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Message-ID: <20200618005117.GB5279@shao2-debian>
Date: Thu, 18 Jun 2020 08:51:17 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: [pipe] 566d136289: stress-ng.tee.ops_per_sec -84.7% regression
Greeting,
FYI, we noticed a -84.7% regression of stress-ng.tee.ops_per_sec due to commit:
commit: 566d136289dc57816ac290de87a9a0f7d9bd3cbb ("pipe: Fix pipe_full() test in opipe_prep().")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: stress-ng
on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 128G memory
with following parameters:
nr_threads: 100%
disk: 1HDD
sc_pid_max: 4194304
testtime: 1s
class: scheduler
cpufreq_governor: performance
ucode: 0xb000038
In addition to that, the commit also has significant impact on the following tests:
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
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
=========================================================================================
class/compiler/cpufreq_governor/disk/kconfig/nr_threads/rootfs/sc_pid_max/tbox_group/testcase/testtime/ucode:
scheduler/gcc-7/performance/1HDD/x86_64-rhel-7.6/100%/debian-x86_64-20191114.cgz/4194304/lkp-bdw-ep6/stress-ng/1s/0xb000038
commit:
115a54162a ("Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs")
566d136289 ("pipe: Fix pipe_full() test in opipe_prep().")
115a54162a6c0d0e 566d136289dc57816ac290de87a
---------------- ---------------------------
%stddev %change %stddev
\ | \
549404 ± 9% +18.1% 648858 ± 13% stress-ng.affinity.ops
543194 ± 9% +18.6% 644077 ± 13% stress-ng.affinity.ops_per_sec
2376013 ± 23% -84.7% 363639 ± 19% stress-ng.tee.ops_per_sec
668966 ± 29% -32.7% 450302 ± 17% cpuidle.POLL.usage
7750890 ± 15% +32.9% 10298845 ± 8% meminfo.DirectMap2M
18658 ± 2% +8.8% 20308 ± 2% proc-vmstat.nr_page_table_pages
31083952 ± 6% -9.0% 28278712 ± 6% proc-vmstat.pgfault
1519 ± 19% -27.3% 1104 ± 8% sched_debug.cfs_rq:/.util_avg.max
95.69 ± 12% +20.9% 115.73 ± 8% sched_debug.cfs_rq:/.util_est_enqueued.stddev
2305 ± 2% +15.1% 2654 ± 2% slabinfo.task_group.active_objs
2305 ± 2% +15.1% 2654 ± 2% slabinfo.task_group.num_objs
1501755 -9.1% 1365035 ± 10% perf-stat.i.context-switches
11721777 ± 4% -7.8% 10804056 perf-stat.i.iTLB-loads
0.32 ± 2% -3.6% 0.31 ± 2% perf-stat.i.ipc
11.41 ± 3% +8.7% 12.39 ± 3% perf-stat.overall.MPKI
64.50 +1.9 66.38 perf-stat.overall.iTLB-load-miss-rate%
6.252e+08 +5.1% 6.574e+08 perf-stat.ps.cache-references
1386747 ± 2% -8.8% 1264746 ± 8% perf-stat.ps.context-switches
9976 ± 16% +32.1% 13175 ± 21% softirqs.CPU14.RCU
29368 +35.9% 39921 ± 25% softirqs.CPU14.TIMER
12696 ±171% -99.7% 42.75 ± 16% softirqs.CPU15.NET_RX
8568 ± 2% +16.8% 10007 ± 15% softirqs.CPU18.SCHED
12197 ± 10% -16.1% 10229 ± 5% softirqs.CPU24.RCU
11990 ± 12% +23.1% 14759 ± 2% softirqs.CPU25.RCU
11449 -9.8% 10328 ± 3% softirqs.CPU42.RCU
11154 ± 5% -9.9% 10051 ± 4% softirqs.CPU43.RCU
8637 ± 3% +10.0% 9502 ± 5% softirqs.CPU65.SCHED
11075 ± 7% -9.6% 10015 ± 7% softirqs.CPU71.RCU
11622 ± 3% -12.2% 10204 ± 3% softirqs.CPU77.RCU
47890 ± 3% +8.3% 51887 ± 7% softirqs.NET_RX
16041 ±172% -99.8% 39.50 ± 40% interrupts.35:IR-PCI-MSI.1572866-edge.eth0-TxRx-1
18539 ± 29% +244.4% 63844 ± 36% interrupts.CPU13.RES:Rescheduling_interrupts
43700 ± 43% -62.7% 16294 ± 15% interrupts.CPU14.RES:Rescheduling_interrupts
16041 ±172% -99.8% 39.50 ± 40% interrupts.CPU15.35:IR-PCI-MSI.1572866-edge.eth0-TxRx-1
26345 ± 40% +167.3% 70408 ± 32% interrupts.CPU18.RES:Rescheduling_interrupts
20745 ± 15% +229.0% 68259 ± 14% interrupts.CPU2.RES:Rescheduling_interrupts
4907 ± 12% +14.6% 5621 ± 5% interrupts.CPU20.CAL:Function_call_interrupts
19478 ± 27% +190.3% 56540 ± 34% interrupts.CPU20.RES:Rescheduling_interrupts
49136 ± 40% -61.2% 19058 ± 14% interrupts.CPU42.RES:Rescheduling_interrupts
22949 ± 28% +167.7% 61439 ± 23% interrupts.CPU45.RES:Rescheduling_interrupts
4897 ± 15% +16.4% 5700 ± 11% interrupts.CPU46.CAL:Function_call_interrupts
28.00 ±122% +914.3% 284.00 ±136% interrupts.CPU46.IWI:IRQ_work_interrupts
24257 ± 45% +142.0% 58699 ± 38% interrupts.CPU59.RES:Rescheduling_interrupts
5.00 ± 92% +3055.0% 157.75 ±148% interrupts.CPU6.IWI:IRQ_work_interrupts
22519 ± 21% +190.0% 65311 ± 17% interrupts.CPU60.RES:Rescheduling_interrupts
2039 ± 10% +45.4% 2964 ± 13% interrupts.CPU64.TLB:TLB_shootdowns
17409 ± 10% +228.5% 57183 ± 28% interrupts.CPU65.RES:Rescheduling_interrupts
37695 ± 46% -62.2% 14231 ± 14% interrupts.CPU75.RES:Rescheduling_interrupts
5079 ± 11% -15.3% 4303 ± 9% interrupts.CPU77.CAL:Function_call_interrupts
2.13 ± 4% -0.3 1.83 ± 12% perf-profile.calltrace.cycles-pp.inode_sb_list_add.new_inode.ramfs_get_inode.ramfs_mknod.path_openat
2.10 ± 4% -0.3 1.80 ± 12% perf-profile.calltrace.cycles-pp._raw_spin_lock.inode_sb_list_add.new_inode.ramfs_get_inode.ramfs_mknod
2.29 ± 4% -0.3 2.00 ± 11% perf-profile.calltrace.cycles-pp.ramfs_mknod.path_openat.do_filp_open.do_sys_openat2.do_sys_open
2.24 ± 4% -0.3 1.94 ± 11% perf-profile.calltrace.cycles-pp.new_inode.ramfs_get_inode.ramfs_mknod.path_openat.do_filp_open
2.07 ± 4% -0.3 1.77 ± 12% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.inode_sb_list_add.new_inode.ramfs_get_inode
2.27 ± 4% -0.3 1.98 ± 11% perf-profile.calltrace.cycles-pp.ramfs_get_inode.ramfs_mknod.path_openat.do_filp_open.do_sys_openat2
3.54 ± 3% -0.3 3.25 ± 8% perf-profile.calltrace.cycles-pp.path_openat.do_filp_open.do_sys_openat2.do_sys_open.do_syscall_64
3.55 ± 3% -0.3 3.26 ± 8% perf-profile.calltrace.cycles-pp.do_filp_open.do_sys_openat2.do_sys_open.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.02 ± 4% -0.1 0.88 ± 13% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.evict.do_unlinkat.do_syscall_64
1.03 ± 4% -0.1 0.90 ± 13% perf-profile.calltrace.cycles-pp._raw_spin_lock.evict.do_unlinkat.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.68 ± 5% -0.1 0.63 ± 8% perf-profile.calltrace.cycles-pp.fanotify_merge.fsnotify_add_event.fanotify_handle_event.fsnotify.do_sys_openat2
3.14 ± 2% +0.1 3.25 ± 3% perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.__wake_up_common.eventfd_write.vfs_write
3.22 +0.1 3.36 ± 3% perf-profile.calltrace.cycles-pp.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe.munmap
3.42 ± 2% +0.2 3.64 ± 2% perf-profile.calltrace.cycles-pp.mmap64
1.59 ± 5% +0.2 1.82 ± 8% perf-profile.calltrace.cycles-pp.__shmem_file_setup.shmem_zero_setup.mmap_region.do_mmap.vm_mmap_pgoff
3.34 ± 2% +0.2 3.57 ± 3% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.mmap64
1.59 ± 5% +0.2 1.82 ± 8% perf-profile.calltrace.cycles-pp.shmem_zero_setup.mmap_region.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff
3.34 ± 2% +0.2 3.57 ± 3% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.mmap64
1.45 ± 5% +0.2 1.68 ± 9% perf-profile.calltrace.cycles-pp.shmem_get_inode.__shmem_file_setup.shmem_zero_setup.mmap_region.do_mmap
3.24 ± 2% +0.2 3.48 ± 2% perf-profile.calltrace.cycles-pp.ksys_mmap_pgoff.do_syscall_64.entry_SYSCALL_64_after_hwframe.mmap64
3.23 ± 2% +0.2 3.46 ± 3% perf-profile.calltrace.cycles-pp.vm_mmap_pgoff.ksys_mmap_pgoff.do_syscall_64.entry_SYSCALL_64_after_hwframe.mmap64
2.31 ± 4% -0.3 2.01 ± 11% perf-profile.children.cycles-pp.ramfs_mknod
2.29 ± 4% -0.3 1.99 ± 11% perf-profile.children.cycles-pp.ramfs_get_inode
0.07 ± 7% -0.0 0.04 ± 58% perf-profile.children.cycles-pp.percpu_counter_add_batch
0.15 ± 3% -0.0 0.14 ± 6% perf-profile.children.cycles-pp.native_flush_tlb_one_user
0.10 ± 12% +0.0 0.12 ± 8% perf-profile.children.cycles-pp.vma_interval_tree_remove
0.09 ± 27% +0.0 0.12 ± 16% perf-profile.children.cycles-pp.move_queued_task
0.13 ± 21% +0.0 0.17 ± 11% perf-profile.children.cycles-pp.__set_cpus_allowed_ptr
0.06 ± 65% +0.1 0.11 ± 18% perf-profile.children.cycles-pp.rwsem_wake
3.59 ± 2% +0.2 3.80 ± 2% perf-profile.children.cycles-pp.vm_mmap_pgoff
3.51 ± 2% +0.2 3.72 ± 2% perf-profile.children.cycles-pp.ksys_mmap_pgoff
3.50 ± 2% +0.2 3.73 ± 2% perf-profile.children.cycles-pp.mmap64
1.59 ± 5% +0.2 1.82 ± 8% perf-profile.children.cycles-pp.__shmem_file_setup
1.59 ± 5% +0.2 1.82 ± 8% perf-profile.children.cycles-pp.shmem_zero_setup
7.90 +0.2 8.13 ± 2% perf-profile.children.cycles-pp.task_work_run
0.15 ± 3% -0.0 0.14 ± 6% perf-profile.self.cycles-pp.native_flush_tlb_one_user
stress-ng.tee.ops_per_sec
4e+06 +-----------------------------------------------------------------+
| .+... |
3.5e+06 |... .. +....+.. .+...+.. |
3e+06 |-+ + . .. . + |
| + + +. : + |
2.5e+06 |-+ : .. .. : + |
| : . . : + |
2e+06 |-+ : .+ : + |
| : .. + |
1.5e+06 |-+ + |
1e+06 |-+ |
| |
500000 |-+ O |
| O O O O O O O O O O O O O O |
0 +-----------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
***************************************************************************************************
lkp-bdw-ep6: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 128G memory
=========================================================================================
class/compiler/cpufreq_governor/disk/kconfig/nr_threads/rootfs/sc_pid_max/tbox_group/testcase/testtime/ucode:
scheduler/gcc-9/performance/1HDD/x86_64-rhel-7.6/100%/debian-x86_64-20191114.cgz/4194304/lkp-bdw-ep6/stress-ng/10s/0xb000038
commit:
115a54162a ("Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs")
566d136289 ("pipe: Fix pipe_full() test in opipe_prep().")
115a54162a6c0d0e 566d136289dc57816ac290de87a
---------------- ---------------------------
fail:runs %reproduction fail:runs
| | |
0:1 -1% 0:1 perf-profile.children.cycles-pp.error_entry
0:1 -1% 0:1 perf-profile.self.cycles-pp.error_entry
***************************************************************************************************
lkp-bdw-ep6: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 128G memory
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-5.7.0-rc6-00038-g566d136289dc5" of type "text/plain" (202622 bytes)
View attachment "job-script" of type "text/plain" (7824 bytes)
View attachment "job.yaml" of type "text/plain" (5371 bytes)
View attachment "reproduce" of type "text/plain" (438 bytes)
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