Messages in this thread | | | Date | Wed, 6 Jan 2016 08:00:35 -0800 | From | "Paul E. McKenney" <> | Subject | Re: [LKP] [lkp] [rcu] b8084f70e0: No primary result change, 1414.7% unixbench.time.involuntary_context_switches |
| |
On Wed, Jan 06, 2016 at 12:25:55PM +0800, Huang, Ying wrote: > "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> writes: > > > On Wed, Jan 06, 2016 at 10:47:43AM +0800, kernel test robot wrote: > >> FYI, we noticed the below changes on > >> > >> https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git for-kbuild-bot/current-stable > >> commit b8084f70e028697b342d6388b244d6171717fc54 ("rcu: Eliminate softirq processing from rcutree") > > > > This is a performance degradation, correct? If so, looks like this commit > > is not ready for mainline unless set up to be configured on only for > > -rt workloads. > > Yes. This is a performance degradation.
Thank you!
> > Or am I missing the plot somewhere here? > > Which plot?
Apologies, that was American slang, not so appropriate for this audience. I am asking the -rt guys if there is some problem with adjusting the patch so that it eliminates softirq only when the kernel is specifically build/booted for -rt.
Thanx, Paul
> Best Regards, > Huang, Ying > > > Thanx, Paul > > > >> ========================================================================================= > >> compiler/cpufreq_governor/kconfig/nr_task/rootfs/tbox_group/test/testcase: > >> gcc-4.9/performance/x86_64-rhel/1/debian-x86_64-2015-02-07.cgz/lkp-ivb-d02/fsbuffer/unixbench > >> > >> commit: > >> ee644236a506642e20637f954d286f49a76ed83a > >> b8084f70e028697b342d6388b244d6171717fc54 > >> > >> ee644236a506642e b8084f70e028697b342d6388b2 > >> ---------------- -------------------------- > >> %stddev %change %stddev > >> \ | \ > >> 257.25 18% +1414.7% 3896 13% unixbench.time.involuntary_context_switches > >> 4425148 22% -61.9% 1684712 29% cpuidle.C1E-IVB.time > >> 83.75 48% +91.6% 160.50 31% cpuidle.POLL.usage > >> 1902 7% -12.0% 1674 1% slabinfo.anon_vma.active_objs > >> 1902 7% -12.0% 1674 1% slabinfo.anon_vma.num_objs > >> 257.25 18% +1414.7% 3896 13% time.involuntary_context_switches > >> 8.15 6% -14.1% 7.00 1% time.user_time > >> 34345 14% -33.3% 22908 33% sched_debug.cfs_rq:/.exec_clock.2 > >> 34987 13% -19.7% 28093 15% sched_debug.cfs_rq:/.exec_clock.max > >> 642.75 5% +59.6% 1025 55% sched_debug.cfs_rq:/.exec_clock.min > >> 14639 13% -21.8% 11443 16% sched_debug.cfs_rq:/.exec_clock.stddev > >> 127.75 16% -26.2% 94.25 25% sched_debug.cfs_rq:/.load_avg.3 > >> 38865 12% -36.0% 24885 34% sched_debug.cfs_rq:/.min_vruntime.2 > >> 39385 12% -22.8% 30395 16% sched_debug.cfs_rq:/.min_vruntime.max > >> 1090 11% +45.3% 1584 32% sched_debug.cfs_rq:/.min_vruntime.min > >> 16286 13% -25.1% 12200 18% sched_debug.cfs_rq:/.min_vruntime.stddev > >> 2.00 0% -50.0% 1.00 0% sched_debug.cfs_rq:/.nr_spread_over.0 > >> 2.00 0% -50.0% 1.00 0% sched_debug.cfs_rq:/.nr_spread_over.max > >> 0.87 0% -42.3% 0.50 0% sched_debug.cfs_rq:/.nr_spread_over.stddev > >> 28.50 62% +338.6% 125.00 114% sched_debug.cfs_rq:/.runnable_load_avg.1 > >> 16286 13% -25.1% 12200 18% sched_debug.cfs_rq:/.spread0.stddev > >> 127.75 16% -26.0% 94.50 25% sched_debug.cfs_rq:/.tg_load_avg_contrib.3 > >> 626662 5% -13.2% 544121 9% sched_debug.cpu.avg_idle.0 > >> 20.25 28% +419.8% 105.25 132% sched_debug.cpu.cpu_load[3].1 > >> 692.40 7% -15.2% 586.96 9% sched_debug.cpu.curr->pid.avg > >> 36187 12% -31.5% 24793 29% sched_debug.cpu.nr_load_updates.2 > >> 15625 11% +61.6% 25245 23% sched_debug.cpu.nr_switches.0 > >> 20008 4% +14.1% 22828 4% sched_debug.cpu.nr_switches.avg > >> 23333 8% +40.9% 32872 18% sched_debug.cpu.sched_count.0 > >> 21974 4% +12.7% 24771 4% sched_debug.cpu.sched_count.avg > >> 31771 9% +22.6% 38942 5% sched_debug.cpu.sched_count.max > >> 9514 28% +75.8% 16728 7% sched_debug.cpu.ttwu_count.0 > >> 4323 10% +40.6% 6080 30% sched_debug.cpu.ttwu_count.2 > >> 10068 4% +15.6% 11639 4% sched_debug.cpu.ttwu_count.avg > >> 4101 10% +21.7% 4990 8% sched_debug.cpu.ttwu_count.min > >> 3676 21% +102.5% 7443 8% sched_debug.cpu.ttwu_local.0 > >> 2014 15% +43.2% 2884 10% sched_debug.cpu.ttwu_local.2 > >> 3508 1% +24.8% 4377 4% sched_debug.cpu.ttwu_local.avg > >> 5554 19% +34.0% 7444 8% sched_debug.cpu.ttwu_local.max > >> 1846 16% +40.2% 2588 6% sched_debug.cpu.ttwu_local.min > >> > >> ========================================================================================= > >> compiler/cpufreq_governor/kconfig/nr_task/rootfs/tbox_group/test/testcase: > >> gcc-4.9/performance/x86_64-rhel/1/debian-x86_64-2015-02-07.cgz/lkp-ivb-d02/fsdisk/unixbench > >> > >> commit: > >> ee644236a506642e20637f954d286f49a76ed83a > >> b8084f70e028697b342d6388b244d6171717fc54 > >> > >> ee644236a506642e b8084f70e028697b342d6388b2 > >> ---------------- -------------------------- > >> fail:runs %reproduction fail:runs > >> | | | > >> :4 25% 1:4 kmsg.DHCP/BOOTP:Reply_not_for_us,op[#]xid[#] > >> %stddev %change %stddev > >> \ | \ > >> 265.75 18% +1313.4% 3756 9% unixbench.time.involuntary_context_switches > >> 659.50 6% +16.5% 768.00 7% slabinfo.kmalloc-512.num_objs > >> 265.75 18% +1313.4% 3756 9% time.involuntary_context_switches > >> 5911312 13% -55.9% 2606719 10% cpuidle.C1E-IVB.time > >> 95195 172% +815.7% 871684 140% cpuidle.POLL.time > >> 51.75 10% -30.9% 35.75 24% cpuidle.POLL.usage > >> 13361 22% -27.0% 9754 4% sched_debug.cfs_rq:/.exec_clock.stddev > >> 14632 24% -28.1% 10524 5% sched_debug.cfs_rq:/.min_vruntime.stddev > >> 14632 24% -28.1% 10524 5% sched_debug.cfs_rq:/.spread0.stddev > >> 197.25 14% +52.9% 301.50 41% sched_debug.cfs_rq:/.util_avg.0 > >> 552666 8% -7.7% 510200 7% sched_debug.cpu.avg_idle.1 > >> 13610 30% +59.7% 21734 7% sched_debug.cpu.nr_switches.0 > >> 21145 1% +12.3% 23752 7% sched_debug.cpu.nr_switches.avg > >> 10105 21% +62.1% 16380 7% sched_debug.cpu.nr_switches.min > >> 11293 28% -44.4% 6276 16% sched_debug.cpu.nr_switches.stddev > >> 21314 19% +38.1% 29437 5% sched_debug.cpu.sched_count.0 > >> 11261 22% +57.2% 17703 9% sched_debug.cpu.sched_count.min > >> 11158 27% -36.7% 7068 12% sched_debug.cpu.sched_count.stddev > >> 5854 35% +57.0% 9194 8% sched_debug.cpu.sched_goidle.0 > >> 3713 27% +68.4% 6253 11% sched_debug.cpu.sched_goidle.min > >> 5638 29% -44.5% 3131 18% sched_debug.cpu.sched_goidle.stddev > >> 8286 32% +85.0% 15333 15% sched_debug.cpu.ttwu_count.0 > >> 10697 1% +13.2% 12107 7% sched_debug.cpu.ttwu_count.avg > >> 4845 5% +17.8% 5707 8% sched_debug.cpu.ttwu_count.min > >> 2886 47% +105.5% 5931 16% sched_debug.cpu.ttwu_local.0 > >> 3667 3% +17.0% 4291 1% sched_debug.cpu.ttwu_local.avg > >> 2127 17% +29.2% 2748 7% sched_debug.cpu.ttwu_local.min > >> > >> > >> lkp-ivb-d02: Ivy Bridge > >> Memory: 8G > >> > >> unixbench.time.involuntary_context_switches > >> > >> 5000 ++-------------------------------------------------------------------+ > >> 4500 O+ | > >> | O O O O O > >> 4000 ++ O O O | > >> 3500 ++O O O O O O O O O O O | > >> | O O O | > >> 3000 ++ O O | > >> 2500 ++ | > >> 2000 ++ | > >> | | > >> 1500 ++ | > >> 1000 ++ | > >> |.*.. .*.. .*. .*.*.. .*.. | > >> 500 *+ * *.*..*.*. *. .*.. .*.*..* *.*..*.* | > >> 0 ++----------O---------O-------*----*------O----O---------------------+ > >> > >> [*] bisect-good sample > >> [O] bisect-bad sample > >> > >> To reproduce: > >> > >> git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git > >> cd lkp-tests > >> bin/lkp install job.yaml # job file is attached in this email > >> bin/lkp run job.yaml > >> > >> > >> 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, > >> Ying Huang > > > >> --- > >> LKP_SERVER: inn > >> LKP_CGI_PORT: 80 > >> LKP_CIFS_PORT: 139 > >> testcase: unixbench > >> default-monitors: > >> wait: activate-monitor > >> kmsg: > >> uptime: > >> iostat: > >> vmstat: > >> numa-numastat: > >> numa-vmstat: > >> numa-meminfo: > >> proc-vmstat: > >> proc-stat: > >> interval: 10 > >> meminfo: > >> slabinfo: > >> interrupts: > >> lock_stat: > >> latency_stats: > >> softirqs: > >> bdi_dev_mapping: > >> diskstats: > >> nfsstat: > >> cpuidle: > >> cpufreq-stats: > >> turbostat: > >> pmeter: > >> sched_debug: > >> interval: 60 > >> cpufreq_governor: performance > >> default-watchdogs: > >> oom-killer: > >> watchdog: > >> commit: b8084f70e028697b342d6388b244d6171717fc54 > >> model: Ivy Bridge > >> nr_cpu: 4 > >> memory: 8G > >> nr_hdd_partitions: 1 > >> hdd_partitions: "/dev/disk/by-id/ata-ST1000DM003-1CH162_Z1DBQSB0-part1" > >> swap_partitions: "/dev/disk/by-id/ata-ST1000DM003-1CH162_Z1DBQSB0-part3" > >> rootfs_partition: "/dev/disk/by-id/ata-ST1000DM003-1CH162_Z1DBQSB0-part4" > >> netconsole_port: 66723 > >> category: benchmark > >> nr_task: 1 > >> unixbench: > >> test: fsdisk > >> queue: bisect > >> testbox: lkp-ivb-d02 > >> tbox_group: lkp-ivb-d02 > >> kconfig: x86_64-rhel > >> enqueue_time: 2016-01-05 16:24:11.468660360 +08:00 > >> id: 62c43434378ef50b95fcd4973759daf66a148734 > >> user: lkp > >> compiler: gcc-4.9 > >> head_commit: 5bae791e5bb8895ac3d65634231c99d79a0e0002 > >> base_commit: 168309855a7d1e16db751e9c647119fe2d2dc878 > >> branch: linux-devel/devel-hourly-2016010502 > >> rootfs: debian-x86_64-2015-02-07.cgz > >> result_root: "/result/unixbench/performance-1-fsdisk/lkp-ivb-d02/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/b8084f70e028697b342d6388b244d6171717fc54/0" > >> job_file: "/lkp/scheduled/lkp-ivb-d02/bisect_unixbench-performance-1-fsdisk-debian-x86_64-2015-02-07.cgz-x86_64-rhel-b8084f70e028697b342d6388b244d6171717fc54-20160105-89027-193oala-0.yaml" > >> max_uptime: 922.0999999999999 > >> initrd: "/osimage/debian/debian-x86_64-2015-02-07.cgz" > >> bootloader_append: > >> - root=/dev/ram0 > >> - user=lkp > >> - job=/lkp/scheduled/lkp-ivb-d02/bisect_unixbench-performance-1-fsdisk-debian-x86_64-2015-02-07.cgz-x86_64-rhel-b8084f70e028697b342d6388b244d6171717fc54-20160105-89027-193oala-0.yaml > >> - ARCH=x86_64 > >> - kconfig=x86_64-rhel > >> - branch=linux-devel/devel-hourly-2016010502 > >> - commit=b8084f70e028697b342d6388b244d6171717fc54 > >> - BOOT_IMAGE=/pkg/linux/x86_64-rhel/gcc-4.9/b8084f70e028697b342d6388b244d6171717fc54/vmlinuz-4.4.0-rc6-00236-gb8084f7 > >> - max_uptime=922 > >> - RESULT_ROOT=/result/unixbench/performance-1-fsdisk/lkp-ivb-d02/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/b8084f70e028697b342d6388b244d6171717fc54/0 > >> - LKP_SERVER=inn > >> - |2- > >> > >> > >> earlyprintk=ttyS0,115200 systemd.log_level=err > >> debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 > >> panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 > >> console=ttyS0,115200 console=tty0 vga=normal > >> > >> rw > >> lkp_initrd: "/lkp/lkp/lkp-x86_64.cgz" > >> modules_initrd: "/pkg/linux/x86_64-rhel/gcc-4.9/b8084f70e028697b342d6388b244d6171717fc54/modules.cgz" > >> bm_initrd: "/osimage/deps/debian-x86_64-2015-02-07.cgz/lkp.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/run-ipconfig.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/turbostat.cgz,/lkp/benchmarks/turbostat.cgz,/lkp/benchmarks/unixbench.cgz" > >> linux_headers_initrd: "/pkg/linux/x86_64-rhel/gcc-4.9/b8084f70e028697b342d6388b244d6171717fc54/linux-headers.cgz" > >> repeat_to: 2 > >> kernel: "/pkg/linux/x86_64-rhel/gcc-4.9/b8084f70e028697b342d6388b244d6171717fc54/vmlinuz-4.4.0-rc6-00236-gb8084f7" > >> dequeue_time: 2016-01-05 16:39:47.706440461 +08:00 > >> job_state: finished > >> loadavg: 0.58 0.25 0.10 1/123 2689 > >> start_time: '1451983209' > >> end_time: '1451983353' > >> version: "/lkp/lkp/.src-20160105-162125" > > > > > > _______________________________________________ > > LKP mailing list > > LKP@lists.01.org > > https://lists.01.org/mailman/listinfo/lkp >
| |