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X-CSE-ConnectionGUID: WcnY8vh5QS2bXkXhI+h/jQ== X-CSE-MsgGUID: cgAi3CI3T3Ovp1lw4fQXcg== X-IronPort-AV: E=McAfee;i="6800,10657,11929"; a="215489" X-IronPort-AV: E=Sophos;i="6.27,147,1787036400"; d="scan'208";a="215489" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Oct 2026 20:30:39 -0700 X-CSE-ConnectionGUID: gKEfUMn3QGSKSWQrk9hvsw== X-CSE-MsgGUID: v4Hf0qCsQx+mHt6yBcX4VA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,147,1787036400"; d="scan'208";a="654599" 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; 08 Oct 2026 20:30:36 -0700 Date: Fri, 9 Oct 2026 11:30:33 +0800 From: kernel test robot To: Tim Chen Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, Ingo Molnar , Hyunwoo Kim , Zenghui Yu , Chen Yu , Peter Zijlstra , linux-mm@kvack.org, aubrey.li@linux.intel.com, yi1.lai@intel.com Subject: [linus:master] [sched/cache] 28f9c0e0a0: stress-ng.fd-race.ops_per_sec 5.2% improvement Message-ID: <202610091149.c00cf9f2-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 5.2% improvement of stress-ng.fd-race.ops_per_sec on: commit: 28f9c0e0a0b94c5d3e1b634db545f6e1f94858c5 ("sched/cache: Decouple sched_cache_group from mm to fix UAF") 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 GENUINE INTEL(R) XEON(R) (Sierra Forest) with 128G memory parameters: nr_threads: 100% testtime: 60s test: fd-race cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20261009/202610091149.c00cf9f2-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-srf-2sp1/fd-race/stress-ng/60s commit: d6013e2465 ("sched/cache: Honor migrate_llc_task semantics in active load balance, to fix LLC mis-scheduling bug") 28f9c0e0a0 ("sched/cache: Decouple sched_cache_group from mm to fix UAF") d6013e2465d98d52 28f9c0e0a0b94c5d3e1b634db54 ---------------- --------------------------- %stddev %change %stddev \ | \ 28370042 +5.2% 29834431 stress-ng.fd-race.ops 473267 +5.2% 497702 stress-ng.fd-race.ops_per_sec 843367 +27.1% 1072325 stress-ng.time.voluntary_context_switches 62132 +7.1% 66565 ± 4% meminfo.PageTables 48712422 ± 4% +8.4% 52824690 ± 2% cpuidle.C1E.time 62293414 ± 2% +9.0% 67917882 ± 3% cpuidle.C6S.time 68069 ± 2% +9.6% 74599 ± 3% cpuidle.C6S.usage 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