* [vbabka:b4/sheaves-for-all-rebased] [slab] 02b7b4409e: stress-ng.timerfd.ops_per_sec 12.8% regression
@ 2026-01-13 14:20 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-01-13 14:20 UTC (permalink / raw)
To: Vlastimil Babka; +Cc: oe-lkp, lkp, linux-mm, oliver.sang
Hello,
kernel test robot noticed a 12.8% regression of stress-ng.timerfd.ops_per_sec on:
commit: 02b7b4409e4450b06d3c93a651552d939a4685c7 ("slab: add optimized sheaf refill from partial list")
https://git.kernel.org/cgit/linux/kernel/git/vbabka/linux.git b4/sheaves-for-all-rebased
testcase: stress-ng
config: x86_64-rhel-9.4
compiler: gcc-14
test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 512G memory
parameters:
nr_threads: 100%
testtime: 60s
test: timerfd
cpufreq_governor: performance
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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202601132233.e3dcb51b-lkp@intel.com
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260113/202601132233.e3dcb51b-lkp@intel.com
=========================================================================================
compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
gcc-14/performance/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-spr-2sp4/timerfd/stress-ng/60s
commit:
94b4dbf98e ("slab: handle kmalloc sheaves bootstrap")
02b7b4409e ("slab: add optimized sheaf refill from partial list")
94b4dbf98e906cf5 02b7b4409e4450b06d3c93a6515
---------------- ---------------------------
%stddev %change %stddev
\ | \
155203 +26.5% 196278 ± 17% numa-vmstat.node1.nr_shmem
19549 ± 71% +370.2% 91924 ± 86% numa-meminfo.node1.AnonHugePages
620646 +26.7% 786626 ± 17% numa-meminfo.node1.Shmem
23.47 ± 4% -54.6% 10.65 ± 14% vmstat.cpu.us
88793547 -14.8% 75691766 ± 15% vmstat.system.in
1358038 +16.5% 1581709 ± 9% meminfo.Active
1358021 +16.5% 1581692 ± 9% meminfo.Active(anon)
629761 +25.7% 791750 ± 17% meminfo.Shmem
81033 +14.9% 93133 ± 10% sched_debug.cpu.clock_task.avg
84145 +14.0% 95957 ± 9% sched_debug.cpu.clock_task.max
66185 ± 2% +17.7% 77887 ± 11% sched_debug.cpu.clock_task.min
2.95 +13.1 16.07 ± 83% mpstat.cpu.all.idle%
21.03 -4.5 16.53 ± 15% mpstat.cpu.all.irq%
0.01 ± 6% -0.0 0.01 ± 16% mpstat.cpu.all.soft%
24.23 ± 4% -13.2 10.99 ± 14% mpstat.cpu.all.usr%
109.83 ± 35% +273.4% 410.17 ± 19% perf-c2c.DRAM.local
834.33 ± 38% +1072.6% 9783 ± 24% perf-c2c.DRAM.remote
1954 ± 28% +6623.4% 131419 ± 3% perf-c2c.HITM.local
521.83 ± 10% +317.0% 2176 ± 15% perf-c2c.HITM.remote
2476 ± 21% +5294.5% 133595 ± 3% perf-c2c.HITM.total
17272 +2.7% 17737 stress-ng.time.percent_of_cpu_this_job_got
7169 ± 2% +26.1% 9038 stress-ng.time.system_time
3272 ± 4% -48.6% 1681 ± 2% stress-ng.time.user_time
2.158e+10 -12.8% 1.883e+10 stress-ng.timerfd.ops
3.589e+08 -12.8% 3.131e+08 stress-ng.timerfd.ops_per_sec
2.28 ± 9% +549.0% 14.78 ± 85% turbostat.CPU%c6
0.89 -11.9% 0.79 turbostat.IPC
124.78 ± 22% -36.7 88.12 ± 17% turbostat.PKG_%
64.83 -9.8% 58.50 ± 5% turbostat.PkgTmp
21.72 +11.5% 24.22 turbostat.RAMWatt
339527 +16.5% 395563 ± 9% proc-vmstat.nr_active_anon
1083065 +3.7% 1123590 ± 3% proc-vmstat.nr_file_pages
43396 -3.2% 41987 proc-vmstat.nr_kernel_stack
157497 +25.8% 198083 ± 17% proc-vmstat.nr_shmem
157752 -8.7% 143960 proc-vmstat.nr_slab_unreclaimable
339527 +16.5% 395563 ± 9% proc-vmstat.nr_zone_active_anon
1276039 +2.8% 1312010 proc-vmstat.numa_hit
1044667 +3.4% 1080685 proc-vmstat.numa_local
1414047 +4.6% 1478701 ± 2% proc-vmstat.pgalloc_normal
608043 +5.3% 640138 ± 3% proc-vmstat.pgfault
816690 ± 2% +13.1% 923454 ± 5% proc-vmstat.pgfree
0.03 ± 13% +763.9% 0.22 ± 51% perf-stat.i.MPKI
1.122e+11 -24.0% 8.53e+10 ± 15% perf-stat.i.branch-instructions
0.17 ± 4% +0.1 0.23 ± 13% perf-stat.i.branch-miss-rate%
12.67 ± 43% -8.2 4.49 ± 24% perf-stat.i.cache-miss-rate%
4380117 ± 45% +1017.9% 48964684 ± 33% perf-stat.i.cache-misses
30814202 ± 15% +3647.0% 1.155e+09 ± 21% perf-stat.i.cache-references
1.10 +79.2% 1.97 ± 39% perf-stat.i.cpi
385300 ± 32% -95.6% 16830 ± 23% perf-stat.i.cycles-between-cache-misses
5.882e+11 -23.8% 4.482e+11 ± 16% perf-stat.i.instructions
0.92 -15.6% 0.77 ± 4% perf-stat.i.ipc
0.01 ± 45% +1372.4% 0.11 ± 28% perf-stat.overall.MPKI
0.13 +0.0 0.15 ± 9% perf-stat.overall.branch-miss-rate%
14.00 ± 35% -9.7 4.29 ± 26% perf-stat.overall.cache-miss-rate%
1.08 +14.0% 1.23 perf-stat.overall.cpi
163751 ± 25% -92.6% 12108 ± 26% perf-stat.overall.cycles-between-cache-misses
0.93 -12.2% 0.81 perf-stat.overall.ipc
1.104e+11 -23.8% 8.413e+10 ± 15% perf-stat.ps.branch-instructions
4318635 ± 46% +1022.5% 48476620 ± 32% perf-stat.ps.cache-misses
30464543 ± 15% +3637.7% 1.139e+09 ± 21% perf-stat.ps.cache-references
5.786e+11 -23.6% 4.421e+11 ± 15% perf-stat.ps.instructions
3.562e+13 -11.3% 3.16e+13 perf-stat.total.instructions
21.54 ± 17% -12.0 9.51 ± 5% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.do_syscall_64.entry_SYSCALL_64_after_hwframe
11.08 ± 17% -6.3 4.77 ± 5% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.do_syscall_64.entry_SYSCALL_64_after_hwframe
9.98 ± 13% -5.7 4.26 ± 3% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt
9.80 ± 17% -5.6 4.19 ± 5% perf-profile.calltrace.cycles-pp.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.do_syscall_64.entry_SYSCALL_64_after_hwframe
8.15 ± 17% -4.7 3.46 ± 5% perf-profile.calltrace.cycles-pp.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.do_syscall_64
7.26 ± 14% -4.2 3.06 ± 3% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
6.48 ± 14% -3.8 2.72 ± 3% perf-profile.calltrace.cycles-pp.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
5.41 ± 14% -3.1 2.26 ± 3% perf-profile.calltrace.cycles-pp.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
4.33 -1.0 3.34 perf-profile.calltrace.cycles-pp.clockevents_program_event.hrtimer_start_range_ns.timerfd_read_iter.vfs_read.ksys_read
7.19 ± 3% -1.0 6.21 perf-profile.calltrace.cycles-pp.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
1.70 ± 15% -0.9 0.76 ± 2% perf-profile.calltrace.cycles-pp.sync_regs.asm_sysvec_apic_timer_interrupt
3.34 -0.8 2.55 perf-profile.calltrace.cycles-pp.lapic_next_deadline.clockevents_program_event.hrtimer_start_range_ns.timerfd_read_iter.vfs_read
1.84 ± 3% -0.8 1.08 ± 2% perf-profile.calltrace.cycles-pp.stress_timerfd
1.19 ± 16% -0.7 0.53 ± 4% perf-profile.calltrace.cycles-pp.native_apic_msr_eoi.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.do_syscall_64
4.96 ± 2% -0.7 4.31 perf-profile.calltrace.cycles-pp.clockevents_program_event.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
2.36 ± 3% -0.6 1.78 perf-profile.calltrace.cycles-pp.timerfd_tmrproc.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt
2.32 -0.5 1.85 ± 2% perf-profile.calltrace.cycles-pp.switch_hrtimer_base.hrtimer_start_range_ns.timerfd_read_iter.vfs_read.ksys_read
2.31 -0.4 1.88 perf-profile.calltrace.cycles-pp.arch_exit_to_user_mode_prepare.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.63 -0.3 1.36 perf-profile.calltrace.cycles-pp.timerqueue_add.hrtimer_start_range_ns.timerfd_read_iter.vfs_read.ksys_read
0.79 ± 5% -0.2 0.59 ± 2% perf-profile.calltrace.cycles-pp.timerqueue_del.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt
0.85 ± 7% -0.2 0.65 ± 2% perf-profile.calltrace.cycles-pp.x64_sys_call.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.98 -0.2 0.79 perf-profile.calltrace.cycles-pp.get_nohz_timer_target.switch_hrtimer_base.hrtimer_start_range_ns.timerfd_read_iter.vfs_read
1.05 -0.2 0.88 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64
1.45 -0.2 1.28 perf-profile.calltrace.cycles-pp.hrtimer_forward.timerfd_read_iter.vfs_read.ksys_read.do_syscall_64
1.00 -0.2 0.84 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack
1.67 -0.2 1.51 perf-profile.calltrace.cycles-pp.rw_verify_area.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.71 ± 6% -0.1 0.57 ± 2% perf-profile.calltrace.cycles-pp._raw_spin_lock_irq.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt
0.66 -0.1 0.54 perf-profile.calltrace.cycles-pp.rb_insert_color.timerqueue_add.hrtimer_start_range_ns.timerfd_read_iter.vfs_read
3.12 ± 2% -0.1 3.00 perf-profile.calltrace.cycles-pp.lapic_next_deadline.clockevents_program_event.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt
0.70 -0.1 0.60 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret
0.70 -0.1 0.63 ± 2% perf-profile.calltrace.cycles-pp.security_file_permission.rw_verify_area.vfs_read.ksys_read.do_syscall_64
1.89 +0.0 1.94 perf-profile.calltrace.cycles-pp.read_tsc.ktime_get.timerfd_read_iter.vfs_read.ksys_read
1.61 ± 2% +0.5 2.06 ± 9% perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.hrtimer_start_range_ns.timerfd_read_iter.vfs_read.ksys_read
0.00 +0.6 0.60 perf-profile.calltrace.cycles-pp.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.timerfd_read_iter.vfs_read
0.00 +1.1 1.09 ± 2% perf-profile.calltrace.cycles-pp.native_apic_msr_eoi.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.timerfd_read_iter
0.00 +1.5 1.46 ± 3% perf-profile.calltrace.cycles-pp.hrtimer_cb_get_time.timerfd_read_iter.vfs_read.ksys_read.do_syscall_64
2.04 ± 5% +2.9 4.89 ± 5% perf-profile.calltrace.cycles-pp._raw_spin_lock_irq.timerfd_read_iter.vfs_read.ksys_read.do_syscall_64
5.28 +3.4 8.71 ± 3% perf-profile.calltrace.cycles-pp.do_sys_poll.__x64_sys_poll.do_syscall_64.entry_SYSCALL_64_after_hwframe
5.29 +3.4 8.71 ± 3% perf-profile.calltrace.cycles-pp.__x64_sys_poll.do_syscall_64.entry_SYSCALL_64_after_hwframe
4.86 +3.5 8.36 ± 4% perf-profile.calltrace.cycles-pp.do_poll.do_sys_poll.__x64_sys_poll.do_syscall_64.entry_SYSCALL_64_after_hwframe
3.18 +3.7 6.90 ± 5% perf-profile.calltrace.cycles-pp.timerfd_poll.do_poll.do_sys_poll.__x64_sys_poll.do_syscall_64
2.04 ± 2% +3.9 5.97 ± 6% perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.timerfd_poll.do_poll.do_sys_poll.__x64_sys_poll
1.87 ± 7% +5.5 7.40 ± 2% perf-profile.calltrace.cycles-pp.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.timerfd_read_iter
2.22 ± 7% +6.7 8.92 ± 2% perf-profile.calltrace.cycles-pp.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.timerfd_read_iter.vfs_read
2.50 ± 7% +7.6 10.12 ± 2% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.timerfd_read_iter.vfs_read.ksys_read
77.88 ± 2% +9.7 87.54 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe
74.44 +11.1 85.52 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe
4.72 ± 8% +15.2 19.95 ± 2% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.timerfd_read_iter.vfs_read.ksys_read.do_syscall_64
33.41 ± 5% +17.7 51.08 perf-profile.calltrace.cycles-pp.timerfd_read_iter.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe
45.53 ± 4% +18.8 64.36 perf-profile.calltrace.cycles-pp.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe
39.96 ± 5% +18.9 58.84 perf-profile.calltrace.cycles-pp.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe
37.47 -3.4 34.09 perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt
26.04 -3.1 22.93 perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt
23.07 -2.9 20.16 perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt
19.37 -2.6 16.81 perf-profile.children.cycles-pp.hrtimer_interrupt
9.23 -1.6 7.59 perf-profile.children.cycles-pp.__hrtimer_run_queues
10.48 -1.5 8.94 perf-profile.children.cycles-pp.clockevents_program_event
8.20 -1.3 6.90 perf-profile.children.cycles-pp.lapic_next_deadline
1.97 ± 12% -1.1 0.86 ± 2% perf-profile.children.cycles-pp.sync_regs
6.85 ± 3% -1.0 5.82 perf-profile.children.cycles-pp.native_irq_return_iret
2.31 ± 4% -1.0 1.32 ± 2% perf-profile.children.cycles-pp.stress_timerfd
1.29 ± 4% -0.6 0.66 ± 3% perf-profile.children.cycles-pp.read
3.61 -0.6 3.00 perf-profile.children.cycles-pp.timerfd_tmrproc
3.09 -0.5 2.54 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
2.59 -0.5 2.06 perf-profile.children.cycles-pp.arch_exit_to_user_mode_prepare
2.51 -0.5 2.00 perf-profile.children.cycles-pp.switch_hrtimer_base
2.09 -0.5 1.61 perf-profile.children.cycles-pp.timerqueue_del
1.97 -0.4 1.57 perf-profile.children.cycles-pp._raw_spin_unlock_irqrestore
3.38 -0.3 3.06 perf-profile.children.cycles-pp.native_apic_msr_eoi
1.81 -0.3 1.51 perf-profile.children.cycles-pp.timerqueue_add
1.17 -0.3 0.87 perf-profile.children.cycles-pp.rb_erase
1.46 -0.2 1.21 perf-profile.children.cycles-pp.entry_SYSCALL_64
0.53 ± 3% -0.2 0.30 ± 3% perf-profile.children.cycles-pp.read@plt
1.05 ± 7% -0.2 0.82 perf-profile.children.cycles-pp.x64_sys_call
1.17 -0.2 0.94 perf-profile.children.cycles-pp.get_nohz_timer_target
4.34 -0.2 4.13 perf-profile.children.cycles-pp.read_tsc
4.72 -0.2 4.52 perf-profile.children.cycles-pp.ktime_get
1.54 -0.2 1.36 perf-profile.children.cycles-pp.hrtimer_forward
2.00 -0.2 1.82 perf-profile.children.cycles-pp.rw_verify_area
1.03 -0.2 0.86 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
0.72 -0.1 0.57 perf-profile.children.cycles-pp.__wake_up_common
1.98 -0.1 1.83 perf-profile.children.cycles-pp.irqtime_account_irq
0.75 -0.1 0.62 perf-profile.children.cycles-pp.rb_insert_color
1.59 -0.1 1.46 perf-profile.children.cycles-pp.__irq_exit_rcu
0.65 -0.1 0.52 perf-profile.children.cycles-pp.enqueue_hrtimer
1.46 -0.1 1.34 perf-profile.children.cycles-pp.ktime_get_update_offsets_now
0.78 -0.1 0.66 ± 2% perf-profile.children.cycles-pp.syscall_return_via_sysret
0.99 -0.1 0.87 perf-profile.children.cycles-pp.hrtimer_update_next_event
0.34 ± 5% -0.1 0.23 ± 2% perf-profile.children.cycles-pp.irqentry_exit
1.46 -0.1 1.37 perf-profile.children.cycles-pp.sched_clock_cpu
0.47 -0.1 0.38 perf-profile.children.cycles-pp.rb_next
0.69 -0.1 0.60 ± 2% perf-profile.children.cycles-pp.__hrtimer_next_event_base
0.40 ± 3% -0.1 0.32 ± 2% perf-profile.children.cycles-pp.__x64_sys_read
0.40 -0.1 0.32 ± 2% perf-profile.children.cycles-pp.idle_cpu
0.78 -0.1 0.70 perf-profile.children.cycles-pp.error_entry
1.23 -0.1 1.17 perf-profile.children.cycles-pp.sched_clock
0.84 -0.1 0.78 perf-profile.children.cycles-pp.security_file_permission
1.08 -0.0 1.03 perf-profile.children.cycles-pp.native_sched_clock
0.25 -0.0 0.20 ± 2% perf-profile.children.cycles-pp.__wake_up_locked_key
0.18 ± 2% -0.0 0.14 ± 3% perf-profile.children.cycles-pp.timerfd_settime
0.29 -0.0 0.26 perf-profile.children.cycles-pp.tick_program_event
0.15 ± 2% -0.0 0.12 ± 3% perf-profile.children.cycles-pp.hrtimer_reprogram
0.11 ± 4% -0.0 0.08 perf-profile.children.cycles-pp.timerfd_gettime
0.07 ± 5% -0.0 0.05 perf-profile.children.cycles-pp.__x64_sys_timerfd_settime
0.08 -0.0 0.07 ± 7% perf-profile.children.cycles-pp._copy_from_user
0.13 ± 3% -0.0 0.12 perf-profile.children.cycles-pp.sched_core_idle_cpu
0.06 -0.0 0.05 perf-profile.children.cycles-pp.error_return
0.32 ± 2% +1.2 1.53 ± 3% perf-profile.children.cycles-pp.hrtimer_cb_get_time
3.72 ± 2% +2.6 6.30 ± 3% perf-profile.children.cycles-pp._raw_spin_lock_irq
5.29 +3.4 8.72 ± 3% perf-profile.children.cycles-pp.__x64_sys_poll
5.29 +3.4 8.72 ± 3% perf-profile.children.cycles-pp.do_sys_poll
5.05 +3.5 8.52 ± 4% perf-profile.children.cycles-pp.do_poll
3.43 +3.7 7.10 ± 5% perf-profile.children.cycles-pp.timerfd_poll
6.16 +4.1 10.27 ± 5% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
78.28 ± 2% +9.6 87.89 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
77.33 ± 2% +9.8 87.13 perf-profile.children.cycles-pp.do_syscall_64
46.08 ± 4% +18.8 64.88 perf-profile.children.cycles-pp.ksys_read
40.53 ± 5% +18.9 59.46 perf-profile.children.cycles-pp.vfs_read
34.46 ± 5% +19.4 53.88 perf-profile.children.cycles-pp.timerfd_read_iter
7.50 ± 11% -3.4 4.14 ± 3% perf-profile.self.cycles-pp.do_syscall_64
8.16 -1.3 6.88 perf-profile.self.cycles-pp.lapic_next_deadline
1.95 ± 12% -1.1 0.85 ± 2% perf-profile.self.cycles-pp.sync_regs
6.85 ± 3% -1.0 5.81 perf-profile.self.cycles-pp.native_irq_return_iret
5.36 ± 8% -0.6 4.74 perf-profile.self.cycles-pp._copy_to_iter
3.01 -0.5 2.49 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
2.40 -0.5 1.92 perf-profile.self.cycles-pp.arch_exit_to_user_mode_prepare
3.34 ± 2% -0.5 2.88 ± 2% perf-profile.self.cycles-pp.vfs_read
1.23 ± 2% -0.4 0.86 ± 2% perf-profile.self.cycles-pp.stress_timerfd
3.33 -0.3 3.02 perf-profile.self.cycles-pp.native_apic_msr_eoi
1.48 -0.3 1.19 perf-profile.self.cycles-pp._raw_spin_unlock_irqrestore
1.70 -0.3 1.42 perf-profile.self.cycles-pp.__hrtimer_run_queues
0.99 -0.3 0.73 ± 2% perf-profile.self.cycles-pp.rb_erase
1.23 -0.3 0.98 perf-profile.self.cycles-pp.switch_hrtimer_base
1.42 -0.2 1.18 perf-profile.self.cycles-pp.entry_SYSCALL_64
2.44 ± 4% -0.2 2.22 ± 4% perf-profile.self.cycles-pp.fdget_pos
1.05 -0.2 0.84 ± 2% perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.56 ± 2% -0.2 0.36 ± 2% perf-profile.self.cycles-pp.read
4.08 -0.2 3.90 perf-profile.self.cycles-pp.read_tsc
0.94 -0.2 0.75 perf-profile.self.cycles-pp.do_poll
1.10 -0.2 0.92 perf-profile.self.cycles-pp.rw_verify_area
1.40 -0.2 1.22 perf-profile.self.cycles-pp.hrtimer_forward
0.84 -0.2 0.67 ± 2% perf-profile.self.cycles-pp.timerfd_tmrproc
1.07 -0.2 0.90 perf-profile.self.cycles-pp.timerqueue_add
0.79 -0.2 0.63 perf-profile.self.cycles-pp.timerfd_poll
0.78 -0.2 0.62 perf-profile.self.cycles-pp.get_nohz_timer_target
0.65 ± 3% -0.1 0.51 ± 2% perf-profile.self.cycles-pp.x64_sys_call
0.63 -0.1 0.50 ± 2% perf-profile.self.cycles-pp.timerqueue_del
0.78 -0.1 0.66 ± 2% perf-profile.self.cycles-pp.syscall_return_via_sysret
0.60 -0.1 0.48 perf-profile.self.cycles-pp.__wake_up_common
0.65 -0.1 0.53 perf-profile.self.cycles-pp.rb_insert_color
0.68 -0.1 0.56 perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
0.56 -0.1 0.45 perf-profile.self.cycles-pp.enqueue_hrtimer
0.80 -0.1 0.72 perf-profile.self.cycles-pp.hrtimer_interrupt
0.62 -0.1 0.55 perf-profile.self.cycles-pp.__hrtimer_next_event_base
0.54 -0.1 0.46 perf-profile.self.cycles-pp.security_file_permission
0.19 ± 3% -0.1 0.11 ± 4% perf-profile.self.cycles-pp.read@plt
0.74 -0.1 0.67 perf-profile.self.cycles-pp.error_entry
0.38 -0.1 0.32 perf-profile.self.cycles-pp.rb_next
0.64 -0.1 0.58 perf-profile.self.cycles-pp.clockevents_program_event
0.25 ± 2% -0.1 0.20 ± 2% perf-profile.self.cycles-pp.__x64_sys_read
0.30 -0.1 0.24 ± 2% perf-profile.self.cycles-pp.idle_cpu
0.50 -0.1 0.44 perf-profile.self.cycles-pp.irqtime_account_irq
0.56 -0.1 0.51 perf-profile.self.cycles-pp.asm_sysvec_apic_timer_interrupt
0.33 -0.0 0.29 perf-profile.self.cycles-pp.hrtimer_update_next_event
1.03 -0.0 0.99 perf-profile.self.cycles-pp.native_sched_clock
0.50 -0.0 0.46 perf-profile.self.cycles-pp.ktime_get_update_offsets_now
0.20 -0.0 0.16 ± 2% perf-profile.self.cycles-pp.irqentry_exit
0.38 -0.0 0.34 ± 2% perf-profile.self.cycles-pp.__sysvec_apic_timer_interrupt
0.18 ± 2% -0.0 0.15 ± 3% perf-profile.self.cycles-pp.__wake_up_locked_key
0.17 ± 2% -0.0 0.14 ± 2% perf-profile.self.cycles-pp.do_sys_poll
0.23 -0.0 0.20 perf-profile.self.cycles-pp.sched_clock_cpu
0.24 -0.0 0.21 ± 2% perf-profile.self.cycles-pp.tick_program_event
0.32 ± 2% -0.0 0.30 perf-profile.self.cycles-pp.__irq_exit_rcu
0.13 ± 2% -0.0 0.11 perf-profile.self.cycles-pp.hrtimer_reprogram
0.34 -0.0 0.32 perf-profile.self.cycles-pp.sysvec_apic_timer_interrupt
0.11 ± 3% -0.0 0.10 perf-profile.self.cycles-pp.sched_core_idle_cpu
0.10 -0.0 0.09 perf-profile.self.cycles-pp.sched_clock
2.25 +1.1 3.30 ± 2% perf-profile.self.cycles-pp.hrtimer_start_range_ns
0.24 ± 3% +1.2 1.46 ± 3% perf-profile.self.cycles-pp.hrtimer_cb_get_time
3.42 ± 2% +2.6 6.04 ± 3% perf-profile.self.cycles-pp._raw_spin_lock_irq
5.74 +4.2 9.93 ± 5% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
3.94 ± 3% +6.1 10.07 ± 2% perf-profile.self.cycles-pp.timerfd_read_iter
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
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2026-01-13 14:20 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2026-01-13 14:20 [vbabka:b4/sheaves-for-all-rebased] [slab] 02b7b4409e: stress-ng.timerfd.ops_per_sec 12.8% regression kernel test robot
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox