"Paul E. McKenney" <paul...@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. > Or am I missing the plot somewhere here? Which plot? 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 > l...@lists.01.org > https://lists.01.org/mailman/listinfo/lkp -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
