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a="2917651" X-IronPort-AV: E=Sophos;i="6.27,205,1787036400"; d="scan'208";a="2917651" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Nov 2026 21:55:32 -0800 X-CSE-ConnectionGUID: LcEW59E0QuehKVntU1UV3A== X-CSE-MsgGUID: c7XNTJf3QdG48TPU0eC1yQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,205,1787036400"; d="scan'208";a="8366056" Received: from ly-workstation.sh.intel.com (HELO ly-workstation) ([10.239.182.64]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Nov 2026 21:55:31 -0800 Date: Tue, 10 Nov 2026 13:55:27 +0800 From: kernel test robot To: Tejun Heo Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, Yao Kai , yi1.lai@intel.com Subject: [linus:master] [workqueue] f1639cde5f: stress-ng.io.ops_per_sec 9.9% improvement Message-ID: <202611100656.fcd6dc19-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 9.9% improvement of stress-ng.io.ops_per_sec on: commit: f1639cde5f5c1bee25498ef988227ee8cf5ddb04 ("workqueue: Make flush_workqueue() visit only pwqs active since the last flush") 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) (Sapphire Rapids) with 128G memory parameters: nr_threads: 100% disk: 1SSD testtime: 60s fs: xfs test: io cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20261110/202611100656.fcd6dc19-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime: gcc-14/performance/1SSD/xfs/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-spr-2sp3/io/stress-ng/60s commit: 31e33de1f4 ("workqueue: Maintain pwq->total_in_flight") f1639cde5f ("workqueue: Make flush_workqueue() visit only pwqs active since the last flush") 31e33de1f4e159c7 f1639cde5f5c1bee25498ef9882 ---------------- --------------------------- %stddev %change %stddev \ | \ 260170 ± 3% +9.9% 285895 ± 4% stress-ng.io.ops 4337 ± 3% +9.9% 4766 ± 4% stress-ng.io.ops_per_sec 6244092 ± 3% +9.9% 6861492 ± 4% stress-ng.time.file_system_outputs 4547 ± 7% -15.8% 3826 ± 4% stress-ng.time.involuntary_context_switches 3320 ± 3% -17.5% 2739 ± 5% stress-ng.time.percent_of_cpu_this_job_got 1995 ± 3% -17.5% 1645 ± 5% stress-ng.time.system_time 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