Greeting,
FYI, we noticed a 5.2% improvement of blogbench.write_score due to commit:
commit: 19957a181608d25c8f4136652d0ea00b3738972d ("xfs: Correctly invert xfs_buftarg LRU isolation logic")
https://git.kernel.org/cgit/fs/xfs/xfs-linux.git xfs-4.17-merge
in testcase: blogbench
on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 8G memory
with following parameters:
disk: 1SSD
fs: xfs
cpufreq_governor: performance
test-description: Blogbench is a portable filesystem benchmark that tries to reproduce the load of a real-world busy file server.
test-url: https://www.pureftpd.org/project/blogbench
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
=========================================================================================
compiler/cpufreq_governor/disk/fs/kconfig/rootfs/tbox_group/testcase:
gcc-7/performance/1SSD/xfs/x86_64-rhel-7.2/debian-x86_64-2016-08-31.cgz/lkp-bdw-de1/blogbench
commit:
4df0f7f145 ("xfs: fix transaction allocation deadlock in IO path")
19957a1816 ("xfs: Correctly invert xfs_buftarg LRU isolation logic")
4df0f7f145f2ac14 19957a181608d25c8f4136652d
---------------- --------------------------
%stddev %change %stddev
\ | \
10702 +5.2% 11259 blogbench.write_score
76694732 -12.2% 67350219 blogbench.time.file_system_inputs
76001327 +5.4% 80102749 blogbench.time.file_system_outputs
661724 -3.2% 640345 blogbench.time.involuntary_context_switches
578.00 -1.2% 571.20 blogbench.time.percent_of_cpu_this_job_got
1603 -1.1% 1585 blogbench.time.system_time
3413089 -8.1% 3138095 blogbench.time.voluntary_context_switches
1.42 ? 5% -45.0% 0.78 ? 6% turbostat.CPU%c6
128458 -12.8% 112013 vmstat.io.bi
144255 +7.8% 155524 vmstat.io.bo
36242 -4.6% 34586 vmstat.system.cs
25403 -2.2% 24852 vmstat.system.in
2.13 +0.0 2.15 perf-stat.branch-miss-rate%
1.078e+11 -1.5% 1.062e+11 perf-stat.cache-misses
1.078e+11 -1.5% 1.062e+11 perf-stat.cache-references
10993347 -4.7% 10482153 perf-stat.context-switches
2.09 -1.1% 2.07 perf-stat.cpi
329741 -9.2% 299471 perf-stat.cpu-migrations
0.48 +1.1% 0.48 perf-stat.ipc
2468477 ? 31% -50.9% 1212905 ? 32% proc-vmstat.compact_daemon_free_scanned
2468726 ? 31% -50.7% 1216044 ? 31% proc-vmstat.compact_free_scanned
2923481 -13.6% 2527242 proc-vmstat.kswapd_inodesteal
1837 ? 5% -16.7% 1530 ? 4% proc-vmstat.kswapd_low_wmark_hit_quickly
1707 ? 7% +16.6% 1989 ? 6% proc-vmstat.nr_writeback
2536 ? 3% -10.8% 2262 ? 2% proc-vmstat.pageoutrun
38900337 -12.7% 33941396 proc-vmstat.pgpgin
813055 ? 3% -12.7% 709846 ? 2% proc-vmstat.workingset_activate
1041709 ? 2% -10.4% 932898 proc-vmstat.workingset_refault
2331 -12.0% 2052 slabinfo.kmalloc-2048.active_objs
2568 ? 2% -12.6% 2244 ? 2% slabinfo.kmalloc-2048.num_objs
749.80 ? 2% -15.0% 637.20 ? 2% slabinfo.kmalloc-4096.active_objs
860.50 ? 2% -15.1% 730.60 ? 3% slabinfo.kmalloc-4096.num_objs
25369 ? 2% +12.1% 28440 ? 3% slabinfo.kmalloc-512.num_objs
1051 ? 2% -15.2% 891.80 ? 2% slabinfo.kmalloc-8192.active_objs
1131 ? 2% -16.2% 947.90 ? 2% slabinfo.kmalloc-8192.num_objs
18441 +16.3% 21452 slabinfo.mnt_cache.active_objs
19600 +14.6% 22462 slabinfo.mnt_cache.num_objs
5358 ? 3% -27.5% 3886 ? 4% slabinfo.pool_workqueue.active_objs
6708 ? 4% -25.8% 4974 ? 6% slabinfo.pool_workqueue.num_objs
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.
Thanks,
Xiaolong