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Message-ID: <202505160923.2556b729-lkp@intel.com>
Date: Fri, 16 May 2025 10:13:11 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Peter Zijlstra <peterz@...radead.org>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
<x86@...nel.org>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
<oliver.sang@...el.com>
Subject: [tip:locking/futex] [futex] cec199c5e3:
will-it-scale.per_thread_ops 3.2% regression
Hello,
kernel test robot noticed a 3.2% regression of will-it-scale.per_thread_ops on:
commit: cec199c5e39bde7191a08087cc3d002ccfab31ff ("futex: Implement FUTEX2_NUMA")
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git locking/futex
[test failed on linux-next/master bdd609656ff5573db9ba1d26496a528bdd297cf2]
testcase: will-it-scale
config: x86_64-rhel-9.4
compiler: gcc-12
test machine: 256 threads 2 sockets GENUINE INTEL(R) XEON(R) (Sierra Forest) with 128G memory
parameters:
nr_task: 100%
mode: thread
test: futex1
cpufreq_governor: performance
In addition to that, the commit also has significant impact on the following tests:
+------------------+---------------------------------------------------------------------------------+
| testcase: change | will-it-scale: will-it-scale.per_process_ops 4.6% regression |
| test machine | 384 threads 2 sockets Intel(R) Xeon(R) 6972P (Granite Rapids) with 128G memory |
| test parameters | cpufreq_governor=performance |
| | mode=process |
| | nr_task=100% |
| | test=futex4 |
+------------------+---------------------------------------------------------------------------------+
| testcase: change | will-it-scale: will-it-scale.per_thread_ops 3.4% regression |
| test machine | 256 threads 2 sockets GENUINE INTEL(R) XEON(R) (Sierra Forest) with 128G memory |
| test parameters | cpufreq_governor=performance |
| | mode=thread |
| | nr_task=100% |
| | test=futex2 |
+------------------+---------------------------------------------------------------------------------+
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202505160923.2556b729-lkp@intel.com
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250516/202505160923.2556b729-lkp@intel.com
=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
gcc-12/performance/x86_64-rhel-9.4/thread/100%/debian-12-x86_64-20240206.cgz/lkp-srf-2sp1/futex1/will-it-scale
commit:
63e8595c06 ("futex: Allow to make the private hash immutable")
cec199c5e3 ("futex: Implement FUTEX2_NUMA")
63e8595c060a1fef cec199c5e39bde7191a08087cc3
---------------- ---------------------------
%stddev %change %stddev
\ | \
1.079e+09 ± 58% -45.0% 5.934e+08 ± 3% cpuidle..time
1.38 ± 53% -0.7 0.64 ± 6% mpstat.cpu.all.idle%
4521392 ± 27% -41.0% 2666361 ± 55% numa-meminfo.node0.MemUsed
3133949 ± 39% +59.9% 5010749 ± 29% numa-meminfo.node1.MemUsed
1.224e+09 -3.2% 1.185e+09 will-it-scale.256.threads
4780060 -3.2% 4627197 will-it-scale.per_thread_ops
1.224e+09 -3.2% 1.185e+09 will-it-scale.workload
0.04 ± 24% -29.3% 0.03 ± 37% perf-stat.i.major-faults
3964 ± 2% -3.6% 3821 perf-stat.i.minor-faults
3964 ± 2% -3.6% 3821 perf-stat.i.page-faults
322627 +3.7% 334580 perf-stat.overall.path-length
0.04 ± 24% -30.0% 0.03 ± 36% perf-stat.ps.major-faults
3934 ± 2% -3.8% 3785 perf-stat.ps.minor-faults
3934 ± 2% -3.8% 3785 perf-stat.ps.page-faults
0.07 ± 26% -39.6% 0.04 ± 36% perf-sched.sch_delay.avg.ms.anon_pipe_read.vfs_read.ksys_read.do_syscall_64
0.11 ± 16% +38.2% 0.15 ± 25% perf-sched.sch_delay.avg.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown]
66.89 ± 7% -30.1% 46.79 ± 27% perf-sched.wait_and_delay.avg.ms.anon_pipe_read.vfs_read.ksys_read.do_syscall_64
11.66 ± 90% +124.7% 26.19 ± 27% perf-sched.wait_and_delay.avg.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.x64_sys_call
0.22 ± 16% +38.5% 0.30 ± 25% perf-sched.wait_and_delay.avg.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown]
414.50 ± 7% +59.5% 661.00 ± 40% perf-sched.wait_and_delay.count.anon_pipe_read.vfs_read.ksys_read.do_syscall_64
66.83 ± 7% -30.0% 46.75 ± 27% perf-sched.wait_time.avg.ms.anon_pipe_read.vfs_read.ksys_read.do_syscall_64
11.66 ± 90% +124.7% 26.19 ± 27% perf-sched.wait_time.avg.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.x64_sys_call
0.11 ± 16% +38.2% 0.15 ± 25% perf-sched.wait_time.avg.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown]
28.45 -3.5 24.98 perf-profile.calltrace.cycles-pp.get_user_pages_fast.get_futex_key.futex_wake.do_futex.__x64_sys_futex
27.02 -3.3 23.74 perf-profile.calltrace.cycles-pp.gup_fast_fallback.get_user_pages_fast.get_futex_key.futex_wake.do_futex
24.86 -2.4 22.46 perf-profile.calltrace.cycles-pp.gup_fast.gup_fast_fallback.get_user_pages_fast.get_futex_key.futex_wake
22.10 -1.9 20.22 perf-profile.calltrace.cycles-pp.gup_fast_pgd_range.gup_fast.gup_fast_fallback.get_user_pages_fast.get_futex_key
30.86 -1.0 29.84 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.syscall
15.86 -0.3 15.57 perf-profile.calltrace.cycles-pp.gup_fast_pte_range.gup_fast_pgd_range.gup_fast.gup_fast_fallback.get_user_pages_fast
7.01 -0.2 6.79 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
3.97 -0.1 3.83 perf-profile.calltrace.cycles-pp.entry_SYSRETQ_unsafe_stack.syscall
4.28 -0.1 4.14 perf-profile.calltrace.cycles-pp.try_get_folio.gup_fast_pte_range.gup_fast_pgd_range.gup_fast.gup_fast_fallback
0.75 -0.1 0.62 perf-profile.calltrace.cycles-pp.is_valid_gup_args.get_user_pages_fast.get_futex_key.futex_wake.do_futex
1.18 -0.1 1.08 perf-profile.calltrace.cycles-pp.___pte_offset_map.gup_fast_pte_range.gup_fast_pgd_range.gup_fast.gup_fast_fallback
3.04 -0.1 2.95 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.syscall
2.53 -0.0 2.50 perf-profile.calltrace.cycles-pp.testcase
0.60 -0.0 0.58 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.syscall
0.65 -0.0 0.63 perf-profile.calltrace.cycles-pp.x64_sys_call.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
55.34 +1.5 56.83 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
53.05 +1.6 54.61 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
43.57 +1.9 45.44 perf-profile.calltrace.cycles-pp.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
42.42 +1.9 44.33 perf-profile.calltrace.cycles-pp.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
41.62 +1.9 43.54 perf-profile.calltrace.cycles-pp.futex_wake.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.05 +2.1 4.17 ± 8% perf-profile.calltrace.cycles-pp.futex_hash.futex_wake.do_futex.__x64_sys_futex.do_syscall_64
0.00 +3.6 3.63 ± 9% perf-profile.calltrace.cycles-pp.__futex_hash.futex_hash.futex_wake.do_futex.__x64_sys_futex
28.77 -3.7 25.06 perf-profile.children.cycles-pp.get_user_pages_fast
27.11 -3.3 23.82 perf-profile.children.cycles-pp.gup_fast_fallback
24.95 -2.4 22.56 perf-profile.children.cycles-pp.gup_fast
22.15 -1.9 20.25 perf-profile.children.cycles-pp.gup_fast_pgd_range
20.83 -0.7 20.14 perf-profile.children.cycles-pp.entry_SYSCALL_64
16.00 -0.6 15.44 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
15.99 -0.3 15.68 perf-profile.children.cycles-pp.gup_fast_pte_range
7.06 -0.2 6.84 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
0.77 -0.2 0.62 perf-profile.children.cycles-pp.is_valid_gup_args
4.33 -0.1 4.18 perf-profile.children.cycles-pp.try_get_folio
1.20 -0.1 1.10 perf-profile.children.cycles-pp.___pte_offset_map
2.70 -0.1 2.62 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
2.03 -0.0 2.00 perf-profile.children.cycles-pp.testcase
0.65 -0.0 0.63 perf-profile.children.cycles-pp.x64_sys_call
0.65 -0.0 0.63 perf-profile.children.cycles-pp.syscall_return_via_sysret
0.10 +0.0 0.11 perf-profile.children.cycles-pp.sysvec_thermal
0.09 +0.0 0.10 perf-profile.children.cycles-pp.intel_thermal_interrupt
0.10 ± 4% +0.0 0.12 ± 4% perf-profile.children.cycles-pp.asm_sysvec_thermal
98.25 +0.0 98.30 perf-profile.children.cycles-pp.syscall
55.48 +1.5 56.95 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
53.22 +1.5 54.76 perf-profile.children.cycles-pp.do_syscall_64
43.57 +1.9 45.44 perf-profile.children.cycles-pp.__x64_sys_futex
42.46 +1.9 44.36 perf-profile.children.cycles-pp.do_futex
41.72 +1.9 43.64 perf-profile.children.cycles-pp.futex_wake
2.09 +2.1 4.22 ± 8% perf-profile.children.cycles-pp.futex_hash
0.00 +3.7 3.67 ± 9% perf-profile.children.cycles-pp.__futex_hash
6.11 -1.6 4.52 perf-profile.self.cycles-pp.gup_fast_pgd_range
2.04 -1.5 0.50 ± 5% perf-profile.self.cycles-pp.futex_hash
1.96 -0.7 1.29 perf-profile.self.cycles-pp.gup_fast_fallback
15.96 -0.6 15.40 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
1.10 -0.5 0.62 perf-profile.self.cycles-pp.get_user_pages_fast
2.71 -0.5 2.24 perf-profile.self.cycles-pp.gup_fast
14.25 -0.5 13.78 perf-profile.self.cycles-pp.syscall
10.14 -0.3 9.81 perf-profile.self.cycles-pp.entry_SYSCALL_64
6.69 -0.2 6.48 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
4.85 -0.2 4.68 perf-profile.self.cycles-pp.futex_wake
0.72 -0.1 0.58 perf-profile.self.cycles-pp.is_valid_gup_args
4.31 -0.1 4.17 perf-profile.self.cycles-pp.try_get_folio
1.98 -0.1 1.91 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
1.12 -0.1 1.05 perf-profile.self.cycles-pp.___pte_offset_map
2.06 -0.1 1.99 perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
1.75 -0.1 1.70 perf-profile.self.cycles-pp.do_syscall_64
1.10 -0.0 1.07 perf-profile.self.cycles-pp.__x64_sys_futex
0.78 -0.0 0.75 perf-profile.self.cycles-pp.do_futex
0.65 -0.0 0.63 perf-profile.self.cycles-pp.syscall_return_via_sysret
0.60 -0.0 0.58 perf-profile.self.cycles-pp.x64_sys_call
0.19 -0.0 0.18 perf-profile.self.cycles-pp.futex_hash_put
0.05 +0.0 0.06 perf-profile.self.cycles-pp.intel_thermal_interrupt
0.00 +3.7 3.65 ± 9% perf-profile.self.cycles-pp.__futex_hash
5.84 +3.7 9.49 perf-profile.self.cycles-pp.get_futex_key
***************************************************************************************************
lkp-gnr-2ap2: 384 threads 2 sockets Intel(R) Xeon(R) 6972P (Granite Rapids) with 128G memory
=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
gcc-12/performance/x86_64-rhel-9.4/process/100%/debian-12-x86_64-20240206.cgz/lkp-gnr-2ap2/futex4/will-it-scale
commit:
63e8595c06 ("futex: Allow to make the private hash immutable")
cec199c5e3 ("futex: Implement FUTEX2_NUMA")
63e8595c060a1fef cec199c5e39bde7191a08087cc3
---------------- ---------------------------
%stddev %change %stddev
\ | \
0.72 ± 4% +0.1 0.82 ± 6% mpstat.cpu.all.irq%
2699383 -13.4% 2337183 ± 6% numa-meminfo.node1.Shmem
123578 ±102% +116.6% 267679 ± 25% numa-numastat.node1.other_node
123578 ±102% +116.6% 267679 ± 25% numa-vmstat.node1.numa_other
2.323e+09 -4.6% 2.216e+09 will-it-scale.384.processes
6049881 -4.6% 5771879 will-it-scale.per_process_ops
2.323e+09 -4.6% 2.216e+09 will-it-scale.workload
2.14 ± 53% -69.0% 0.66 ±149% perf-sched.sch_delay.avg.ms.schedule_timeout.khugepaged_wait_work.khugepaged.kthread
2.14 ± 53% -69.0% 0.66 ±149% perf-sched.sch_delay.max.ms.schedule_timeout.khugepaged_wait_work.khugepaged.kthread
351.13 ±130% +836.1% 3286 ± 49% perf-sched.wait_and_delay.max.ms.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.[unknown]
2.14 ± 53% -68.9% 0.67 ±148% perf-sched.wait_time.avg.ms.schedule_timeout.khugepaged_wait_work.khugepaged.kthread
2.14 ± 53% -68.9% 0.67 ±148% perf-sched.wait_time.max.ms.schedule_timeout.khugepaged_wait_work.khugepaged.kthread
342.14 ±135% +860.6% 3286 ± 49% perf-sched.wait_time.max.ms.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.[unknown]
2.319e+11 +1.8% 2.361e+11 perf-stat.i.branch-instructions
0.92 ± 4% -4.3% 0.88 perf-stat.i.cpi
1.473e+12 +2.2% 1.506e+12 perf-stat.i.instructions
1.11 +2.2% 1.14 perf-stat.i.ipc
0.89 -1.6% 0.88 perf-stat.overall.cpi
1.12 +1.6% 1.14 perf-stat.overall.ipc
193483 +6.3% 205704 perf-stat.overall.path-length
2.31e+11 +1.8% 2.353e+11 perf-stat.ps.branch-instructions
1.468e+12 +2.3% 1.501e+12 perf-stat.ps.instructions
4.495e+14 +1.4% 4.559e+14 perf-stat.total.instructions
3.43 ± 2% -0.6 2.82 ± 2% perf-profile.calltrace.cycles-pp.futex_q_unlock.futex_wait_setup.__futex_wait.futex_wait.do_futex
28.24 -0.6 27.62 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.syscall
9.46 -0.5 8.95 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
3.36 -0.3 3.10 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.syscall
1.76 -0.1 1.68 ± 2% perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.syscall
1.31 -0.1 1.23 perf-profile.calltrace.cycles-pp.testcase
1.13 -0.1 1.06 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
2.09 -0.0 2.04 perf-profile.calltrace.cycles-pp.x64_sys_call.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
1.64 -0.0 1.61 perf-profile.calltrace.cycles-pp.futex_hash_put.futex_wait_setup.__futex_wait.futex_wait.do_futex
0.72 -0.0 0.70 perf-profile.calltrace.cycles-pp.entry_SYSRETQ_unsafe_stack.syscall
2.16 +0.5 2.63 perf-profile.calltrace.cycles-pp.get_futex_key.futex_wait_setup.__futex_wait.futex_wait.do_futex
2.92 +0.8 3.74 perf-profile.calltrace.cycles-pp.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait.do_futex
68.21 +1.1 69.32 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
65.61 +1.1 66.75 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
49.34 +1.8 51.14 perf-profile.calltrace.cycles-pp.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
45.75 +2.0 47.78 perf-profile.calltrace.cycles-pp.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
43.36 +2.1 45.44 perf-profile.calltrace.cycles-pp.futex_wait.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe
3.80 ± 2% +2.1 5.94 ± 2% perf-profile.calltrace.cycles-pp.futex_hash.futex_wait_setup.__futex_wait.futex_wait.do_futex
38.92 +2.3 41.20 perf-profile.calltrace.cycles-pp.__futex_wait.futex_wait.do_futex.__x64_sys_futex.do_syscall_64
29.49 +2.6 32.08 perf-profile.calltrace.cycles-pp.futex_wait_setup.__futex_wait.futex_wait.do_futex.__x64_sys_futex
0.00 +4.5 4.50 perf-profile.calltrace.cycles-pp.__futex_hash.futex_hash.futex_wait_setup.__futex_wait.futex_wait
3.59 ± 2% -0.6 2.99 perf-profile.children.cycles-pp.futex_q_unlock
10.00 -0.6 9.43 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
16.65 -0.5 16.17 perf-profile.children.cycles-pp.entry_SYSCALL_64
6.34 -0.3 6.08 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
2.41 -0.2 2.23 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
1.44 -0.1 1.33 perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
1.98 -0.1 1.89 perf-profile.children.cycles-pp.syscall_return_via_sysret
1.51 -0.1 1.43 perf-profile.children.cycles-pp.testcase
1.41 -0.1 1.36 perf-profile.children.cycles-pp.futex_hash_put
2.34 -0.1 2.28 perf-profile.children.cycles-pp.x64_sys_call
0.79 -0.0 0.74 perf-profile.children.cycles-pp.futex_setup_timer
0.10 ± 3% +0.0 0.12 ± 4% perf-profile.children.cycles-pp.ktime_get_update_offsets_now
0.16 ± 3% +0.0 0.17 ± 2% perf-profile.children.cycles-pp.sched_tick
0.14 ± 9% +0.1 0.20 ± 16% perf-profile.children.cycles-pp.ktime_get
0.14 ± 11% +0.1 0.20 ± 14% perf-profile.children.cycles-pp.clockevents_program_event
0.34 ± 9% +0.1 0.42 ± 12% perf-profile.children.cycles-pp.update_process_times
0.42 ± 8% +0.1 0.52 ± 12% perf-profile.children.cycles-pp.__hrtimer_run_queues
0.42 ± 9% +0.1 0.51 ± 13% perf-profile.children.cycles-pp.tick_nohz_handler
0.70 ± 7% +0.2 0.86 ± 10% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt
0.74 ± 6% +0.2 0.90 ± 10% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt
0.68 ± 7% +0.2 0.84 ± 10% perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt
0.68 ± 7% +0.2 0.84 ± 10% perf-profile.children.cycles-pp.hrtimer_interrupt
2.34 +0.4 2.78 perf-profile.children.cycles-pp.get_futex_key
3.07 +0.8 3.91 perf-profile.children.cycles-pp.futex_q_lock
66.52 +1.1 67.64 perf-profile.children.cycles-pp.do_syscall_64
68.64 +1.1 69.76 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
49.87 +1.8 51.64 perf-profile.children.cycles-pp.__x64_sys_futex
46.54 +2.0 48.55 perf-profile.children.cycles-pp.do_futex
43.64 +2.1 45.70 perf-profile.children.cycles-pp.futex_wait
39.38 +2.3 41.65 perf-profile.children.cycles-pp.__futex_wait
3.95 ± 2% +2.4 6.32 ± 2% perf-profile.children.cycles-pp.futex_hash
31.16 +2.6 33.80 perf-profile.children.cycles-pp.futex_wait_setup
0.00 +4.7 4.74 perf-profile.children.cycles-pp.__futex_hash
3.76 ± 2% -2.2 1.56 ± 9% perf-profile.self.cycles-pp.futex_hash
3.36 ± 2% -0.6 2.80 ± 2% perf-profile.self.cycles-pp.futex_q_unlock
8.55 -0.5 8.08 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
8.11 -0.4 7.75 perf-profile.self.cycles-pp.__futex_wait
15.92 -0.4 15.56 perf-profile.self.cycles-pp.syscall
14.12 -0.3 13.79 perf-profile.self.cycles-pp.futex_wait_setup
4.08 -0.3 3.80 perf-profile.self.cycles-pp.entry_SYSCALL_64
6.12 -0.2 5.88 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
3.32 -0.2 3.09 perf-profile.self.cycles-pp.__x64_sys_futex
3.46 -0.2 3.29 perf-profile.self.cycles-pp.futex_wait
4.49 -0.1 4.38 perf-profile.self.cycles-pp.do_syscall_64
1.98 -0.1 1.89 perf-profile.self.cycles-pp.syscall_return_via_sysret
1.42 -0.1 1.33 perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
1.31 -0.1 1.23 perf-profile.self.cycles-pp.testcase
1.14 -0.1 1.07 perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
3.15 -0.1 3.08 perf-profile.self.cycles-pp.do_futex
2.07 -0.1 2.02 perf-profile.self.cycles-pp.x64_sys_call
0.81 -0.0 0.76 perf-profile.self.cycles-pp.futex_hash_put
0.53 -0.0 0.50 perf-profile.self.cycles-pp.futex_setup_timer
0.10 +0.0 0.12 ± 4% perf-profile.self.cycles-pp.ktime_get_update_offsets_now
0.14 ± 10% +0.1 0.19 ± 16% perf-profile.self.cycles-pp.ktime_get
3.69 +0.1 3.74 perf-profile.self.cycles-pp._raw_spin_lock
2.16 +0.4 2.60 perf-profile.self.cycles-pp.get_futex_key
2.72 +0.7 3.42 perf-profile.self.cycles-pp.futex_q_lock
0.00 +4.5 4.52 perf-profile.self.cycles-pp.__futex_hash
***************************************************************************************************
lkp-srf-2sp1: 256 threads 2 sockets GENUINE INTEL(R) XEON(R) (Sierra Forest) with 128G memory
=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
gcc-12/performance/x86_64-rhel-9.4/thread/100%/debian-12-x86_64-20240206.cgz/lkp-srf-2sp1/futex2/will-it-scale
commit:
63e8595c06 ("futex: Allow to make the private hash immutable")
cec199c5e3 ("futex: Implement FUTEX2_NUMA")
63e8595c060a1fef cec199c5e39bde7191a08087cc3
---------------- ---------------------------
%stddev %change %stddev
\ | \
41.17 ± 8% -21.1% 32.50 ± 15% perf-sched.wait_and_delay.count.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
22531 ± 3% +13.6% 25603 ± 18% proc-vmstat.numa_pages_migrated
95467 ± 22% +48.6% 141903 ± 19% proc-vmstat.numa_pte_updates
22531 ± 3% +13.6% 25603 ± 18% proc-vmstat.pgmigrate_success
9.212e+08 -3.4% 8.901e+08 will-it-scale.256.threads
3598280 -3.4% 3477060 will-it-scale.per_thread_ops
9.212e+08 -3.4% 8.901e+08 will-it-scale.workload
7870684 ± 34% +203.6% 23897639 ± 30% perf-stat.i.branch-misses
41.81 ± 55% -20.4 21.40 ± 90% perf-stat.i.cache-miss-rate%
0.00 ± 34% +0.0 0.01 ± 30% perf-stat.overall.branch-miss-rate%
33.72 ± 44% -15.4 18.36 ± 69% perf-stat.overall.cache-miss-rate%
364549 +3.4% 376857 perf-stat.overall.path-length
7813564 ± 34% +204.1% 23764749 ± 30% perf-stat.ps.branch-misses
21.56 -2.4 19.17 perf-profile.calltrace.cycles-pp.get_user_pages_fast.get_futex_key.futex_wait_setup.__futex_wait.futex_wait
20.55 -2.3 18.23 perf-profile.calltrace.cycles-pp.gup_fast_fallback.get_user_pages_fast.get_futex_key.futex_wait_setup.__futex_wait
18.89 -1.6 17.27 perf-profile.calltrace.cycles-pp.gup_fast.gup_fast_fallback.get_user_pages_fast.get_futex_key.futex_wait_setup
16.79 -1.2 15.55 perf-profile.calltrace.cycles-pp.gup_fast_pgd_range.gup_fast.gup_fast_fallback.get_user_pages_fast.get_futex_key
23.20 -0.8 22.41 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.syscall
12.14 -0.6 11.58 perf-profile.calltrace.cycles-pp.gup_fast_pte_range.gup_fast_pgd_range.gup_fast.gup_fast_fallback.get_user_pages_fast
2.72 ± 2% -0.2 2.56 perf-profile.calltrace.cycles-pp.futex_q_unlock.futex_wait_setup.__futex_wait.futex_wait.do_futex
4.52 -0.1 4.37 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
2.91 ± 2% -0.1 2.76 ± 2% perf-profile.calltrace.cycles-pp._raw_spin_lock.futex_wait_setup.__futex_wait.futex_wait.do_futex
3.20 -0.1 3.10 perf-profile.calltrace.cycles-pp.try_get_folio.gup_fast_pte_range.gup_fast_pgd_range.gup_fast.gup_fast_fallback
0.88 -0.1 0.78 perf-profile.calltrace.cycles-pp.___pte_offset_map.gup_fast_pte_range.gup_fast_pgd_range.gup_fast.gup_fast_fallback
2.98 -0.1 2.88 perf-profile.calltrace.cycles-pp.entry_SYSRETQ_unsafe_stack.syscall
2.58 -0.1 2.50 perf-profile.calltrace.cycles-pp.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait.do_futex
1.80 -0.1 1.74 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.syscall
26.00 +0.4 26.36 perf-profile.calltrace.cycles-pp.get_futex_key.futex_wait_setup.__futex_wait.futex_wait.do_futex
65.92 +1.1 67.00 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
64.16 +1.1 65.30 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
57.75 +1.4 59.10 perf-profile.calltrace.cycles-pp.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
56.92 +1.4 58.29 perf-profile.calltrace.cycles-pp.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
56.20 +1.4 57.60 perf-profile.calltrace.cycles-pp.futex_wait.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe
54.70 +1.5 56.16 perf-profile.calltrace.cycles-pp.__futex_wait.futex_wait.do_futex.__x64_sys_futex.do_syscall_64
46.65 +1.6 48.28 perf-profile.calltrace.cycles-pp.futex_wait_setup.__futex_wait.futex_wait.do_futex.__x64_sys_futex
1.72 ± 7% +1.8 3.55 ± 3% perf-profile.calltrace.cycles-pp.futex_hash.futex_wait_setup.__futex_wait.futex_wait.do_futex
0.00 +3.0 3.01 perf-profile.calltrace.cycles-pp.__futex_hash.futex_hash.futex_wait_setup.__futex_wait.futex_wait
21.79 -2.6 19.24 perf-profile.children.cycles-pp.get_user_pages_fast
20.62 -2.3 18.30 perf-profile.children.cycles-pp.gup_fast_fallback
18.96 -1.6 17.34 perf-profile.children.cycles-pp.gup_fast
16.82 -1.2 15.58 perf-profile.children.cycles-pp.gup_fast_pgd_range
12.21 -0.5 11.66 perf-profile.children.cycles-pp.gup_fast_pte_range
15.66 -0.5 15.13 perf-profile.children.cycles-pp.entry_SYSCALL_64
12.01 -0.4 11.62 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
2.76 ± 2% -0.2 2.60 perf-profile.children.cycles-pp.futex_q_unlock
4.59 -0.2 4.43 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
2.95 ± 2% -0.1 2.80 ± 2% perf-profile.children.cycles-pp._raw_spin_lock
0.59 -0.1 0.47 perf-profile.children.cycles-pp.is_valid_gup_args
0.91 -0.1 0.80 perf-profile.children.cycles-pp.___pte_offset_map
3.24 -0.1 3.13 perf-profile.children.cycles-pp.try_get_folio
2.62 -0.1 2.53 perf-profile.children.cycles-pp.futex_q_lock
2.03 -0.1 1.96 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
0.41 -0.0 0.39 perf-profile.children.cycles-pp.try_grab_folio_fast
0.50 -0.0 0.49 perf-profile.children.cycles-pp.testcase
0.49 -0.0 0.47 perf-profile.children.cycles-pp.x64_sys_call
0.49 -0.0 0.47 perf-profile.children.cycles-pp.syscall_return_via_sysret
0.15 -0.0 0.14 perf-profile.children.cycles-pp.futex_setup_timer
0.09 +0.0 0.10 ± 3% perf-profile.children.cycles-pp.__sysvec_thermal
0.09 +0.0 0.10 ± 3% perf-profile.children.cycles-pp.intel_thermal_interrupt
26.06 +0.4 26.43 perf-profile.children.cycles-pp.get_futex_key
66.09 +1.1 67.16 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
64.36 +1.1 65.48 perf-profile.children.cycles-pp.do_syscall_64
57.75 +1.4 59.10 perf-profile.children.cycles-pp.__x64_sys_futex
56.92 +1.4 58.29 perf-profile.children.cycles-pp.do_futex
56.22 +1.4 57.62 perf-profile.children.cycles-pp.futex_wait
55.22 +1.4 56.67 perf-profile.children.cycles-pp.__futex_wait
46.26 +1.7 48.00 perf-profile.children.cycles-pp.futex_wait_setup
1.75 ± 7% +1.8 3.57 ± 3% perf-profile.children.cycles-pp.futex_hash
0.00 +3.0 3.04 perf-profile.children.cycles-pp.__futex_hash
1.71 ± 7% -1.2 0.50 ± 23% perf-profile.self.cycles-pp.futex_hash
4.58 -0.7 3.88 ± 2% perf-profile.self.cycles-pp.gup_fast_pgd_range
1.49 -0.5 0.98 ± 2% perf-profile.self.cycles-pp.gup_fast_fallback
11.97 -0.4 11.59 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
2.07 -0.4 1.69 perf-profile.self.cycles-pp.gup_fast
11.78 -0.3 11.46 perf-profile.self.cycles-pp.syscall
9.43 -0.3 9.12 perf-profile.self.cycles-pp.__futex_wait
0.76 -0.3 0.47 perf-profile.self.cycles-pp.get_user_pages_fast
7.34 -0.3 7.08 perf-profile.self.cycles-pp.gup_fast_pte_range
7.64 -0.3 7.38 perf-profile.self.cycles-pp.entry_SYSCALL_64
2.72 ± 2% -0.2 2.56 perf-profile.self.cycles-pp.futex_q_unlock
0.58 -0.1 0.44 perf-profile.self.cycles-pp.is_valid_gup_args
4.20 -0.1 4.06 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
0.88 -0.1 0.76 perf-profile.self.cycles-pp.___pte_offset_map
3.23 -0.1 3.11 perf-profile.self.cycles-pp.try_get_folio
2.61 -0.1 2.52 perf-profile.self.cycles-pp.futex_q_lock
1.53 -0.1 1.48 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
1.54 -0.1 1.49 perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
1.39 -0.0 1.35 perf-profile.self.cycles-pp.do_syscall_64
0.41 -0.0 0.37 perf-profile.self.cycles-pp.try_grab_folio_fast
0.86 -0.0 0.83 perf-profile.self.cycles-pp.futex_wait
0.83 -0.0 0.80 perf-profile.self.cycles-pp.__x64_sys_futex
0.70 -0.0 0.67 perf-profile.self.cycles-pp.do_futex
0.45 -0.0 0.44 perf-profile.self.cycles-pp.x64_sys_call
0.47 -0.0 0.45 perf-profile.self.cycles-pp.testcase
0.45 -0.0 0.44 perf-profile.self.cycles-pp.syscall_return_via_sysret
4.24 +2.9 7.17 perf-profile.self.cycles-pp.get_futex_key
0.00 +3.0 3.03 perf-profile.self.cycles-pp.__futex_hash
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.
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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