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X-CSE-ConnectionGUID: jso7RA8xQFGK4YVpPZGGsQ== X-CSE-MsgGUID: CVSgSHlwQF+Tm0oS6twbcg== X-IronPort-AV: E=McAfee;i="6800,10657,11929"; a="201180" X-IronPort-AV: E=Sophos;i="6.27,147,1787036400"; d="scan'208";a="201180" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Oct 2026 23:39:06 -0700 X-CSE-ConnectionGUID: Tpg1035cT+e4bln+P7KYGQ== X-CSE-MsgGUID: bqsZdNQwSJi7cq+Du3SAZw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,147,1787036400"; d="scan'208";a="244059" 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 23:39:06 -0700 Date: Fri, 9 Oct 2026 14:39:02 +0800 From: kernel test robot To: Harry Yoo Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-mm@kvack.org, yi1.lai@intel.com Subject: [harry:b4/sheaf-size-round-up] [mm/slab] ddf56dfc79: will-it-scale.per_process_ops 54.5% improvement Message-ID: <202610091451.beda4ec3-lkp@intel.com> Precedence: bulk X-Mailing-List: oe-lkp@lists.linux.dev 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 54.5% improvement of will-it-scale.per_process_ops on: commit: ddf56dfc79f5734d7b3aa8ba81f195d52b3e5823 ("mm/slab: round up sheaf size to kmalloc size for explicit sheaf_capacity") https://git.kernel.org/cgit/linux/kernel/git/harry/linux.git b4/sheaf-size-round-up testcase: will-it-scale 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_task: 100% mode: process test: brk2 cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20261009/202610091451.beda4ec3-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase: gcc-14/performance/x86_64-rhel-9.4/process/100%/debian-13-x86_64-20250902.cgz/lkp-srf-2sp1/brk2/will-it-scale commit: 675a745c61 ("EDITME: cover title for sheaf-size-round-up") ddf56dfc79 ("mm/slab: round up sheaf size to kmalloc size for explicit sheaf_capacity") 675a745c6113e420 ddf56dfc79f5734d7b3aa8ba81f ---------------- --------------------------- %stddev %change %stddev \ | \ 70440501 +54.5% 1.089e+08 will-it-scale.256.processes 0.30 ± 3% +35.9% 0.41 ± 8% will-it-scale.256.processes_idle 275157 +54.5% 425248 will-it-scale.per_process_ops 70440501 +54.5% 1.089e+08 will-it-scale.workload 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