advance callbacks for expedited GP completion in rcu_core()") fde2b18817e4f32b ec5ee5417b00278fa050b38d878 ---------------- --------------------------- %stddev %change %stddev \ | \ 427110 +25.7% 537009 stress-ng.ramfs.ops 7124 +25.7% 8957 stress-ng.ramfs.ops_per_sec 6004 ± 2% +561.7% 39731 stress-ng.time.involuntary_context_switches 685.50 -5.1% 650.33 stress-ng.time.percent_of_cpu_this_job_got 405.23 -5.4% 383.53 stress-ng.time.system_time 776758 +19.9% 931227 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