From: kernel test robot <yi1.lai@intel.com>
To: Tim Chen <tim.c.chen@linux.intel.com>
Cc: oe-lkp@lists.linux.dev, lkp@intel.com,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Hyunwoo Kim <imv4bel@gmail.com>,
Zenghui Yu <zenghui.yu@linux.dev>, Chen Yu <yu.c.chen@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
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
Date: Fri, 9 Oct 2026 11:30:33 +0800 [thread overview]
Message-ID: <202610091149.c00cf9f2-lkp@intel.com> (raw)
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
reply other threads:[~2026-10-09 3:31 UTC|newest]
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