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Date: Sun, 30 Sep 2018 14:51:00 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Amir Goldstein <amir73il@...il.com>
Cc: Jan Kara <jack@...e.cz>, LKML <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [LKP] [fsnotify] 60f7ed8c7c: will-it-scale.per_thread_ops -5.9%
regression
Greeting,
FYI, we noticed a -5.9% regression of will-it-scale.per_thread_ops due to commit:
commit: 60f7ed8c7c4d06aeda448c6da74621552ee739aa ("fsnotify: send path type events to group with super block marks")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: will-it-scale
on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 64G memory
with following parameters:
nr_task: 16
mode: thread
test: unlink2
cpufreq_governor: performance
test-description: Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two.
test-url: https://github.com/antonblanchard/will-it-scale
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/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
gcc-7/performance/x86_64-rhel-7.2/thread/16/debian-x86_64-2018-04-03.cgz/lkp-bdw-ep3d/unlink2/will-it-scale
commit:
1e6cb72399 ("fsnotify: add super block object type")
60f7ed8c7c ("fsnotify: send path type events to group with super block marks")
1e6cb72399fd58b3 60f7ed8c7c4d06aeda448c6da7
---------------- --------------------------
%stddev %change %stddev
\ | \
54483 -5.9% 51256 will-it-scale.per_thread_ops
46266 ± 2% -4.3% 44270 ± 2% will-it-scale.time.involuntary_context_switches
103.21 -7.8% 95.17 will-it-scale.time.user_time
871749 -5.9% 820115 will-it-scale.workload
10888 +22.2% 13303 ± 17% numa-meminfo.node0.Mapped
2001 ± 12% -16.8% 1665 ± 16% numa-meminfo.node0.PageTables
865.75 ± 32% +42.7% 1235 ± 22% slabinfo.dmaengine-unmap-16.active_objs
865.75 ± 32% +42.7% 1235 ± 22% slabinfo.dmaengine-unmap-16.num_objs
10974 ± 34% +60.2% 17584 ± 13% numa-vmstat.node0
2826 ± 3% +24.6% 3523 ± 16% numa-vmstat.node0.nr_mapped
500.00 ± 12% -16.9% 415.75 ± 16% numa-vmstat.node0.nr_page_table_pages
20375718 -6.3% 19092155 proc-vmstat.numa_hit
20370933 -6.3% 19087362 proc-vmstat.numa_local
69383484 -6.3% 65029677 proc-vmstat.pgalloc_normal
69362606 -6.3% 65008530 proc-vmstat.pgfree
8.39 ±109% +7.9e+05% 66298 ±140% sched_debug.cfs_rq:/.MIN_vruntime.avg
201.35 ±109% +2.2e+05% 436949 ± 61% sched_debug.cfs_rq:/.MIN_vruntime.max
40.24 ±109% +3.4e+05% 135845 ± 97% sched_debug.cfs_rq:/.MIN_vruntime.stddev
8.39 ±109% +7.9e+05% 66298 ±140% sched_debug.cfs_rq:/.max_vruntime.avg
201.35 ±109% +2.2e+05% 436949 ± 61% sched_debug.cfs_rq:/.max_vruntime.max
40.24 ±109% +3.4e+05% 135845 ± 97% sched_debug.cfs_rq:/.max_vruntime.stddev
43805 ± 6% +35.5% 59365 ± 31% sched_debug.cpu.load.avg
108694 ± 62% +154.7% 276883 ± 25% sched_debug.cpu.load.max
33945 ± 37% +119.6% 74560 ± 42% sched_debug.cpu.load.stddev
34287 ± 3% +10.1% 37761 ± 4% sched_debug.cpu.nr_switches.max
15993 ± 2% +10.8% 17727 ± 4% sched_debug.cpu.sched_goidle.max
1.36 ± 2% -0.1 1.24 perf-stat.branch-miss-rate%
1.546e+10 ± 2% -10.3% 1.387e+10 perf-stat.branch-misses
3.025e+08 ± 8% -17.7% 2.489e+08 ± 14% perf-stat.dTLB-load-misses
1.603e+12 ± 2% -2.6% 1.561e+12 perf-stat.dTLB-loads
0.01 ± 7% -0.0 0.01 ± 6% perf-stat.dTLB-store-miss-rate%
1.02e+08 ± 5% -34.7% 66552058 ± 6% perf-stat.dTLB-store-misses
9.269e+11 -5.8% 8.729e+11 perf-stat.dTLB-stores
4.885e+08 ± 33% -25.3% 3.649e+08 ± 9% perf-stat.iTLB-load-misses
6.92e+08 ± 5% -9.7% 6.251e+08 ± 2% perf-stat.node-loads
3.66e+09 ± 2% -8.5% 3.347e+09 ± 2% perf-stat.node-store-misses
2.464e+09 ± 3% -11.4% 2.184e+09 ± 2% perf-stat.node-stores
6419017 +3.9% 6671008 perf-stat.path-length
11.13 ± 16% -7.2 3.93 ± 6% perf-profile.calltrace.cycles-pp.d_instantiate.shmem_mknod.path_openat.do_filp_open.do_sys_open
11.80 ± 14% -7.0 4.76 ± 4% perf-profile.calltrace.cycles-pp.__destroy_inode.destroy_inode.do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe
11.96 ± 14% -7.0 4.94 ± 5% perf-profile.calltrace.cycles-pp.destroy_inode.do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe
10.89 ± 15% -7.0 3.88 ± 4% perf-profile.calltrace.cycles-pp.security_inode_free.__destroy_inode.destroy_inode.do_unlinkat.do_syscall_64
10.03 ± 17% -6.7 3.33 ± 7% perf-profile.calltrace.cycles-pp.inode_doinit_with_dentry.security_d_instantiate.d_instantiate.shmem_mknod.path_openat
10.07 ± 16% -6.7 3.37 ± 6% perf-profile.calltrace.cycles-pp.security_d_instantiate.d_instantiate.shmem_mknod.path_openat.do_filp_open
9.91 ± 16% -6.7 3.23 ± 5% perf-profile.calltrace.cycles-pp.selinux_inode_free_security.security_inode_free.__destroy_inode.destroy_inode.do_unlinkat
9.17 ± 17% -6.5 2.66 ± 6% perf-profile.calltrace.cycles-pp._raw_spin_lock.selinux_inode_free_security.security_inode_free.__destroy_inode.destroy_inode
9.24 ± 18% -6.4 2.81 ± 8% perf-profile.calltrace.cycles-pp._raw_spin_lock.inode_doinit_with_dentry.security_d_instantiate.d_instantiate.shmem_mknod
8.56 ± 19% -6.3 2.31 ± 10% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.inode_doinit_with_dentry.security_d_instantiate.d_instantiate
8.57 ± 18% -6.2 2.33 ± 7% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.selinux_inode_free_security.security_inode_free.__destroy_inode
1.89 ± 16% -0.6 1.28 ± 14% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.shmem_reserve_inode.shmem_get_inode.shmem_mknod
3.08 ± 11% -0.6 2.48 ± 10% perf-profile.calltrace.cycles-pp.shmem_evict_inode.evict.do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.80 ± 16% -0.5 1.26 ± 16% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.shmem_free_inode.shmem_evict_inode.evict
0.96 ± 11% -0.3 0.62 ± 5% perf-profile.calltrace.cycles-pp.__call_rcu.security_inode_free.__destroy_inode.destroy_inode.do_unlinkat
0.86 ± 10% -0.3 0.55 ± 5% perf-profile.calltrace.cycles-pp.rcu_segcblist_enqueue.__call_rcu.security_inode_free.__destroy_inode.destroy_inode
0.75 ± 8% -0.3 0.47 ± 59% perf-profile.calltrace.cycles-pp.security_inode_init_security.shmem_mknod.path_openat.do_filp_open.do_sys_open
0.70 ± 8% -0.3 0.43 ± 58% perf-profile.calltrace.cycles-pp.selinux_inode_init_security.security_inode_init_security.shmem_mknod.path_openat.do_filp_open
1.07 ± 6% -0.2 0.82 ± 7% perf-profile.calltrace.cycles-pp.security_inode_create.path_openat.do_filp_open.do_sys_open.do_syscall_64
1.01 ± 6% -0.2 0.77 ± 8% perf-profile.calltrace.cycles-pp.may_create.security_inode_create.path_openat.do_filp_open.do_sys_open
0.26 ±100% +0.4 0.63 ± 7% perf-profile.calltrace.cycles-pp._raw_spin_lock.new_inode_pseudo.new_inode.shmem_get_inode.shmem_mknod
0.77 ± 7% +0.4 1.16 ± 2% perf-profile.calltrace.cycles-pp.inode_wait_for_writeback.evict.do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.74 ± 7% +0.4 1.14 ± 2% perf-profile.calltrace.cycles-pp._raw_spin_lock.inode_wait_for_writeback.evict.do_unlinkat.do_syscall_64
1.30 ± 9% +0.7 2.00 ± 8% perf-profile.calltrace.cycles-pp.do_dentry_open.path_openat.do_filp_open.do_sys_open.do_syscall_64
0.00 +0.8 0.78 ± 6% perf-profile.calltrace.cycles-pp.fsnotify.do_sys_open.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.94 ± 6% +0.8 1.72 ± 3% perf-profile.calltrace.cycles-pp.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.86 ± 6% +0.8 1.64 ± 3% perf-profile.calltrace.cycles-pp.task_work_run.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.00 +0.8 0.79 ± 17% perf-profile.calltrace.cycles-pp.smp_apic_timer_interrupt.apic_timer_interrupt.native_queued_spin_lock_slowpath._raw_spin_lock.evict
0.00 +0.8 0.79 ± 4% perf-profile.calltrace.cycles-pp.fsnotify.do_dentry_open.path_openat.do_filp_open.do_sys_open
0.00 +0.8 0.79 ± 17% perf-profile.calltrace.cycles-pp.apic_timer_interrupt.native_queued_spin_lock_slowpath._raw_spin_lock.evict.do_unlinkat
0.00 +0.8 0.80 ± 18% perf-profile.calltrace.cycles-pp.smp_apic_timer_interrupt.apic_timer_interrupt.native_queued_spin_lock_slowpath._raw_spin_lock.inode_sb_list_add
0.00 +0.8 0.81 ± 18% perf-profile.calltrace.cycles-pp.apic_timer_interrupt.native_queued_spin_lock_slowpath._raw_spin_lock.inode_sb_list_add.new_inode
0.00 +0.9 0.85 perf-profile.calltrace.cycles-pp.fsnotify.__fput.task_work_run.exit_to_usermode_loop.do_syscall_64
0.27 ±100% +1.0 1.29 ± 2% perf-profile.calltrace.cycles-pp.__fput.task_work_run.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.27 ±173% +1.2 1.50 ± 19% perf-profile.calltrace.cycles-pp.rcu_process_callbacks.__softirqentry_text_start.irq_exit.smp_apic_timer_interrupt.apic_timer_interrupt
0.27 ±173% +1.2 1.51 ± 18% perf-profile.calltrace.cycles-pp.irq_exit.smp_apic_timer_interrupt.apic_timer_interrupt.native_queued_spin_lock_slowpath._raw_spin_lock
0.27 ±173% +1.2 1.51 ± 18% perf-profile.calltrace.cycles-pp.__softirqentry_text_start.irq_exit.smp_apic_timer_interrupt.apic_timer_interrupt.native_queued_spin_lock_slowpath
6.36 ± 9% +8.3 14.64 ± 8% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.inode_sb_list_add.new_inode.shmem_get_inode
14.67 ± 8% +8.4 23.08 ± 5% perf-profile.calltrace.cycles-pp.shmem_get_inode.shmem_mknod.path_openat.do_filp_open.do_sys_open
6.72 ± 9% +8.4 15.14 ± 8% perf-profile.calltrace.cycles-pp._raw_spin_lock.inode_sb_list_add.new_inode.shmem_get_inode.shmem_mknod
11.87 ± 7% +8.4 20.30 ± 5% perf-profile.calltrace.cycles-pp.evict.do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe
6.19 ± 7% +8.5 14.67 ± 7% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.evict.do_unlinkat.do_syscall_64
7.41 ± 9% +8.6 15.96 ± 7% perf-profile.calltrace.cycles-pp.inode_sb_list_add.new_inode.shmem_get_inode.shmem_mknod.path_openat
10.33 ± 8% +8.6 18.95 ± 6% perf-profile.calltrace.cycles-pp.new_inode.shmem_get_inode.shmem_mknod.path_openat.do_filp_open
6.93 ± 7% +8.8 15.71 ± 7% perf-profile.calltrace.cycles-pp._raw_spin_lock.evict.do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe
11.14 ± 15% -7.2 3.93 ± 6% perf-profile.children.cycles-pp.d_instantiate
11.81 ± 14% -7.0 4.76 ± 4% perf-profile.children.cycles-pp.__destroy_inode
11.97 ± 14% -7.0 4.95 ± 5% perf-profile.children.cycles-pp.destroy_inode
10.89 ± 15% -7.0 3.88 ± 4% perf-profile.children.cycles-pp.security_inode_free
10.04 ± 17% -6.7 3.33 ± 7% perf-profile.children.cycles-pp.inode_doinit_with_dentry
10.07 ± 17% -6.7 3.37 ± 6% perf-profile.children.cycles-pp.security_d_instantiate
9.91 ± 16% -6.7 3.24 ± 5% perf-profile.children.cycles-pp.selinux_inode_free_security
3.09 ± 11% -0.6 2.49 ± 11% perf-profile.children.cycles-pp.shmem_evict_inode
0.84 ± 9% -0.4 0.46 ± 46% perf-profile.children.cycles-pp.selinux_determine_inode_label
1.32 ± 9% -0.3 0.99 ± 4% perf-profile.children.cycles-pp.__call_rcu
0.98 ± 9% -0.3 0.66 ± 5% perf-profile.children.cycles-pp.rcu_segcblist_enqueue
1.07 ± 6% -0.2 0.83 ± 8% perf-profile.children.cycles-pp.security_inode_create
0.94 ± 7% -0.2 0.69 ± 9% perf-profile.children.cycles-pp.__list_del_entry_valid
1.01 ± 7% -0.2 0.77 ± 8% perf-profile.children.cycles-pp.may_create
0.37 ± 6% -0.2 0.16 ± 6% perf-profile.children.cycles-pp.__fd_install
0.75 ± 8% -0.2 0.58 ± 16% perf-profile.children.cycles-pp.security_inode_init_security
0.70 ± 8% -0.2 0.54 ± 17% perf-profile.children.cycles-pp.selinux_inode_init_security
0.42 ± 8% -0.1 0.36 ± 4% perf-profile.children.cycles-pp.d_delete
0.21 ± 8% -0.1 0.16 ± 13% perf-profile.children.cycles-pp._atomic_dec_and_lock
0.34 ± 6% -0.1 0.29 ± 5% perf-profile.children.cycles-pp.fsnotify_destroy_marks
0.24 ± 8% -0.0 0.21 ± 7% perf-profile.children.cycles-pp.down_write
0.06 ± 14% +0.0 0.08 ± 15% perf-profile.children.cycles-pp.prandom_u32_state
0.12 ± 8% +0.0 0.16 ± 7% perf-profile.children.cycles-pp.__d_instantiate
0.77 ± 7% +0.4 1.17 ± 2% perf-profile.children.cycles-pp.inode_wait_for_writeback
1.30 ± 9% +0.7 2.00 ± 8% perf-profile.children.cycles-pp.do_dentry_open
0.94 ± 6% +0.8 1.73 ± 3% perf-profile.children.cycles-pp.exit_to_usermode_loop
0.86 ± 6% +0.8 1.65 ± 2% perf-profile.children.cycles-pp.task_work_run
0.51 ± 8% +0.8 1.30 ± 2% perf-profile.children.cycles-pp.__fput
0.23 ± 13% +2.3 2.52 ± 4% perf-profile.children.cycles-pp.fsnotify
14.69 ± 8% +8.4 23.11 ± 5% perf-profile.children.cycles-pp.shmem_get_inode
11.88 ± 7% +8.4 20.30 ± 5% perf-profile.children.cycles-pp.evict
7.42 ± 9% +8.6 15.97 ± 7% perf-profile.children.cycles-pp.inode_sb_list_add
10.33 ± 8% +8.6 18.95 ± 6% perf-profile.children.cycles-pp.new_inode
0.74 ± 9% -0.4 0.37 ± 59% perf-profile.self.cycles-pp.selinux_determine_inode_label
0.97 ± 9% -0.3 0.66 ± 5% perf-profile.self.cycles-pp.rcu_segcblist_enqueue
0.92 ± 7% -0.2 0.68 ± 9% perf-profile.self.cycles-pp.__list_del_entry_valid
0.36 ± 5% -0.2 0.16 ± 7% perf-profile.self.cycles-pp.__fd_install
0.41 ± 18% -0.2 0.22 ± 14% perf-profile.self.cycles-pp.inode_doinit_with_dentry
0.15 ± 12% -0.0 0.10 ± 10% perf-profile.self.cycles-pp._atomic_dec_and_lock
0.14 ± 8% -0.0 0.11 ± 6% perf-profile.self.cycles-pp.down_write
0.08 ± 11% +0.0 0.11 ± 4% perf-profile.self.cycles-pp.__d_instantiate
0.10 ± 10% +0.0 0.14 ± 7% perf-profile.self.cycles-pp.inode_sb_list_add
0.22 ± 12% +2.2 2.47 ± 3% perf-profile.self.cycles-pp.fsnotify
will-it-scale.workload
940000 +-+----------------------------------------------------------------+
| + + :: |
920000 +-+ : :: .+ : : |
900000 +-+ +. + : : : : + + : : |
| + : +. : + : : .+ .+. : :+ +. .+.: + +. |
880000 +-+: + : +. : + + : +. .+ + + + + + : : + |
|: : + + + + :+ + : : +|
860000 +-+ + + :: |
| + |
840000 +-+ O |
820000 O-+ O O O O O O O O O |
| O O O O |
800000 +-+ O O O O O O O |
| O O O O O |
780000 +-+----------------------------------------------------------------+
[*] 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.
Thanks,
Rong Chen
View attachment "config-4.19.0-rc2-00007-g60f7ed8" of type "text/plain" (167672 bytes)
View attachment "job-script" of type "text/plain" (6935 bytes)
View attachment "job.yaml" of type "text/plain" (4591 bytes)
View attachment "reproduce" of type "text/plain" (310 bytes)
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