FYI, we noticed the below changes on git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master commit cd73ca21cd2bb3711b8d80ba74c90d37ef15fe4d ("rcu: Force wakeup of rcu_gp_kthread at grace-period end")
testcase/path_params/tbox_group: aim7/performance-100-fork_test/lkp-a03 3382adbc1bb8c80e cd73ca21cd2bb3711b8d80ba74 ---------------- -------------------------- %stddev %change %stddev \ | \ 205760 ± 2% +47.6% 303763 ± 1% aim7.time.involuntary_context_switches 215 ± 1% +24.7% 268 ± 22% sched_debug.cfs_rq[2]:/.load 205760 ± 2% +47.6% 303763 ± 1% time.involuntary_context_switches 366314 ± 1% +32.8% 486545 ± 3% softirqs.RCU 1493 ± 2% +17.1% 1749 ± 2% slabinfo.kmalloc-128.num_objs 1374 ± 1% +20.5% 1656 ± 2% slabinfo.kmalloc-128.active_objs 4511 ± 0% +7.5% 4850 ± 0% vmstat.system.in 7806 ± 0% +5.9% 8264 ± 1% vmstat.system.cs 335 ± 13% +30.2% 436 ± 12% latency_stats.avg.call_rwsem_down_write_failed.copy_process.do_fork.SyS_clone.system_call_fastpath 1266 ± 1% +18.6% 1501 ± 0% latency_stats.avg.do_wait.SyS_wait4.system_call_fastpath 188 ± 18% +27.9% 241 ± 19% latency_stats.avg.sync_inodes_sb.sync_inodes_one_sb.iterate_supers.sys_sync.system_call_fastpath 955 ± 9% -29.6% 672 ± 17% latency_stats.avg.call_rwsem_down_write_failed.anon_vma_clone.anon_vma_fork.copy_process.do_fork.SyS_clone.system_call_fastpath 211 ± 3% -11.1% 188 ± 4% latency_stats.avg.pipe_wait.pipe_read.__vfs_read.vfs_read.SyS_read.system_call_fastpath 1109 ± 8% -24.0% 842 ± 18% latency_stats.avg.call_rwsem_down_write_failed.anon_vma_fork.copy_process.do_fork.SyS_clone.system_call_fastpath 3 ± 0% -33.3% 2 ± 0% latency_stats.hits.rpc_wait_bit_killable.__rpc_execute.rpc_execute.rpc_run_task.nfs4_call_sync_sequence.[nfsv4]._nfs4_proc_getattr.[nfsv4].nfs4_proc_getattr.[nfsv4].__nfs_revalidate_inode.nfs_getattr.vfs_getattr_nosec.vfs_getattr.vfs_fstat 3 ± 0% -33.3% 2 ± 0% latency_stats.hits.wait_on_page_bit.filemap_fdatawait_range.filemap_fdatawait.filemap_write_and_wait.nfs_wb_all.nfs_getattr.vfs_getattr_nosec.vfs_getattr.vfs_fstat.SYSC_newfstat.SyS_newfstat.system_call_fastpath 1853 ± 1% +8.4% 2009 ± 2% latency_stats.hits.do_wait.SyS_wait4.system_call_fastpath 59 ± 11% +14.6% 68 ± 2% latency_stats.hits.call_rwsem_down_write_failed.cgroup_post_fork.copy_process.do_fork.SyS_clone.system_call_fastpath 28538 ± 10% -18.5% 23253 ± 5% latency_stats.max.call_rwsem_down_write_failed.anon_vma_clone.anon_vma_fork.copy_process.do_fork.SyS_clone.system_call_fastpath 32316 ± 17% -17.6% 26627 ± 6% latency_stats.max.call_rwsem_down_write_failed.anon_vma_fork.copy_process.do_fork.SyS_clone.system_call_fastpath 2347345 ± 2% +28.6% 3019561 ± 3% latency_stats.sum.do_wait.SyS_wait4.system_call_fastpath 3596 ± 10% +20.5% 4333 ± 6% latency_stats.sum.wait_on_page_bit_killable.__lock_page_or_retry.filemap_fault.__do_fault.handle_pte_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault 1335990 ± 12% +49.7% 2000350 ± 12% latency_stats.sum.call_rwsem_down_write_failed.copy_process.do_fork.SyS_clone.system_call_fastpath 13375861 ± 15% -29.6% 9420979 ± 27% latency_stats.sum.call_rwsem_down_write_failed.anon_vma_clone.anon_vma_fork.copy_process.do_fork.SyS_clone.system_call_fastpath 1291678 ± 4% -10.6% 1155232 ± 3% latency_stats.sum.pipe_wait.pipe_read.__vfs_read.vfs_read.SyS_read.system_call_fastpath 567 ± 18% +27.8% 725 ± 19% latency_stats.sum.sync_inodes_sb.sync_inodes_one_sb.iterate_supers.sys_sync.system_call_fastpath 1343 ± 5% -29.4% 948 ± 5% latency_stats.sum.wait_on_page_bit.filemap_fdatawait_range.filemap_fdatawait.filemap_write_and_wait.nfs_wb_all.nfs_getattr.vfs_getattr_nosec.vfs_getattr.vfs_fstat.SYSC_newfstat.SyS_newfstat.system_call_fastpath lkp-a03: Atom Memory: 8G softirqs.RCU 520000 ++-----------------------------------------------------------------+ | O | 500000 O+ O O O O O O | 480000 ++ O O O O O O O O O O O | | O O O O | 460000 ++ | 440000 ++ | | | 420000 ++ | 400000 ++ | | *.. | 380000 ++ .. *.. .*.. | 360000 ++ .*.. .*.. .*..*..*.*..*.* *.*..*.*.. .. * *.*.. .*..* *..* * * *.* * | 340000 ++-----------------------------------------------------------------+ aim7.time.involuntary_context_switches 320000 ++-----------------------------------------------------------------+ | O O O O O O O O O | 300000 O+ O O O O O O O O O O | | O O | 280000 ++ O | | | 260000 ++ | | | 240000 ++ | | | 220000 ++ | | .*.*.. .*..*..*. .*.*..*.. .*.. .*..*. .*..*.*.. .*..*. | 200000 *+ *.*..* *. * * *. * *..* | | 180000 ++-----------------------------------------------------------------+ time.involuntary_context_switches 320000 ++-----------------------------------------------------------------+ | O O O O O O O O O | 300000 O+ O O O O O O O O O O | | O O | 280000 ++ O | | | 260000 ++ | | | 240000 ++ | | | 220000 ++ | | .*.*.. .*..*..*. .*.*..*.. .*.. .*..*. .*..*.*.. .*..*. | 200000 *+ *.*..* *. * * *. * *..* | | 180000 ++-----------------------------------------------------------------+ vmstat.system.in 4900 ++---------------------------O---------------------------------------+ O O O O O O O O O O O O O | 4850 ++ O O O O O O O O O | 4800 ++ | | | 4750 ++ | 4700 ++ | | | 4650 ++ | 4600 ++ | | | 4550 ++ .*..*.. .*.. | 4500 *+.*. .*. .*..*.*.. .*.*..*..*.*..*.*..*..* *.*. *. .* | *..*. *. *. *. | 4450 ++-------------------------------------------------------------------+ [*] bisect-good sample [O] bisect-bad sample To reproduce: apt-get install ruby git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/setup-local job.yaml # the job file attached in this email bin/run-local 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 ------------------------------------- l...@eclists.intel.com https://eclists.intel.com/sympa/info/lkp Unsubscribe by sending email to sy...@eclists.intel.com with subject "Unsubscribe lkp"
--- LKP_SERVER: inn LKP_CGI_PORT: 80 testcase: aim7 default-monitors: wait: pre-test 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 default-watchdogs: watch-oom: watchdog: cpufreq_governor: performance commit: 54896f27dd5c7e83c37c85eb1093f14543af2bfa model: Atom memory: 8G ssd_partitions: "/dev/disk/by-id/ata-INTEL_SSDSC2CW240A3_CVCV24050155240CGN-part1" swap_partitions: aim7: load: 100 test: fork_test testbox: lkp-a03 tbox_group: lkp-a03 kconfig: x86_64-rhel enqueue_time: 2015-06-10 10:56:36.930460647 +08:00 user: lkp queue: cyclic compiler: gcc-4.9 head_commit: 54896f27dd5c7e83c37c85eb1093f14543af2bfa base_commit: d4a4f75cd8f29cd9464a5a32e9224a91571d6649 branch: next/master kernel: "/pkg/linux/x86_64-rhel/gcc-4.9/54896f27dd5c7e83c37c85eb1093f14543af2bfa/vmlinuz-4.1.0-rc7-next-20150610" rootfs: debian-x86_64-2015-02-07.cgz result_root: "/result/aim7/performance-100-fork_test/lkp-a03/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/54896f27dd5c7e83c37c85eb1093f14543af2bfa/0" job_file: "/lkp/scheduled/lkp-a03/cyclic_aim7-performance-100-fork_test-x86_64-rhel-CYCLIC_HEAD-54896f27dd5c7e83c37c85eb1093f14543af2bfa-0-20150610-8556-14ms8jq.yaml" dequeue_time: 2015-06-11 06:19:56.066407390 +08:00 nr_cpu: "$(nproc)" max_uptime: 1495.8999999999999 initrd: "/osimage/debian/debian-x86_64-2015-02-07.cgz" bootloader_append: - root=/dev/ram0 - user=lkp - job=/lkp/scheduled/lkp-a03/cyclic_aim7-performance-100-fork_test-x86_64-rhel-CYCLIC_HEAD-54896f27dd5c7e83c37c85eb1093f14543af2bfa-0-20150610-8556-14ms8jq.yaml - ARCH=x86_64 - kconfig=x86_64-rhel - branch=next/master - commit=54896f27dd5c7e83c37c85eb1093f14543af2bfa - BOOT_IMAGE=/pkg/linux/x86_64-rhel/gcc-4.9/54896f27dd5c7e83c37c85eb1093f14543af2bfa/vmlinuz-4.1.0-rc7-next-20150610 - max_uptime=1495 - RESULT_ROOT=/result/aim7/performance-100-fork_test/lkp-a03/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/54896f27dd5c7e83c37c85eb1093f14543af2bfa/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-4.9/54896f27dd5c7e83c37c85eb1093f14543af2bfa/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/aim7-x86_64.cgz" job_state: finished loadavg: 76.17 66.16 31.35 1/109 3251 start_time: '1433974860' end_time: '1433975225' version: "/lkp/lkp/.src-20150611-021242"
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor