Hello,
kernel test robot noticed a 2.9% improvement of stress-ng.dir.ops_per_sec on:
commit: f880fe6e0b4b127d6e2a007fe68bdf5651677ae2 ("btrfs: don't hold an extra reference for redirtied buffers")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
testcase: stress-ng
test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-9980XE CPU @ 3.00GHz (Skylake) with 32G memory
parameters:
nr_threads: 10%
disk: 1SSD
testtime: 60s
fs: btrfs
class: filesystem
test: dir
cpufreq_governor: performance
Details are as below:
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To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
sudo bin/lkp install job.yaml # job file is attached in this email
bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
sudo bin/lkp run generated-yaml-file
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
=========================================================================================
class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
filesystem/gcc-12/performance/1SSD/btrfs/x86_64-rhel-8.3/10%/debian-11.1-x86_64-20220510.cgz/lkp-skl-d08/dir/stress-ng/60s
commit:
f18cc97845 ("btrfs: fix dirty_metadata_bytes for redirtied buffers")
f880fe6e0b ("btrfs: don't hold an extra reference for redirtied buffers")
f18cc97845aa4ae0 f880fe6e0b4b127d6e2a007fe68
---------------- ---------------------------
%stddev %change %stddev
\ | \
0.95 -0.0 0.92 turbostat.POLL%
288182 -2.8% 280247 perf-stat.i.context-switches
283597 -2.7% 275809 perf-stat.ps.context-switches
0.17 ? 8% -0.0 0.14 ? 7% perf-profile.children.cycles-pp.asm_sysvec_call_function_single
0.47 ? 6% +0.1 0.54 ? 7% perf-profile.children.cycles-pp.kmem_cache_free
0.44 ? 6% +0.1 0.50 ? 7% perf-profile.self.cycles-pp.kmem_cache_free
13163 ? 7% +14.0% 15004 ? 5% vmstat.io.bo
276099 -2.6% 269003 vmstat.system.cs
71063 -2.1% 69559 vmstat.system.in
2768594 +2.8% 2845876 stress-ng.dir.ops
45973 +2.9% 47299 stress-ng.dir.ops_per_sec
3433450 ? 3% +7.4% 3687242 ? 2% stress-ng.time.file_system_outputs
7849247 -3.2% 7594350 stress-ng.time.voluntary_context_switches
84934 -2.7% 82635 proc-vmstat.nr_active_anon
502830 ? 3% +7.2% 539258 ? 2% proc-vmstat.nr_dirtied
94444 -2.6% 92017 proc-vmstat.nr_shmem
22572 +1.9% 23003 proc-vmstat.nr_slab_unreclaimable
214997 ? 7% +13.7% 244559 ? 6% proc-vmstat.nr_written
84934 -2.7% 82635 proc-vmstat.nr_zone_active_anon
864336 ? 7% +13.7% 983045 ? 6% proc-vmstat.pgpgout
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