From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============6361309611023103884==" MIME-Version: 1.0 From: Yin Fengwei To: lkp@lists.01.org Subject: Re: [xfs] 2bf1ec0ff0: stress-ng.mknod.ops_per_sec -45.4% regression Date: Thu, 09 Sep 2021 15:07:35 +0800 Message-ID: In-Reply-To: List-Id: --===============6361309611023103884== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Hi Dave, On 9/3/2021 3:43 PM, Xing Zhengjun wrote: > Hi Dave, > = > =C2=A0=C2=A0 Do you have time to look at this? Thanks. > = > On 8/4/2021 10:38 PM, kernel test robot wrote: >> >> >> Greeting, >> >> FYI, we noticed a -45.4% regression of stress-ng.mknod.ops_per_sec due t= o commit: >> >> >> commit: 2bf1ec0ff067ff8f692d261b29c713f3583f7e2a ("xfs: log forces imply= data device cache flushes") >> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master We noticed the commit 2bf1ec0ff067ff8f692d261b29c713f3583f7e2a is actually a fix to the race introduced by commit eef983ffeae7a1cdde8c3338155ae2dd74b862= 1b. Then we did a test for stress-ng.mknod.ops_per_sec between commit: eef983ffeae7a1cdde8c3338155ae2dd74b8621b and its parent commit: 3468bb1ca6e8840789e13c7b9d8b0c556b4fbe79 We got: commit: = 3468bb1ca6e8840789e13c7b9d8b0c556b4fbe79 eef983ffeae7a1cdde8c3338155ae2dd74b8621b 3468bb1ca6e88407 eef983ffeae7a1cdde8c3338155 = ---------------- --------------------------- = fail:runs %reproduction fail:runs | | | = 112:1 456% 117:1 dmesg.timestamp:last 103:1 553% 109:1 kmsg.timestamp:last 1:1 0% 1:1 pmeter.pmeter.fail 1:1 0% 1:1 stress-ng.mknod.pass %stddev %change %stddev \ | \ = 47979 +80.6% 86655 stress-ng.mknod.ops 799.29 +80.6% 1443 stress-ng.mknod.ops_per_sec It's like commit eef983ffeae7a1cdde8c3338155ae2dd74b8621b bought 80% performance gain. But it introduced race issue. Commit 2bf1ec0ff067ff8f692d261b29c713f3583f7e2a fixed the race issue and lost about 50% performance gain. Suppose we still have 30% performance gain with race issue fixed. So it's still a good change. We will close this report. Regards Yin, Fengwei >> >> >> in testcase: stress-ng >> on test machine: 96 threads 2 sockets Intel(R) Xeon(R) Gold 6252 CPU @ 2= .10GHz with 512G memory >> with following parameters: >> >> =C2=A0=C2=A0=C2=A0=C2=A0nr_threads: 10% >> =C2=A0=C2=A0=C2=A0=C2=A0disk: 1HDD >> =C2=A0=C2=A0=C2=A0=C2=A0testtime: 60s >> =C2=A0=C2=A0=C2=A0=C2=A0fs: xfs >> =C2=A0=C2=A0=C2=A0=C2=A0class: filesystem >> =C2=A0=C2=A0=C2=A0=C2=A0test: mknod >> =C2=A0=C2=A0=C2=A0=C2=A0cpufreq_governor: performance >> =C2=A0=C2=A0=C2=A0=C2=A0ucode: 0x5003006 >> >> >> >> >> If you fix the issue, kindly add following tag >> Reported-by: kernel test robot >> >> >> Details are as below: >> ------------------------------------------------------------------------= --------------------------> >> >> >> To reproduce: >> >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 git clone https://githu= b.com/intel/lkp-tests.git >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 cd lkp-tests >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 bin/lkp install=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0 job.yaml=C2=A0 # job file is attached in this email >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 bin/lkp split-job --com= patible job.yaml=C2=A0 # generate the yaml file for lkp run >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 bin/lkp run=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 generated-yaml-file >> >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_g= roup/test/testcase/testtime/ucode: >> =C2=A0=C2=A0 filesystem/gcc-9/performance/1HDD/xfs/x86_64-rhel-8.3/10%/d= ebian-10.4-x86_64-20200603.cgz/lkp-csl-2sp7/mknod/stress-ng/60s/0x5003006 >> >> commit: >> =C2=A0=C2=A0 45eddb4140 ("xfs: factor out forced iclog flushes") >> =C2=A0=C2=A0 2bf1ec0ff0 ("xfs: log forces imply data device cache flushe= s") >> >> 45eddb414047c366 2bf1ec0ff067ff8f692d261b29c >> ---------------- --------------------------- >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 %stddev=C2=A0=C2= =A0=C2=A0=C2=A0 %change=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 %st= ddev >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 \=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 \ >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 87135=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 -45.4%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 47612=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 stress-ng.mknod.ops >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1451=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -45.4%=C2=A0=C2=A0=C2=A0=C2=A0 793.24=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 stress-ng.mknod.ops_per_sec >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 23.00 =C2=B1=C2=A0 7%=C2=A0=C2=A0=C2=A0= =C2=A0 -51.4%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 11.17 =C2=B1 12%=C2=A0 stress-n= g.time.percent_of_cpu_this_job_got >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 13.80 =C2=B1=C2=A0 7%=C2=A0=C2=A0=C2=A0= =C2=A0 -50.7%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 6.80 =C2=B1=C2=A0 8%=C2= =A0 stress-ng.time.system_time >> =C2=A0=C2=A0=C2=A0=C2=A0 211458 =C2=B1=C2=A0 2%=C2=A0=C2=A0=C2=A0=C2=A0 = -62.4%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 79605 =C2=B1 14%=C2=A0 stress-ng.time.= voluntary_context_switches >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.30 =C2=B1=C2=A0 2%=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 -0.1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.18=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 mpstat.cpu.all.sys% >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 13993 =C2=B1=C2=A0 2%=C2=A0=C2=A0=C2=A0= =C2=A0 -38.1%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 8659=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 softirqs.BLOCK >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 27747=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -2.3%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 27103=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 proc-vmstat.nr_slab_reclaimable >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 76223 =C2=B1=C2=A0 3%=C2=A0=C2=A0=C2=A0= =C2=A0 -57.3%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 32548 =C2=B1=C2=A0 5%=C2=A0 pro= c-vmstat.pgpgout >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1170 =C2=B1=C2=A0 3%=C2=A0=C2=A0=C2= =A0=C2=A0 -57.3%=C2=A0=C2=A0=C2=A0=C2=A0 500.17 =C2=B1=C2=A0 5%=C2=A0 vmsta= t.io.bo >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 10752=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 -47.7%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 5624 = =C2=B1=C2=A0 6%=C2=A0 vmstat.system.cs >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 32820=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 -34.5%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 21499=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 slabinfo.kmalloc-rcl-64.active_objs >> =C2=A0=C2=A0=C2=A0=C2=A0 512.67=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 -34.6%=C2=A0=C2=A0=C2=A0=C2=A0 335.50=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 slabinfo.kmalloc-rcl-64.active_slabs >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 32836=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 -34.5%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 21508=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 slabinfo.kmalloc-rcl-64.num_objs >> =C2=A0=C2=A0=C2=A0=C2=A0 512.67=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 -34.6%=C2=A0=C2=A0=C2=A0=C2=A0 335.50=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 slabinfo.kmalloc-rcl-64.num_slabs >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 24913 =C2=B1=C2=A0 2%=C2=A0=C2=A0=C2=A0= =C2=A0 -42.8%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 14251=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0 interrupts.315:PCI-MSI.376832-edge.ahci[0000:00:17.0] >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 71844 =C2=B1=C2=A0 6%=C2=A0=C2=A0=C2=A0= =C2=A0 -19.9%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 57564 =C2=B1=C2=A0 3%=C2=A0 int= errupts.CAL:Function_call_interrupts >> =C2=A0=C2=A0=C2=A0=C2=A0 206.50 =C2=B1 37%=C2=A0=C2=A0=C2=A0=C2=A0 -42.9= %=C2=A0=C2=A0=C2=A0=C2=A0 118.00 =C2=B1 41%=C2=A0 interrupts.CPU1.NMI:Non-m= askable_interrupts >> =C2=A0=C2=A0=C2=A0=C2=A0 206.50 =C2=B1 37%=C2=A0=C2=A0=C2=A0=C2=A0 -42.9= %=C2=A0=C2=A0=C2=A0=C2=A0 118.00 =C2=B1 41%=C2=A0 interrupts.CPU1.PMI:Perfo= rmance_monitoring_interrupts >> =C2=A0=C2=A0=C2=A0=C2=A0 173.17 =C2=B1 26%=C2=A0=C2=A0=C2=A0=C2=A0 -31.7= %=C2=A0=C2=A0=C2=A0=C2=A0 118.33 =C2=B1 38%=C2=A0 interrupts.CPU2.NMI:Non-m= askable_interrupts >> =C2=A0=C2=A0=C2=A0=C2=A0 173.17 =C2=B1 26%=C2=A0=C2=A0=C2=A0=C2=A0 -31.7= %=C2=A0=C2=A0=C2=A0=C2=A0 118.33 =C2=B1 38%=C2=A0 interrupts.CPU2.PMI:Perfo= rmance_monitoring_interrupts >> =C2=A0=C2=A0=C2=A0=C2=A0 189.83 =C2=B1 34%=C2=A0=C2=A0=C2=A0=C2=A0 -40.6= %=C2=A0=C2=A0=C2=A0=C2=A0 112.83 =C2=B1 25%=C2=A0 interrupts.CPU49.NMI:Non-= maskable_interrupts >> =C2=A0=C2=A0=C2=A0=C2=A0 189.83 =C2=B1 34%=C2=A0=C2=A0=C2=A0=C2=A0 -40.6= %=C2=A0=C2=A0=C2=A0=C2=A0 112.83 =C2=B1 25%=C2=A0 interrupts.CPU49.PMI:Perf= ormance_monitoring_interrupts >> =C2=A0=C2=A0=C2=A0=C2=A0 181.67 =C2=B1 25%=C2=A0=C2=A0=C2=A0=C2=A0 -38.3= %=C2=A0=C2=A0=C2=A0=C2=A0 112.17 =C2=B1 24%=C2=A0 interrupts.CPU50.NMI:Non-= maskable_interrupts >> =C2=A0=C2=A0=C2=A0=C2=A0 181.67 =C2=B1 25%=C2=A0=C2=A0=C2=A0=C2=A0 -38.3= %=C2=A0=C2=A0=C2=A0=C2=A0 112.17 =C2=B1 24%=C2=A0 interrupts.CPU50.PMI:Perf= ormance_monitoring_interrupts >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1895 =C2=B1 16%=C2=A0=C2=A0=C2=A0= =C2=A0 -32.8%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1274 =C2=B1 20%=C2=A0 int= errupts.RES:Rescheduling_interrupts >> =C2=A0 3.127e+08 =C2=B1=C2=A0 5%=C2=A0=C2=A0=C2=A0=C2=A0 -12.2%=C2=A0 2.= 746e+08 =C2=B1=C2=A0 3%=C2=A0 perf-stat.i.branch-instructions >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 10683=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 -49.8%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 5364 = =C2=B1=C2=A0 6%=C2=A0 perf-stat.i.context-switches >> =C2=A0 3.866e+08 =C2=B1=C2=A0 4%=C2=A0=C2=A0=C2=A0=C2=A0 -14.2%=C2=A0 3.= 318e+08 =C2=B1=C2=A0 3%=C2=A0 perf-stat.i.dTLB-loads >> =C2=A0 1.949e+08 =C2=B1=C2=A0 3%=C2=A0=C2=A0=C2=A0=C2=A0 -14.7%=C2=A0 1.= 662e+08 =C2=B1=C2=A0 3%=C2=A0 perf-stat.i.dTLB-stores >> =C2=A0 1.538e+09 =C2=B1=C2=A0 5%=C2=A0=C2=A0=C2=A0=C2=A0 -12.4%=C2=A0 1.= 348e+09 =C2=B1=C2=A0 3%=C2=A0 perf-stat.i.instructions >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 9.31 =C2=B1=C2=A0 4%=C2=A0=C2=A0=C2= =A0=C2=A0 -13.6%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 8.04 =C2=B1=C2=A0 3%= =C2=A0 perf-stat.i.metric.M/sec >> =C2=A0=C2=A0=C2=A0=C2=A0 127426 =C2=B1 14%=C2=A0=C2=A0=C2=A0=C2=A0 -32.6= %=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 85864 =C2=B1=C2=A0 9%=C2=A0 perf-stat.i.nod= e-load-misses >> =C2=A0 3.078e+08 =C2=B1=C2=A0 5%=C2=A0=C2=A0=C2=A0=C2=A0 -12.2%=C2=A0 2.= 702e+08 =C2=B1=C2=A0 3%=C2=A0 perf-stat.ps.branch-instructions >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 10512=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 -49.8%=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 5279 = =C2=B1=C2=A0 6%=C2=A0 perf-stat.ps.context-switches >> =C2=A0 3.805e+08 =C2=B1=C2=A0 4%=C2=A0=C2=A0=C2=A0=C2=A0 -14.2%=C2=A0 3.= 265e+08 =C2=B1=C2=A0 3%=C2=A0 perf-stat.ps.dTLB-loads >> =C2=A0 1.918e+08 =C2=B1=C2=A0 3%=C2=A0=C2=A0=C2=A0=C2=A0 -14.7%=C2=A0 1.= 635e+08 =C2=B1=C2=A0 3%=C2=A0 perf-stat.ps.dTLB-stores >> =C2=A0 1.514e+09 =C2=B1=C2=A0 5%=C2=A0=C2=A0=C2=A0=C2=A0 -12.4%=C2=A0 1.= 327e+09 =C2=B1=C2=A0 3%=C2=A0 perf-stat.ps.instructions >> =C2=A0=C2=A0=C2=A0=C2=A0 125399 =C2=B1 14%=C2=A0=C2=A0=C2=A0=C2=A0 -32.6= %=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 84480 =C2=B1=C2=A0 9%=C2=A0 perf-stat.ps.no= de-load-misses >> =C2=A0 9.563e+10 =C2=B1=C2=A0 6%=C2=A0=C2=A0=C2=A0=C2=A0 -12.3%=C2=A0 8.= 383e+10 =C2=B1=C2=A0 3%=C2=A0 perf-stat.total.instructions >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 8.31 =C2=B1 20%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -3.9=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 4.45 =C2=B1 25%= =C2=A0 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 8.30 =C2=B1 20%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -3.9=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 4.45 =C2=B1 25%= =C2=A0 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_afte= r_hwframe >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2.35 =C2=B1 19%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -1.6=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.75 =C2=B1 25%= =C2=A0 perf-profile.calltrace.cycles-pp.__x64_sys_sync.do_syscall_64.entry_= SYSCALL_64_after_hwframe >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2.35 =C2=B1 19%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -1.6=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.75 =C2=B1 25%= =C2=A0 perf-profile.calltrace.cycles-pp.ksys_sync.__x64_sys_sync.do_syscall= _64.entry_SYSCALL_64_after_hwframe >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2.08 =C2=B1 19%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -1.6=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.50 =C2=B1 72%= =C2=A0 perf-profile.calltrace.cycles-pp.iterate_supers.ksys_sync.__x64_sys_= sync.do_syscall_64.entry_SYSCALL_64_after_hwframe >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.85 =C2=B1 25%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.14 =C2=B1 31%= =C2=A0 perf-profile.calltrace.cycles-pp.do_mknodat.do_syscall_64.entry_SYSC= ALL_64_after_hwframe >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.04 =C2=B1 27%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.36 =C2=B1106%= =C2=A0 perf-profile.calltrace.cycles-pp.xfs_inactive_ifree.xfs_inactive.xfs= _fs_destroy_inode.destroy_inode.do_unlinkat >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.08 =C2=B1 27%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.6=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.46 =C2=B1 77%= =C2=A0 perf-profile.calltrace.cycles-pp.destroy_inode.do_unlinkat.do_syscal= l_64.entry_SYSCALL_64_after_hwframe >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.05 =C2=B1 27%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.6=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.45 =C2=B1 77%= =C2=A0 perf-profile.calltrace.cycles-pp.xfs_fs_destroy_inode.destroy_inode.= do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.04 =C2=B1 27%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.6=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.44 =C2=B1 78%= =C2=A0 perf-profile.calltrace.cycles-pp.xfs_inactive.xfs_fs_destroy_inode.d= estroy_inode.do_unlinkat.do_syscall_64 >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.89 =C2=B1 17%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.3=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.58 =C2=B1=C2= =A0 9%=C2=A0 perf-profile.calltrace.cycles-pp.worker_thread.kthread.ret_fro= m_fork >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.21 =C2=B1=C2=A0 8%=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 +0.2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.45 =C2=B1= =C2=A0 7%=C2=A0 perf-profile.calltrace.cycles-pp.perf_mux_hrtimer_handler._= _hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_= apic_timer_interrupt >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 8.13 =C2=B1=C2=A0 9%=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 +2.0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 10.16 =C2=B1=C2=A0= 6%=C2=A0 perf-profile.calltrace.cycles-pp.__hrtimer_run_queues.hrtimer_int= errupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec= _apic_timer_interrupt >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2.35 =C2=B1 19%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -1.6=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.75 =C2=B1 25%= =C2=A0 perf-profile.children.cycles-pp.__x64_sys_sync >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2.35 =C2=B1 19%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -1.6=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.75 =C2=B1 25%= =C2=A0 perf-profile.children.cycles-pp.ksys_sync >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2.09 =C2=B1 19%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -1.4=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.65 =C2=B1 25%= =C2=A0 perf-profile.children.cycles-pp.iterate_supers >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2.25 =C2=B1 18%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -1.1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.14 =C2=B1 26%= =C2=A0 perf-profile.children.cycles-pp._raw_spin_lock >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.40 =C2=B1 25%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -1.1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.31 =C2=B1 54%= =C2=A0 perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.85 =C2=B1 25%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.14 =C2=B1 31%= =C2=A0 perf-profile.children.cycles-pp.do_mknodat >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.08 =C2=B1 27%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.5=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.55 =C2=B1 43%= =C2=A0 perf-profile.children.cycles-pp.destroy_inode >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.05 =C2=B1 27%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.5=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.54 =C2=B1 42%= =C2=A0 perf-profile.children.cycles-pp.xfs_fs_destroy_inode >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.04 =C2=B1 27%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.5=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.54 =C2=B1 43%= =C2=A0 perf-profile.children.cycles-pp.xfs_inactive >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.04 =C2=B1 27%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.5=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.53 =C2=B1 44%= =C2=A0 perf-profile.children.cycles-pp.xfs_inactive_ifree >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.93 =C2=B1 21%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.5=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.44 =C2=B1 24%= =C2=A0 perf-profile.children.cycles-pp.__schedule >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.49 =C2=B1 25%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.4=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.11 =C2=B1 76%= =C2=A0 perf-profile.children.cycles-pp.pick_next_task_fair >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.05 =C2=B1 20%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.4=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.69 =C2=B1 13%= =C2=A0 perf-profile.children.cycles-pp.find_busiest_group >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.66 =C2=B1 19%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.3=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.32 =C2=B1 30%= =C2=A0 perf-profile.children.cycles-pp.schedule >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1.00 =C2=B1 20%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.3=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.65 =C2=B1 13%= =C2=A0 perf-profile.children.cycles-pp.update_sd_lb_stats >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.60 =C2=B1 20%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.3=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.29 =C2=B1 31%= =C2=A0 perf-profile.children.cycles-pp.xfs_ifree >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.89 =C2=B1 17%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.3=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.58 =C2=B1=C2= =A0 9%=C2=A0 perf-profile.children.cycles-pp.worker_thread >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.44 =C2=B1 26%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.3=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.16 =C2=B1 45%= =C2=A0 perf-profile.children.cycles-pp.newidle_balance >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.49 =C2=B1 39%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.3=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.22 =C2=B1 35%= =C2=A0 perf-profile.children.cycles-pp.xfs_fs_sync_fs >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.40 =C2=B1 49%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.17 =C2=B1 29%= =C2=A0 perf-profile.children.cycles-pp.xfs_log_force >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.31 =C2=B1 29%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.11 =C2=B1 56%= =C2=A0 perf-profile.children.cycles-pp.schedule_timeout >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.24 =C2=B1 60%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.06 =C2=B1 50%= =C2=A0 perf-profile.children.cycles-pp.xfs_inobt_get_rec >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.38 =C2=B1 19%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.21 =C2=B1 30%= =C2=A0 perf-profile.children.cycles-pp.xfs_btree_lookup >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.42 =C2=B1 14%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.26 =C2=B1 35%= =C2=A0 perf-profile.children.cycles-pp.xfs_check_agi_freecount >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.30 =C2=B1 27%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.14 =C2=B1 37%= =C2=A0 perf-profile.children.cycles-pp.xfs_btree_lookup_get_block >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.25 =C2=B1 30%=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 -0.1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0.10 =C2=B1 39%= 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=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= | >> =C2=A0=C2=A0=C2=A0 900 |-+=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | >> =C2=A0=C2=A0=C2=A0 800 |-+=C2=A0=C2=A0 O O=C2=A0=C2=A0 O O O=C2=A0=C2=A0= =C2=A0=C2=A0 O O=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 O=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0 O O=C2=A0=C2=A0=C2=A0=C2=A0 O O O=C2=A0=C2=A0=C2=A0=C2=A0 O=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | O O=C2=A0=C2=A0=C2=A0=C2=A0= O=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 O O=C2=A0=C2=A0=C2=A0=C2=A0 O O O=C2= =A0=C2=A0=C2=A0 O O=C2=A0=C2=A0=C2=A0=C2=A0 O O=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0 O O=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 | >> =C2=A0=C2=A0=C2=A0 700 +------------------------------------------------= --------------------+ >> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= 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Any difference in system hardware or so= ftware >> design or configuration may affect actual performance. >> >> >> --- >> 0DAY/LKP+ Test Infrastructure=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Open Sou= rce Technology Center >> https://lists.01.org/hyperkitty/list/lkp(a)lists.01.org=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 Intel Corporation >> >> Thanks, >> Oliver Sang >> >=20 --===============6361309611023103884==-- From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,MSGID_FROM_MTA_HEADER,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 755A3C433F5 for ; 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dkim=none (message not signed) header.d=none;intel.com; dmarc=none action=none header.from=intel.com; Received: from CO1PR11MB4820.namprd11.prod.outlook.com (2603:10b6:303:6f::8) by MWHPR11MB1358.namprd11.prod.outlook.com (2603:10b6:300:23::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4500.14; Thu, 9 Sep 2021 07:07:42 +0000 Received: from CO1PR11MB4820.namprd11.prod.outlook.com ([fe80::44d8:67f3:8883:dec7]) by CO1PR11MB4820.namprd11.prod.outlook.com ([fe80::44d8:67f3:8883:dec7%3]) with mapi id 15.20.4500.016; Thu, 9 Sep 2021 07:07:42 +0000 Subject: Re: [LKP] Re: [xfs] 2bf1ec0ff0: stress-ng.mknod.ops_per_sec -45.4% regression To: Xing Zhengjun , kernel test robot , Dave Chinner CC: "Darrick J. Wong" , Christoph Hellwig , LKML , , References: <20210804143800.GA21457@xsang-OptiPlex-9020> From: Yin Fengwei Message-ID: Date: Thu, 9 Sep 2021 15:07:35 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.14.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-ClientProxiedBy: HK2PR03CA0051.apcprd03.prod.outlook.com (2603:1096:202:17::21) To CO1PR11MB4820.namprd11.prod.outlook.com (2603:10b6:303:6f::8) MIME-Version: 1.0 Received: from [10.238.3.74] (192.198.143.17) by HK2PR03CA0051.apcprd03.prod.outlook.com (2603:1096:202:17::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4500.7 via Frontend Transport; Thu, 9 Sep 2021 07:07:40 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 6c037bd3-6b48-40c6-dbe9-08d973608431 X-MS-TrafficTypeDiagnostic: MWHPR11MB1358: X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1923; 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Thanks. > > On 8/4/2021 10:38 PM, kernel test robot wrote: >> >> >> Greeting, >> >> FYI, we noticed a -45.4% regression of stress-ng.mknod.ops_per_sec due to commit: >> >> >> commit: 2bf1ec0ff067ff8f692d261b29c713f3583f7e2a ("xfs: log forces imply data device cache flushes") >> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master We noticed the commit 2bf1ec0ff067ff8f692d261b29c713f3583f7e2a is actually a fix to the race introduced by commit eef983ffeae7a1cdde8c3338155ae2dd74b8621b. Then we did a test for stress-ng.mknod.ops_per_sec between commit: eef983ffeae7a1cdde8c3338155ae2dd74b8621b and its parent commit: 3468bb1ca6e8840789e13c7b9d8b0c556b4fbe79 We got: commit: 3468bb1ca6e8840789e13c7b9d8b0c556b4fbe79 eef983ffeae7a1cdde8c3338155ae2dd74b8621b 3468bb1ca6e88407 eef983ffeae7a1cdde8c3338155 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | 112:1 456% 117:1 dmesg.timestamp:last 103:1 553% 109:1 kmsg.timestamp:last 1:1 0% 1:1 pmeter.pmeter.fail 1:1 0% 1:1 stress-ng.mknod.pass %stddev %change %stddev \ | \ 47979 +80.6% 86655 stress-ng.mknod.ops 799.29 +80.6% 1443 stress-ng.mknod.ops_per_sec It's like commit eef983ffeae7a1cdde8c3338155ae2dd74b8621b bought 80% performance gain. But it introduced race issue. Commit 2bf1ec0ff067ff8f692d261b29c713f3583f7e2a fixed the race issue and lost about 50% performance gain. Suppose we still have 30% performance gain with race issue fixed. So it's still a good change. We will close this report. Regards Yin, Fengwei >> >> >> in testcase: stress-ng >> on test machine: 96 threads 2 sockets Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 512G memory >> with following parameters: >> >>     nr_threads: 10% >>     disk: 1HDD >>     testtime: 60s >>     fs: xfs >>     class: filesystem >>     test: mknod >>     cpufreq_governor: performance >>     ucode: 0x5003006 >> >> >> >> >> If you fix the issue, kindly add following tag >> Reported-by: kernel test robot >> >> >> 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 split-job --compatible job.yaml  # generate the yaml file for lkp run >>          bin/lkp run                    generated-yaml-file >> >> ========================================================================================= >> class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime/ucode: >>    filesystem/gcc-9/performance/1HDD/xfs/x86_64-rhel-8.3/10%/debian-10.4-x86_64-20200603.cgz/lkp-csl-2sp7/mknod/stress-ng/60s/0x5003006 >> >> commit: >>    45eddb4140 ("xfs: factor out forced iclog flushes") >>    2bf1ec0ff0 ("xfs: log forces imply data device cache flushes") >> >> 45eddb414047c366 2bf1ec0ff067ff8f692d261b29c >> ---------------- --------------------------- >>           %stddev     %change         %stddev >>               \          |                \ >>       87135           -45.4%      47612        stress-ng.mknod.ops >>        1451           -45.4%     793.24        stress-ng.mknod.ops_per_sec >>       23.00 ±  7%     -51.4%      11.17 ± 12%  stress-ng.time.percent_of_cpu_this_job_got >>       13.80 ±  7%     -50.7%       6.80 ±  8%  stress-ng.time.system_time >>      211458 ±  2%     -62.4%      79605 ± 14%  stress-ng.time.voluntary_context_switches >>        0.30 ±  2%      -0.1        0.18        mpstat.cpu.all.sys% >>       13993 ±  2%     -38.1%       8659        softirqs.BLOCK >>       27747            -2.3%      27103        proc-vmstat.nr_slab_reclaimable >>       76223 ±  3%     -57.3%      32548 ±  5%  proc-vmstat.pgpgout >>        1170 ±  3%     -57.3%     500.17 ±  5%  vmstat.io.bo >>       10752           -47.7%       5624 ±  6%  vmstat.system.cs >>       32820           -34.5%      21499        slabinfo.kmalloc-rcl-64.active_objs >>      512.67           -34.6%     335.50        slabinfo.kmalloc-rcl-64.active_slabs >>       32836           -34.5%      21508        slabinfo.kmalloc-rcl-64.num_objs >>      512.67           -34.6%     335.50        slabinfo.kmalloc-rcl-64.num_slabs >>       24913 ±  2%     -42.8%      14251        interrupts.315:PCI-MSI.376832-edge.ahci[0000:00:17.0] >>       71844 ±  6%     -19.9%      57564 ±  3%  interrupts.CAL:Function_call_interrupts >>      206.50 ± 37%     -42.9%     118.00 ± 41%  interrupts.CPU1.NMI:Non-maskable_interrupts >>      206.50 ± 37%     -42.9%     118.00 ± 41%  interrupts.CPU1.PMI:Performance_monitoring_interrupts >>      173.17 ± 26%     -31.7%     118.33 ± 38%  interrupts.CPU2.NMI:Non-maskable_interrupts >>      173.17 ± 26%     -31.7%     118.33 ± 38%  interrupts.CPU2.PMI:Performance_monitoring_interrupts >>      189.83 ± 34%     -40.6%     112.83 ± 25%  interrupts.CPU49.NMI:Non-maskable_interrupts >>      189.83 ± 34%     -40.6%     112.83 ± 25%  interrupts.CPU49.PMI:Performance_monitoring_interrupts >>      181.67 ± 25%     -38.3%     112.17 ± 24%  interrupts.CPU50.NMI:Non-maskable_interrupts >>      181.67 ± 25%     -38.3%     112.17 ± 24%  interrupts.CPU50.PMI:Performance_monitoring_interrupts >>        1895 ± 16%     -32.8%       1274 ± 20%  interrupts.RES:Rescheduling_interrupts >>   3.127e+08 ±  5%     -12.2%  2.746e+08 ±  3%  perf-stat.i.branch-instructions >>       10683           -49.8%       5364 ±  6%  perf-stat.i.context-switches >>   3.866e+08 ±  4%     -14.2%  3.318e+08 ±  3%  perf-stat.i.dTLB-loads >>   1.949e+08 ±  3%     -14.7%  1.662e+08 ±  3%  perf-stat.i.dTLB-stores >>   1.538e+09 ±  5%     -12.4%  1.348e+09 ±  3%  perf-stat.i.instructions >>        9.31 ±  4%     -13.6%       8.04 ±  3%  perf-stat.i.metric.M/sec >>      127426 ± 14%     -32.6%      85864 ±  9%  perf-stat.i.node-load-misses >>   3.078e+08 ±  5%     -12.2%  2.702e+08 ±  3%  perf-stat.ps.branch-instructions >>       10512           -49.8%       5279 ±  6%  perf-stat.ps.context-switches >>   3.805e+08 ±  4%     -14.2%  3.265e+08 ±  3%  perf-stat.ps.dTLB-loads >>   1.918e+08 ±  3%     -14.7%  1.635e+08 ±  3%  perf-stat.ps.dTLB-stores >>   1.514e+09 ±  5%     -12.4%  1.327e+09 ±  3%  perf-stat.ps.instructions >>      125399 ± 14%     -32.6%      84480 ±  9%  perf-stat.ps.node-load-misses >>   9.563e+10 ±  6%     -12.3%  8.383e+10 ±  3%  perf-stat.total.instructions >>        8.31 ± 20%      -3.9        4.45 ± 25%  perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe >>        8.30 ± 20%      -3.9        4.45 ± 25%  perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe >>        2.35 ± 19%      -1.6        0.75 ± 25%  perf-profile.calltrace.cycles-pp.__x64_sys_sync.do_syscall_64.entry_SYSCALL_64_after_hwframe >>        2.35 ± 19%      -1.6        0.75 ± 25%  perf-profile.calltrace.cycles-pp.ksys_sync.__x64_sys_sync.do_syscall_64.entry_SYSCALL_64_after_hwframe >>        2.08 ± 19%      -1.6        0.50 ± 72%  perf-profile.calltrace.cycles-pp.iterate_supers.ksys_sync.__x64_sys_sync.do_syscall_64.entry_SYSCALL_64_after_hwframe >>        1.85 ± 25%      -0.7        1.14 ± 31%  perf-profile.calltrace.cycles-pp.do_mknodat.do_syscall_64.entry_SYSCALL_64_after_hwframe >>        1.04 ± 27%      -0.7        0.36 ±106%  perf-profile.calltrace.cycles-pp.xfs_inactive_ifree.xfs_inactive.xfs_fs_destroy_inode.destroy_inode.do_unlinkat >>        1.08 ± 27%      -0.6        0.46 ± 77%  perf-profile.calltrace.cycles-pp.destroy_inode.do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe >>        1.05 ± 27%      -0.6        0.45 ± 77%  perf-profile.calltrace.cycles-pp.xfs_fs_destroy_inode.destroy_inode.do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe >>        1.04 ± 27%      -0.6        0.44 ± 78%  perf-profile.calltrace.cycles-pp.xfs_inactive.xfs_fs_destroy_inode.destroy_inode.do_unlinkat.do_syscall_64 >>        0.89 ± 17%      -0.3        0.58 ±  9%  perf-profile.calltrace.cycles-pp.worker_thread.kthread.ret_from_fork >>        1.21 ±  8%      +0.2        1.45 ±  7%  perf-profile.calltrace.cycles-pp.perf_mux_hrtimer_handler.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt >>        8.13 ±  9%      +2.0       10.16 ±  6%  perf-profile.calltrace.cycles-pp.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt >>        2.35 ± 19%      -1.6        0.75 ± 25%  perf-profile.children.cycles-pp.__x64_sys_sync >>        2.35 ± 19%      -1.6        0.75 ± 25%  perf-profile.children.cycles-pp.ksys_sync >>        2.09 ± 19%      -1.4        0.65 ± 25%  perf-profile.children.cycles-pp.iterate_supers >>        2.25 ± 18%      -1.1        1.14 ± 26%  perf-profile.children.cycles-pp._raw_spin_lock >>        1.40 ± 25%      -1.1        0.31 ± 54%  perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath >>        1.85 ± 25%      -0.7        1.14 ± 31%  perf-profile.children.cycles-pp.do_mknodat >>        1.08 ± 27%      -0.5        0.55 ± 43%  perf-profile.children.cycles-pp.destroy_inode >>        1.05 ± 27%      -0.5        0.54 ± 42%  perf-profile.children.cycles-pp.xfs_fs_destroy_inode >>        1.04 ± 27%      -0.5        0.54 ± 43%  perf-profile.children.cycles-pp.xfs_inactive >>        1.04 ± 27%      -0.5        0.53 ± 44%  perf-profile.children.cycles-pp.xfs_inactive_ifree >>        0.93 ± 21%      -0.5        0.44 ± 24%  perf-profile.children.cycles-pp.__schedule >>        0.49 ± 25%      -0.4        0.11 ± 76%  perf-profile.children.cycles-pp.pick_next_task_fair >>        1.05 ± 20%      -0.4        0.69 ± 13%  perf-profile.children.cycles-pp.find_busiest_group >>        0.66 ± 19%      -0.3        0.32 ± 30%  perf-profile.children.cycles-pp.schedule >>        1.00 ± 20%      -0.3        0.65 ± 13%  perf-profile.children.cycles-pp.update_sd_lb_stats >>        0.60 ± 20%      -0.3        0.29 ± 31%  perf-profile.children.cycles-pp.xfs_ifree >>        0.89 ± 17%      -0.3        0.58 ±  9%  perf-profile.children.cycles-pp.worker_thread >>        0.44 ± 26%      -0.3        0.16 ± 45%  perf-profile.children.cycles-pp.newidle_balance >>        0.49 ± 39%      -0.3        0.22 ± 35%  perf-profile.children.cycles-pp.xfs_fs_sync_fs >>        0.40 ± 49%      -0.2        0.17 ± 29%  perf-profile.children.cycles-pp.xfs_log_force >>        0.31 ± 29%      -0.2        0.11 ± 56%  perf-profile.children.cycles-pp.schedule_timeout >>        0.24 ± 60%      -0.2        0.06 ± 50%  perf-profile.children.cycles-pp.xfs_inobt_get_rec >>        0.38 ± 19%      -0.2        0.21 ± 30%  perf-profile.children.cycles-pp.xfs_btree_lookup >>        0.42 ± 14%      -0.2        0.26 ± 35%  perf-profile.children.cycles-pp.xfs_check_agi_freecount >>        0.30 ± 27%      -0.2        0.14 ± 37%  perf-profile.children.cycles-pp.xfs_btree_lookup_get_block >>        0.25 ± 30%      -0.1        0.10 ± 39%  perf-profile.children.cycles-pp.iterate_bdevs >>        0.33 ± 28%      -0.1        0.19 ± 20%  perf-profile.children.cycles-pp.try_to_wake_up >>        0.26 ± 31%      -0.1        0.13 ± 23%  perf-profile.children.cycles-pp.schedule_idle >>        0.16 ± 36%      -0.1        0.03 ±102%  perf-profile.children.cycles-pp.__down >>        0.16 ± 35%      -0.1        0.04 ± 73%  perf-profile.children.cycles-pp.xfs_buf_lock >>        0.16 ± 36%      -0.1        0.04 ± 73%  perf-profile.children.cycles-pp.down >>        0.21 ± 39%      -0.1        0.09 ± 52%  perf-profile.children.cycles-pp.xfs_iunlink_remove >>        0.19 ± 28%      -0.1        0.08 ± 43%  perf-profile.children.cycles-pp.xfs_buf_item_release >>        0.21 ± 33%      -0.1        0.10 ± 35%  perf-profile.children.cycles-pp.xfs_difree_inobt >>        0.14 ± 16%      -0.1        0.04 ±104%  perf-profile.children.cycles-pp._xfs_trans_bjoin >>        0.18 ± 30%      -0.1        0.08 ± 80%  perf-profile.children.cycles-pp.wait_for_completion >>        0.15 ± 27%      -0.1        0.06 ± 53%  perf-profile.children.cycles-pp.up >>        0.15 ± 33%      -0.1        0.06 ± 81%  perf-profile.children.cycles-pp.xfs_difree_finobt >>        0.15 ± 27%      -0.1        0.08 ± 19%  perf-profile.children.cycles-pp.xfs_trans_alloc >>        0.10 ± 29%      -0.1        0.04 ± 72%  perf-profile.children.cycles-pp.xfs_log_reserve >>        0.04 ± 77%      +0.1        0.10 ± 34%  perf-profile.children.cycles-pp.balance_fair >>        0.05 ± 79%      +0.1        0.15 ± 31%  perf-profile.children.cycles-pp.smpboot_thread_fn >>        0.58 ± 16%      +0.1        0.72 ± 11%  perf-profile.children.cycles-pp.update_rq_clock >>        1.24 ±  8%      +0.3        1.52 ±  4%  perf-profile.children.cycles-pp.perf_mux_hrtimer_handler >>        8.31 ±  9%      +2.1       10.40 ±  5%  perf-profile.children.cycles-pp.__hrtimer_run_queues >>        1.30 ± 18%      -1.0        0.30 ± 54%  perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath >>        0.75 ± 21%      -0.3        0.44 ± 20%  perf-profile.self.cycles-pp.__percpu_counter_sum >>        0.43 ± 25%      -0.3        0.16 ± 45%  perf-profile.self.cycles-pp.down_read >>        0.72 ± 13%      -0.2        0.47 ± 12%  perf-profile.self.cycles-pp.update_sd_lb_stats >>        0.35 ± 15%      +0.1        0.43 ± 13%  perf-profile.self.cycles-pp.irqtime_account_irq >>        0.08 ± 60%      +0.1        0.16 ± 18%  perf-profile.self.cycles-pp.timerqueue_del >> >> >>                                                                                                              stress-ng.time.system_time >>                                                                                     20 +----------------------------------------------------------------------+ >>       |            +                                                         | >>    18 |-+     +   ::                                       .+                | >>       |      : :  ::                   +..               .+  :               | >>    16 |-+    : : :  :                 :       +.    +   +    :     +         | >>       |:    +   ::  :                 :   +  :  +  : : :      :  .. +        | >>    14 |:+  +    +   :         .+.   .+     + :   + : : :      +.+    +.   .+.| >>       | +.+         :  +.+.+.+   +.+        +     +   +                +.+   | >>    12 |-+           :  :                                                     | >>       |              ::                                                      | >>    10 |-+            ::                                                      | >>       |              +                                                       | >>     8 |-+                    O   O   O      O   O       O O                  | >>       | O O     O    O     O   O       O      O   O O       O                | >>     6 +----------------------------------------------------------------------+ >>                                                                                                                                                                                                                                                                       stress-ng.time.percent_of_cpu_this_job_got >>                                                                                     35 +----------------------------------------------------------------------+ >>       |                                                                      | >>       |       +    +                                        +                | >>    30 |-+     ::  ::                                       +:                | >>       |      : :  ::                   +..    +     +   +.+  :     +         | >>       |:     :  ::  :                 :      : +   : : :     :   .. :        | >>    25 |:+  .+   +   :                 :   +. :  +. : : :      :.+   :        | >>       | +.+         :  +.+.+.+.+.+.+.+      +     +   +       +      +.+.+.+.| >>    20 |-+           :  :                                                     | >>       |             : :                                                      | >>       |              ::                                                      | >>    15 |-+            :                                                       | >>       |              +       O   O   O      O   O       O O                  | >>       | O O O O O  O O O O O   O   O   O  O   O   O O       O                | >>    10 +----------------------------------------------------------------------+ >>                                                                                                                                                                                                                                                                          stress-ng.time.voluntary_context_switches >>                                                                                     260000 +------------------------------------------------------------------+ >>    240000 |-+     +                                                          | >>           |      + :  +.                  +                 .+. .+.          | >>    220000 |++.+.+  : +  +.   .+.         + + +.+. .+.+   +.+   +   +. .+. .+.| >>    200000 |-+       +     +.+   +. .+. .+   +    +    + +            +   +   | >>           |                       +   +                +                     | >>    180000 |-+                                                                | >>    160000 |-+                                                                | >>    140000 |-+                                                                | >>           |                                                                  | >>    120000 |-+           O                                                    | >>    100000 |-O   O         O O                          O                     | >>           |       O   O                   O    O   O       O   O             | >>     80000 |-+ O               O O O   O O   OO   O   O   O   O               | >>     60000 +------------------------------------------------------------------+ >>                                                                                                                                                                                                                                                                                     stress-ng.mknod.ops >>                                                                                     95000 +-------------------------------------------------------------------+ >>    90000 |-+    .+. .+.                                     .+. .+.          | >>          |.+.+.+   +   +.+.+.+.+.+.+.+.+.+.+.+.+.+.+.+.+.+.+   +   +. .+.+.+.| >>    85000 |-+                                                         +       | >>    80000 |-+                                                                 | >>          |                                                                   | >>    75000 |-+                                                                 | >>    70000 |-+                                                                 | >>    65000 |-+                                                                 | >>          |                                                                   | >>    60000 |-+                                                                 | >>    55000 |-+                                                                 | >>          |                                                                   | >>    50000 |-O O O O O O O O O O O O O O O O O O O O O O O O O   O O           | >>    45000 +-------------------------------------------------------------------+ >>                                                                                                                                                                                                                                                                                stress-ng.mknod.ops_per_sec >>                                                                                     1600 +--------------------------------------------------------------------+ >>         |      .+.                                          .+. .+           | >>    1500 |.+.+.+   +.+.+.+.+.+. .+.+.+.+.+..+.+.+.+.+.+.+.+.+   +  +   .+.+.+.| >>    1400 |-+                   +                                    +.+       | >>         |                                                                    | >>    1300 |-+                                                                  | >>    1200 |-+                                                                  | >>         |                                                                    | >>    1100 |-+                                                                  | >>    1000 |-+                                                                  | >>         |                                                                    | >>     900 |-+                                                                  | >>     800 |-+   O O   O O O     O O       O      O O     O O O     O           | >>         | O O     O       O O     O O O    O O     O O       O O             | >>     700 +--------------------------------------------------------------------+ >>                                                                                                                                                                   [*] bisect-good sample >> [O] bisect-bad  sample >> >> >> >> 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. >> >> >> --- >> 0DAY/LKP+ Test Infrastructure                   Open Source Technology Center >> https://lists.01.org/hyperkitty/list/lkp@lists.01.org       Intel Corporation >> >> Thanks, >> Oliver Sang >> >