Re: [linus:master] [maple_tree] 280b792cac: will-it-scale.per_process_ops 6.0% regression
From: Oliver Sang
Date: Thu May 14 2026 - 03:19:03 EST
hi, Liam,
On Wed, May 13, 2026 at 08:16:42PM -0400, Liam R. Howlett wrote:
> On 26/05/13 03:40PM, kernel test robot wrote:
> >
> >
> > Hello,
> >
> > kernel test robot noticed a 6.0% regression of will-it-scale.per_process_ops on:
> >
> >
> > commit: 280b792cac62ddadca2935766ca870b438c86323 ("maple_tree: use maple copy node for mas_wr_split()")
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> >
> > [still regression on linus/master 5d6919055dec134de3c40167a490f33c74c12581]
> > [still regression on linux-next/master e98d21c170b01ddef366f023bbfcf6b31509fa83]
> >
> > testcase: will-it-scale
> > config: x86_64-rhel-9.4
> > compiler: gcc-14
> > test machine: 48 threads 2 sockets Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz (Ivy Bridge-EP) with 64G memory
> > parameters:
> >
> > nr_task: 100%
> > mode: process
> > test: mmap2
> > cpufreq_governor: performance
> >
> >
>
> Thank you for the report.
>
> 48 threads on a 2 socket E5-2697 v2 looks to be 12 cores (24 threads)
> per cpu (so x2), or exactly one mmap2 process per hyperthread.
this is the cpu information:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 46 bits physical, 48 bits virtual
CPU(s): 48
On-line CPU(s) list: 0-47
Thread(s) per core: 2
Core(s) per socket: 12
Socket(s): 2
NUMA node(s): 2
Vendor ID: GenuineIntel
CPU family: 6
Model: 62
Model name: Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz
Stepping: 4
>
> Is this across all process counts and peaks at 48, or just 48?
just 48. the run script is in
https://download.01.org/0day-ci/archive/20260513/202605131554.92e7df6b-lkp@xxxxxxxxx/repro-script
cd /lkp/benchmarks/will-it-scale
python3 ./runtest.py mmap2 295 process 0 0 48
> Is this across many runs?
we run 6 times for both parent and this commit, the data looks stable
11e7f22f5e85058b09ca90e74002a3b82f50e940/matrix.json: "will-it-scale.per_process_ops": [
11e7f22f5e85058b09ca90e74002a3b82f50e940/matrix.json- 143595,
11e7f22f5e85058b09ca90e74002a3b82f50e940/matrix.json- 143474,
11e7f22f5e85058b09ca90e74002a3b82f50e940/matrix.json- 144104,
11e7f22f5e85058b09ca90e74002a3b82f50e940/matrix.json- 142796,
11e7f22f5e85058b09ca90e74002a3b82f50e940/matrix.json- 143081,
11e7f22f5e85058b09ca90e74002a3b82f50e940/matrix.json- 143623
11e7f22f5e85058b09ca90e74002a3b82f50e940/matrix.json- ],
280b792cac62ddadca2935766ca870b438c86323/matrix.json: "will-it-scale.per_process_ops": [
280b792cac62ddadca2935766ca870b438c86323/matrix.json- 134451,
280b792cac62ddadca2935766ca870b438c86323/matrix.json- 135089,
280b792cac62ddadca2935766ca870b438c86323/matrix.json- 135080,
280b792cac62ddadca2935766ca870b438c86323/matrix.json- 135039,
280b792cac62ddadca2935766ca870b438c86323/matrix.json- 134082,
280b792cac62ddadca2935766ca870b438c86323/matrix.json- 135301
280b792cac62ddadca2935766ca870b438c86323/matrix.json- ],
>
> My testing didn't produce anything like this. I'll have a look into
> this when I can, but there isn't anything obvious that sticks out as a
> likely cause.
if you want us to test any debug patch, it will be our great pleasure. thanks!
>
> Thanks,
> Liam
>
>
> >
> >
> > 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@xxxxxxxxx>
> > | Closes: https://lore.kernel.org/oe-lkp/202605131554.92e7df6b-lkp@xxxxxxxxx
> >
> >
> > Details are as below:
> > -------------------------------------------------------------------------------------------------->
> >
> >
> > The kernel config and materials to reproduce are available at:
> > https://download.01.org/0day-ci/archive/20260513/202605131554.92e7df6b-lkp@xxxxxxxxx
> >
> > =========================================================================================
> > compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
> > gcc-14/performance/x86_64-rhel-9.4/process/100%/debian-13-x86_64-20250902.cgz/lkp-ivb-2ep2/mmap2/will-it-scale
> >
> > commit:
> > 11e7f22f5e ("maple_tree: add cp_converged() helper")
> > 280b792cac ("maple_tree: use maple copy node for mas_wr_split()")
> >
> > 11e7f22f5e85058b 280b792cac62ddadca2935766ca
> > ---------------- ---------------------------
> > %stddev %change %stddev
> > \ | \
> > 6885401 -6.0% 6472359 will-it-scale.48.processes
> > 143445 -6.0% 134840 will-it-scale.per_process_ops
> > 6885401 -6.0% 6472359 will-it-scale.workload
> > 14.44 -1.0 13.42 mpstat.cpu.all.usr%
> > 17.55 -4.9% 16.69 turbostat.RAMWatt
> > 4812 ± 4% -11.4% 4266 ± 4% vmstat.system.cs
> > 17354 ± 3% -9.2% 15750 ± 3% sched_debug.cpu.nr_switches.avg
> > 10034 ± 11% -25.7% 7451 ± 16% sched_debug.cpu.nr_switches.min
> > 674817 -2.6% 657530 proc-vmstat.nr_active_anon
> > 1446441 -1.2% 1429254 proc-vmstat.nr_file_pages
> > 505185 -3.4% 487999 proc-vmstat.nr_shmem
> > 50084 -3.1% 48542 proc-vmstat.nr_slab_unreclaimable
> > 674817 -2.6% 657530 proc-vmstat.nr_zone_active_anon
> > 0.37 ± 2% -6.8% 0.35 perf-stat.i.MPKI
> > 76468991 -1.9% 74991763 perf-stat.i.branch-misses
> > 20.62 ± 2% -2.6 18.02 ± 2% perf-stat.i.cache-miss-rate%
> > 34114286 ± 2% -7.8% 31452733 perf-stat.i.cache-misses
> > 1.675e+08 +6.0% 1.775e+08 perf-stat.i.cache-references
> > 4800 ± 4% -11.4% 4254 ± 4% perf-stat.i.context-switches
> > 1.55 +0.9% 1.57 perf-stat.i.cpi
> > 4185 ± 2% +8.3% 4534 perf-stat.i.cycles-between-cache-misses
> > 9.151e+10 -1.0% 9.063e+10 perf-stat.i.instructions
> > 0.37 ± 2% -6.9% 0.35 perf-stat.overall.MPKI
> > 0.39 -0.0 0.39 perf-stat.overall.branch-miss-rate%
> > 20.35 ± 2% -2.6 17.70 ± 2% perf-stat.overall.cache-miss-rate%
> > 1.55 +0.9% 1.57 perf-stat.overall.cpi
> > 4163 ± 2% +8.4% 4514 perf-stat.overall.cycles-between-cache-misses
> > 4010019 +5.4% 4225135 perf-stat.overall.path-length
> > 76161250 -1.9% 74678157 perf-stat.ps.branch-misses
> > 34001097 ± 2% -7.8% 31340807 perf-stat.ps.cache-misses
> > 1.671e+08 +6.0% 1.771e+08 perf-stat.ps.cache-references
> > 4780 ± 4% -11.4% 4233 ± 4% perf-stat.ps.context-switches
> > 9.12e+10 -1.0% 9.033e+10 perf-stat.ps.instructions
> > 19.40 -0.9 18.54 perf-profile.calltrace.cycles-pp.vms_complete_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap.__x64_sys_munmap
> > 15.57 -0.8 14.77 perf-profile.calltrace.cycles-pp.unmap_region.vms_complete_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap
> > 8.86 -0.5 8.39 ± 2% perf-profile.calltrace.cycles-pp.perf_event_mmap.__mmap_region.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff
> > 12.99 -0.5 12.52 perf-profile.calltrace.cycles-pp.__mmap_new_vma.__mmap_region.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff
> > 8.50 -0.5 8.05 ± 2% perf-profile.calltrace.cycles-pp.perf_event_mmap_event.perf_event_mmap.__mmap_region.do_mmap.vm_mmap_pgoff
> > 7.73 -0.4 7.32 perf-profile.calltrace.cycles-pp.unmap_page_range.unmap_vmas.unmap_region.vms_complete_munmap_vmas.do_vmi_align_munmap
> > 8.46 -0.4 8.06 perf-profile.calltrace.cycles-pp.unmap_vmas.unmap_region.vms_complete_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap
> > 3.94 -0.4 3.56 perf-profile.calltrace.cycles-pp.free_pgd_range.free_pgtables.unmap_region.vms_complete_munmap_vmas.do_vmi_align_munmap
> > 6.70 -0.4 6.33 perf-profile.calltrace.cycles-pp.zap_pmd_range.unmap_page_range.unmap_vmas.unmap_region.vms_complete_munmap_vmas
> > 6.08 -0.4 5.71 perf-profile.calltrace.cycles-pp.free_pgtables.unmap_region.vms_complete_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap
> > 55.07 -0.4 54.71 perf-profile.calltrace.cycles-pp.__mmap
> > 3.59 -0.3 3.25 perf-profile.calltrace.cycles-pp.free_p4d_range.free_pgd_range.free_pgtables.unmap_region.vms_complete_munmap_vmas
> > 3.72 -0.3 3.40 perf-profile.calltrace.cycles-pp.entry_SYSRETQ_unsafe_stack.__mmap
> > 3.09 -0.3 2.79 perf-profile.calltrace.cycles-pp.free_pud_range.free_p4d_range.free_pgd_range.free_pgtables.unmap_region
> > 4.14 -0.3 3.86 perf-profile.calltrace.cycles-pp.mas_wr_node_store.mas_store_prealloc.__mmap_new_vma.__mmap_region.do_mmap
> > 3.54 -0.3 3.27 perf-profile.calltrace.cycles-pp.entry_SYSRETQ_unsafe_stack.__munmap
> > 3.22 ± 2% -0.3 2.96 ± 2% perf-profile.calltrace.cycles-pp.mas_preallocate.__mmap_new_vma.__mmap_region.do_mmap.vm_mmap_pgoff
> > 1.57 -0.2 1.37 perf-profile.calltrace.cycles-pp.mas_find.__mmap_region.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff
> > 4.98 -0.2 4.81 perf-profile.calltrace.cycles-pp.mas_store_prealloc.__mmap_new_vma.__mmap_region.do_mmap.vm_mmap_pgoff
> > 0.88 -0.2 0.71 perf-profile.calltrace.cycles-pp.mas_walk.mas_find.__mmap_region.do_mmap.vm_mmap_pgoff
> > 3.78 -0.1 3.66 perf-profile.calltrace.cycles-pp.mas_wr_node_store.mas_store_gfp.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap
> > 1.82 ± 2% -0.1 1.72 ± 2% perf-profile.calltrace.cycles-pp.kmem_cache_free.vms_complete_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap
> > 0.65 -0.1 0.56 perf-profile.calltrace.cycles-pp.memcpy_orig.mas_wr_node_store.mas_store_gfp.do_vmi_align_munmap.do_vmi_munmap
> > 1.53 -0.1 1.45 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.__munmap
> > 1.38 -0.1 1.30 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.__munmap
> > 0.65 -0.1 0.58 perf-profile.calltrace.cycles-pp.vma_merge_new_range.__mmap_region.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff
> > 1.46 -0.1 1.41 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.__mmap
> > 0.97 ± 2% -0.1 0.91 perf-profile.calltrace.cycles-pp.atime_needs_update.touch_atime.shmem_mmap_prepare.__mmap_region.do_mmap
> > 1.36 -0.0 1.31 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.__mmap
> > 0.76 -0.0 0.72 perf-profile.calltrace.cycles-pp.__vma_start_write.vms_gather_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap
> > 0.69 -0.0 0.66 perf-profile.calltrace.cycles-pp.__filemap_get_folio_mpol.freader_get_folio.freader_fetch.__build_id_parse.perf_event_mmap_event
> > 0.56 -0.0 0.53 ± 2% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.__mmap
> > 0.78 ± 2% +0.0 0.83 perf-profile.calltrace.cycles-pp.mas_wr_store_type.mas_preallocate.__mmap_new_vma.__mmap_region.do_mmap
> > 0.72 +0.1 0.80 perf-profile.calltrace.cycles-pp.vma_link_file.__mmap_new_vma.__mmap_region.do_mmap.vm_mmap_pgoff
> > 1.24 +0.1 1.32 perf-profile.calltrace.cycles-pp.unlink_file_vma_batch_final.free_pgtables.unmap_region.vms_complete_munmap_vmas.do_vmi_align_munmap
> > 1.38 +0.1 1.48 perf-profile.calltrace.cycles-pp.mas_find.do_vmi_munmap.__vm_munmap.__x64_sys_munmap.do_syscall_64
> > 2.39 +0.2 2.55 perf-profile.calltrace.cycles-pp.mas_empty_area_rev.unmapped_area_topdown.vm_unmapped_area.arch_get_unmapped_area_topdown.shmem_get_unmapped_area
> > 45.68 +0.2 45.93 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.__mmap
> > 45.52 +0.3 45.78 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.__mmap
> > 0.82 +0.3 1.09 perf-profile.calltrace.cycles-pp.mas_wr_store_type.mas_store_gfp.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap
> > 1.59 +0.3 1.89 perf-profile.calltrace.cycles-pp.mas_rev_awalk.mas_empty_area_rev.unmapped_area_topdown.vm_unmapped_area.arch_get_unmapped_area_topdown
> > 44.54 +0.4 44.94 perf-profile.calltrace.cycles-pp.ksys_mmap_pgoff.do_syscall_64.entry_SYSCALL_64_after_hwframe.__mmap
> > 7.12 +0.4 7.56 perf-profile.calltrace.cycles-pp.__get_unmapped_area.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff.do_syscall_64
> > 6.68 +0.5 7.16 perf-profile.calltrace.cycles-pp.shmem_get_unmapped_area.__get_unmapped_area.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff
> > 42.98 +0.5 43.52 perf-profile.calltrace.cycles-pp.vm_mmap_pgoff.ksys_mmap_pgoff.do_syscall_64.entry_SYSCALL_64_after_hwframe.__mmap
> > 41.67 +0.6 42.29 perf-profile.calltrace.cycles-pp.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 5.47 +0.6 6.10 perf-profile.calltrace.cycles-pp.arch_get_unmapped_area_topdown.shmem_get_unmapped_area.__get_unmapped_area.do_mmap.vm_mmap_pgoff
> > 0.00 +0.6 0.64 ± 8% perf-profile.calltrace.cycles-pp.__refill_objects_node.refill_objects.__pcs_replace_empty_main.kmem_cache_alloc_noprof.mas_preallocate
> > 32.58 +0.7 33.24 perf-profile.calltrace.cycles-pp.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap.__x64_sys_munmap.do_syscall_64
> > 0.56 ± 2% +0.7 1.27 perf-profile.calltrace.cycles-pp.mas_prev_slot.unmapped_area_topdown.vm_unmapped_area.arch_get_unmapped_area_topdown.shmem_get_unmapped_area
> > 34.16 +0.7 34.89 perf-profile.calltrace.cycles-pp.do_vmi_munmap.__vm_munmap.__x64_sys_munmap.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 4.48 +0.7 5.20 perf-profile.calltrace.cycles-pp.vm_unmapped_area.arch_get_unmapped_area_topdown.shmem_get_unmapped_area.__get_unmapped_area.do_mmap
> > 0.00 +0.7 0.73 perf-profile.calltrace.cycles-pp.mas_prev_node.mas_prev_slot.unmapped_area_topdown.vm_unmapped_area.arch_get_unmapped_area_topdown
> > 4.32 +0.7 5.07 perf-profile.calltrace.cycles-pp.unmapped_area_topdown.vm_unmapped_area.arch_get_unmapped_area_topdown.shmem_get_unmapped_area.__get_unmapped_area
> > 0.00 +0.8 0.75 perf-profile.calltrace.cycles-pp.mas_next_node.mas_next_slot.__mmap_region.do_mmap.vm_mmap_pgoff
> > 34.96 +0.8 35.72 perf-profile.calltrace.cycles-pp.__vm_munmap.__x64_sys_munmap.do_syscall_64.entry_SYSCALL_64_after_hwframe.__munmap
> > 35.97 +0.8 36.73 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.__munmap
> > 35.80 +0.8 36.57 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.__munmap
> > 0.00 +0.8 0.79 perf-profile.calltrace.cycles-pp.mas_next_node.mas_next_slot.mas_find.vms_gather_munmap_vmas.do_vmi_align_munmap
> > 0.79 +0.8 1.58 perf-profile.calltrace.cycles-pp.mas_prev_slot.vms_gather_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap
> > 0.00 +0.8 0.80 ± 2% perf-profile.calltrace.cycles-pp.mas_prev_node.mas_prev_slot.vms_gather_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap
> > 0.00 +0.8 0.80 perf-profile.calltrace.cycles-pp.mas_prev_slot.__mmap_region.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff
> > 35.04 +0.8 35.85 perf-profile.calltrace.cycles-pp.__x64_sys_munmap.do_syscall_64.entry_SYSCALL_64_after_hwframe.__munmap
> > 0.00 +0.8 0.81 ± 7% perf-profile.calltrace.cycles-pp.refill_objects.__pcs_replace_empty_main.kmem_cache_alloc_noprof.mas_preallocate.__mmap_new_vma
> > 0.97 +0.8 1.80 perf-profile.calltrace.cycles-pp.mas_find.vms_gather_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap
> > 0.73 +0.8 1.56 perf-profile.calltrace.cycles-pp.mas_next_slot.mas_find.vms_gather_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap
> > 0.00 +0.9 0.95 ± 7% perf-profile.calltrace.cycles-pp.__pcs_replace_empty_main.kmem_cache_alloc_noprof.mas_preallocate.__mmap_new_vma.__mmap_region
> > 0.00 +1.1 1.09 perf-profile.calltrace.cycles-pp.mas_next_slot.__mmap_region.do_mmap.vm_mmap_pgoff.ksys_mmap_pgoff
> > 5.22 +1.5 6.75 perf-profile.calltrace.cycles-pp.vms_gather_munmap_vmas.do_vmi_align_munmap.do_vmi_munmap.__vm_munmap.__x64_sys_munmap
> > 0.00 +1.5 1.55 ± 5% perf-profile.calltrace.cycles-pp.kmem_cache_alloc_noprof.mas_preallocate.__mmap_new_vma.__mmap_region.do_mmap
> > 19.61 -0.8 18.76 perf-profile.children.cycles-pp.vms_complete_munmap_vmas
> > 15.58 -0.8 14.79 perf-profile.children.cycles-pp.unmap_region
> > 8.68 -0.8 7.93 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
> > 8.88 -0.5 8.40 ± 2% perf-profile.children.cycles-pp.perf_event_mmap
> > 13.03 -0.5 12.57 perf-profile.children.cycles-pp.__mmap_new_vma
> > 8.56 -0.5 8.11 ± 2% perf-profile.children.cycles-pp.perf_event_mmap_event
> > 1.40 -0.4 0.98 perf-profile.children.cycles-pp.memcpy_orig
> > 7.75 -0.4 7.34 perf-profile.children.cycles-pp.unmap_page_range
> > 8.08 -0.4 7.67 perf-profile.children.cycles-pp.mas_wr_node_store
> > 8.48 -0.4 8.07 perf-profile.children.cycles-pp.unmap_vmas
> > 3.96 -0.4 3.58 perf-profile.children.cycles-pp.free_pgd_range
> > 6.72 -0.4 6.35 perf-profile.children.cycles-pp.zap_pmd_range
> > 6.16 -0.4 5.80 perf-profile.children.cycles-pp.free_pgtables
> > 3.61 -0.3 3.26 perf-profile.children.cycles-pp.free_p4d_range
> > 3.10 -0.3 2.80 perf-profile.children.cycles-pp.free_pud_range
> > 54.52 -0.3 54.23 perf-profile.children.cycles-pp.__mmap
> > 3.24 ± 2% -0.3 2.98 ± 2% perf-profile.children.cycles-pp.mas_preallocate
> > 5.28 -0.2 5.06 perf-profile.children.cycles-pp.kmem_cache_alloc_noprof
> > 2.34 -0.2 2.13 perf-profile.children.cycles-pp.mas_walk
> > 5.00 -0.2 4.82 perf-profile.children.cycles-pp.mas_store_prealloc
> > 3.46 -0.2 3.31 perf-profile.children.cycles-pp.entry_SYSCALL_64
> > 3.06 -0.1 2.92 perf-profile.children.cycles-pp.syscall_return_via_sysret
> > 1.95 ± 2% -0.1 1.84 perf-profile.children.cycles-pp.__pcs_replace_empty_main
> > 0.30 ± 3% -0.1 0.20 ± 3% perf-profile.children.cycles-pp.mas_prev_setup
> > 1.83 ± 2% -0.1 1.74 perf-profile.children.cycles-pp.kmem_cache_free
> > 1.40 -0.1 1.32 perf-profile.children.cycles-pp.__refill_objects_node
> > 0.70 -0.1 0.62 perf-profile.children.cycles-pp.vma_merge_new_range
> > 0.27 ± 2% -0.1 0.20 ± 3% perf-profile.children.cycles-pp.unlink_file_vma_batch_add
> > 0.57 ± 3% -0.1 0.50 ± 3% perf-profile.children.cycles-pp.mas_prev
> > 0.23 ± 2% -0.1 0.17 ± 4% perf-profile.children.cycles-pp.mas_prev_range
> > 0.38 ± 8% -0.1 0.32 ± 3% perf-profile.children.cycles-pp.strlen
> > 0.43 ± 2% -0.1 0.37 perf-profile.children.cycles-pp.fput
> > 0.68 ± 2% -0.1 0.62 ± 2% perf-profile.children.cycles-pp.copy_from_kernel_nofault
> > 0.62 -0.1 0.57 ± 2% perf-profile.children.cycles-pp.__vma_start_exclude_readers
> > 0.76 ± 2% -0.0 0.71 ± 2% perf-profile.children.cycles-pp.prepend_copy
> > 0.79 -0.0 0.74 ± 4% perf-profile.children.cycles-pp.__kfree_rcu_sheaf
> > 0.99 ± 2% -0.0 0.95 ± 2% perf-profile.children.cycles-pp.atime_needs_update
> > 1.12 -0.0 1.07 ± 2% perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
> > 0.36 ± 2% -0.0 0.32 ± 2% perf-profile.children.cycles-pp.security_mmap_file
> > 0.38 ± 2% -0.0 0.34 perf-profile.children.cycles-pp.arch_exit_to_user_mode_prepare
> > 0.19 ± 3% -0.0 0.16 ± 4% perf-profile.children.cycles-pp.__x64_sys_mmap
> > 0.63 -0.0 0.60 perf-profile.children.cycles-pp.up_write
> > 0.39 -0.0 0.36 perf-profile.children.cycles-pp.mas_wr_store_entry
> > 0.11 ± 4% -0.0 0.08 perf-profile.children.cycles-pp.get_align_mask
> > 0.24 ± 3% -0.0 0.22 ± 4% perf-profile.children.cycles-pp.copy_from_kernel_nofault_allowed
> > 0.40 -0.0 0.38 ± 2% perf-profile.children.cycles-pp.mas_next_range
> > 0.30 ± 2% -0.0 0.28 ± 3% perf-profile.children.cycles-pp.can_vma_merge_right
> > 0.32 ± 3% -0.0 0.30 ± 3% perf-profile.children.cycles-pp.__rcu_free_sheaf_prepare
> > 0.33 ± 2% -0.0 0.31 perf-profile.children.cycles-pp.unmap_single_vma
> > 0.21 ± 3% -0.0 0.19 ± 2% perf-profile.children.cycles-pp.mmap_action_complete
> > 0.34 -0.0 0.33 ± 2% perf-profile.children.cycles-pp.tlb_gather_mmu
> > 0.33 -0.0 0.32 perf-profile.children.cycles-pp.tlb_finish_mmu
> > 0.09 ± 5% -0.0 0.07 ± 6% perf-profile.children.cycles-pp.barn_replace_empty_sheaf
> > 0.14 ± 3% -0.0 0.12 ± 3% perf-profile.children.cycles-pp.get_mmap_base
> > 0.06 -0.0 0.05 perf-profile.children.cycles-pp.barn_get_empty_sheaf
> > 0.06 -0.0 0.05 perf-profile.children.cycles-pp.rcu_cblist_dequeue
> > 0.08 +0.0 0.09 perf-profile.children.cycles-pp.mas_nomem
> > 0.06 +0.0 0.07 ± 5% perf-profile.children.cycles-pp.unlink_file_vma_batch_init
> > 0.31 +0.0 0.32 ± 2% perf-profile.children.cycles-pp.userfaultfd_unmap_complete
> > 0.13 ± 3% +0.0 0.15 ± 3% perf-profile.children.cycles-pp.vm_area_free
> > 0.11 +0.0 0.13 ± 3% perf-profile.children.cycles-pp.build_id_parse_nofault
> > 0.14 ± 5% +0.0 0.16 ± 3% perf-profile.children.cycles-pp.userfaultfd_unmap_prep
> > 0.48 +0.0 0.50 perf-profile.children.cycles-pp.hrtimer_interrupt
> > 0.20 ± 3% +0.0 0.22 ± 3% perf-profile.children.cycles-pp.is_vmalloc_addr
> > 0.46 ± 2% +0.0 0.48 perf-profile.children.cycles-pp.filemap_get_entry
> > 0.08 ± 4% +0.0 0.11 ± 4% perf-profile.children.cycles-pp.vma_wants_writenotify
> > 0.13 ± 7% +0.0 0.16 ± 2% perf-profile.children.cycles-pp.mmap_region
> > 0.11 ± 4% +0.0 0.14 ± 5% perf-profile.children.cycles-pp.mas_next_setup
> > 0.27 ± 3% +0.0 0.31 ± 4% perf-profile.children.cycles-pp.__thp_vma_allowable_orders
> > 0.31 ± 3% +0.0 0.35 ± 3% perf-profile.children.cycles-pp.__x86_indirect_thunk_rax
> > 0.13 ± 3% +0.0 0.18 ± 4% perf-profile.children.cycles-pp.rb_next
> > 0.08 ± 6% +0.1 0.14 ± 3% perf-profile.children.cycles-pp.ksm_vma_flags
> > 0.47 ± 3% +0.1 0.53 ± 3% perf-profile.children.cycles-pp.down_write
> > 0.35 ± 3% +0.1 0.42 ± 3% perf-profile.children.cycles-pp.vma_interval_tree_remove
> > 0.74 +0.1 0.82 perf-profile.children.cycles-pp.vma_link_file
> > 1.24 +0.1 1.33 perf-profile.children.cycles-pp.unlink_file_vma_batch_final
> > 2.44 +0.1 2.58 perf-profile.children.cycles-pp.mas_empty_area_rev
> > 0.66 ± 5% +0.2 0.89 perf-profile.children.cycles-pp.mas_wr_walk_descend
> > 1.62 +0.3 1.90 perf-profile.children.cycles-pp.mas_rev_awalk
> > 1.71 +0.3 2.04 perf-profile.children.cycles-pp.mas_wr_store_type
> > 44.55 +0.4 44.96 perf-profile.children.cycles-pp.ksys_mmap_pgoff
> > 7.13 +0.4 7.56 perf-profile.children.cycles-pp.__get_unmapped_area
> > 6.69 +0.5 7.17 perf-profile.children.cycles-pp.shmem_get_unmapped_area
> > 43.01 +0.5 43.55 perf-profile.children.cycles-pp.vm_mmap_pgoff
> > 5.53 +0.6 6.14 perf-profile.children.cycles-pp.arch_get_unmapped_area_topdown
> > 41.71 +0.6 42.34 perf-profile.children.cycles-pp.do_mmap
> > 32.60 +0.7 33.26 perf-profile.children.cycles-pp.do_vmi_align_munmap
> > 5.05 +0.7 5.75 perf-profile.children.cycles-pp.mas_find
> > 34.19 +0.7 34.90 perf-profile.children.cycles-pp.do_vmi_munmap
> > 4.49 +0.7 5.21 perf-profile.children.cycles-pp.vm_unmapped_area
> > 4.34 +0.7 5.09 perf-profile.children.cycles-pp.unmapped_area_topdown
> > 34.99 +0.8 35.74 perf-profile.children.cycles-pp.__vm_munmap
> > 35.06 +0.8 35.87 perf-profile.children.cycles-pp.__x64_sys_munmap
> > 0.00 +1.0 0.99 perf-profile.children.cycles-pp.mas_ascend
> > 81.44 +1.0 82.44 perf-profile.children.cycles-pp.do_syscall_64
> > 81.77 +1.0 82.79 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
> > 5.30 +1.5 6.82 perf-profile.children.cycles-pp.vms_gather_munmap_vmas
> > 0.00 +1.6 1.58 perf-profile.children.cycles-pp.mas_next_node
> > 1.84 +1.6 3.48 perf-profile.children.cycles-pp.mas_next_slot
> > 1.75 +2.0 3.72 perf-profile.children.cycles-pp.mas_prev_slot
> > 0.00 +2.0 2.01 perf-profile.children.cycles-pp.mas_prev_node
> > 8.62 -0.8 7.87 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
> > 1.32 -0.4 0.91 perf-profile.self.cycles-pp.memcpy_orig
> > 4.40 -0.3 4.09 perf-profile.self.cycles-pp.zap_pmd_range
> > 2.96 -0.3 2.68 perf-profile.self.cycles-pp.free_pud_range
> > 2.19 -0.2 1.99 perf-profile.self.cycles-pp.mas_walk
> > 3.05 -0.2 2.89 perf-profile.self.cycles-pp.syscall_return_via_sysret
> > 3.07 -0.1 2.94 perf-profile.self.cycles-pp.entry_SYSCALL_64
> > 0.38 ± 7% -0.1 0.27 ± 3% perf-profile.self.cycles-pp.current_time
> > 0.62 -0.1 0.52 perf-profile.self.cycles-pp.do_vmi_align_munmap
> > 0.80 -0.1 0.71 ± 5% perf-profile.self.cycles-pp.do_syscall_64
> > 0.25 ± 3% -0.1 0.17 ± 4% perf-profile.self.cycles-pp.mas_prev_setup
> > 0.76 ± 5% -0.1 0.68 ± 3% perf-profile.self.cycles-pp.perf_event_mmap_event
> > 0.24 -0.1 0.17 ± 2% perf-profile.self.cycles-pp.unlink_file_vma_batch_add
> > 0.52 ± 6% -0.1 0.46 ± 6% perf-profile.self.cycles-pp.kmem_cache_free
> > 0.80 -0.1 0.73 ± 2% perf-profile.self.cycles-pp.arch_get_unmapped_area_topdown
> > 0.73 -0.1 0.66 perf-profile.self.cycles-pp.__mmap_new_vma
> > 0.36 ± 8% -0.1 0.30 ± 3% perf-profile.self.cycles-pp.strlen
> > 0.40 ± 2% -0.1 0.34 perf-profile.self.cycles-pp.fput
> > 1.03 -0.1 0.98 perf-profile.self.cycles-pp.__refill_objects_node
> > 0.36 ± 2% -0.1 0.30 ± 2% perf-profile.self.cycles-pp.vm_mmap_pgoff
> > 0.68 ± 3% -0.1 0.62 ± 3% perf-profile.self.cycles-pp.unmapped_area_topdown
> > 0.77 ± 2% -0.1 0.71 ± 4% perf-profile.self.cycles-pp.__kmem_cache_free_bulk
> > 0.34 -0.1 0.29 perf-profile.self.cycles-pp.__build_id_parse
> > 0.53 -0.0 0.48 perf-profile.self.cycles-pp.__vma_start_exclude_readers
> > 0.64 ± 2% -0.0 0.59 perf-profile.self.cycles-pp.ksys_mmap_pgoff
> > 0.28 ± 2% -0.0 0.23 perf-profile.self.cycles-pp.mas_next_range
> > 0.30 ± 3% -0.0 0.26 ± 6% perf-profile.self.cycles-pp.vma_merge_new_range
> > 0.24 -0.0 0.20 ± 3% perf-profile.self.cycles-pp.__filemap_get_folio_mpol
> > 0.60 -0.0 0.56 perf-profile.self.cycles-pp.mas_preallocate
> > 0.64 -0.0 0.60 ± 5% perf-profile.self.cycles-pp.__kfree_rcu_sheaf
> > 0.71 ± 2% -0.0 0.67 ± 2% perf-profile.self.cycles-pp.mas_empty_area_rev
> > 0.37 ± 2% -0.0 0.34 perf-profile.self.cycles-pp.arch_exit_to_user_mode_prepare
> > 0.18 ± 4% -0.0 0.15 ± 4% perf-profile.self.cycles-pp.do_vmi_munmap
> > 0.33 ± 3% -0.0 0.30 ± 2% perf-profile.self.cycles-pp.free_pgd_range
> > 0.25 ± 3% -0.0 0.22 ± 3% perf-profile.self.cycles-pp.__get_unmapped_area
> > 0.10 ± 3% -0.0 0.07 perf-profile.self.cycles-pp.get_align_mask
> > 0.16 ± 4% -0.0 0.13 ± 4% perf-profile.self.cycles-pp.security_mmap_file
> > 0.34 ± 2% -0.0 0.32 perf-profile.self.cycles-pp.mas_wr_store_entry
> > 0.59 ± 2% -0.0 0.56 perf-profile.self.cycles-pp.up_write
> > 0.32 ± 3% -0.0 0.30 ± 3% perf-profile.self.cycles-pp.__rcu_free_sheaf_prepare
> > 0.30 ± 2% -0.0 0.28 perf-profile.self.cycles-pp.perf_event_mmap
> > 0.21 ± 3% -0.0 0.19 ± 4% perf-profile.self.cycles-pp.copy_from_kernel_nofault_allowed
> > 0.18 ± 2% -0.0 0.16 ± 3% perf-profile.self.cycles-pp.mmap_action_complete
> > 0.12 ± 3% -0.0 0.10 ± 3% perf-profile.self.cycles-pp.khugepaged_enter_vma
> > 0.30 -0.0 0.28 ± 2% perf-profile.self.cycles-pp.unmap_vmas
> > 0.15 ± 4% -0.0 0.13 ± 3% perf-profile.self.cycles-pp.__vm_enough_memory
> > 0.06 -0.0 0.04 ± 44% perf-profile.self.cycles-pp.rcu_cblist_dequeue
> > 0.18 ± 3% -0.0 0.16 ± 4% perf-profile.self.cycles-pp.unmap_single_vma
> > 0.31 -0.0 0.29 perf-profile.self.cycles-pp.tlb_finish_mmu
> > 0.11 ± 3% -0.0 0.09 ± 5% perf-profile.self.cycles-pp.vm_unmapped_area
> > 0.33 -0.0 0.31 ± 2% perf-profile.self.cycles-pp.tlb_gather_mmu
> > 0.14 ± 3% -0.0 0.12 ± 5% perf-profile.self.cycles-pp.__x64_sys_mmap
> > 0.07 +0.0 0.08 perf-profile.self.cycles-pp.mas_nomem
> > 0.05 +0.0 0.06 ± 6% perf-profile.self.cycles-pp.unlink_file_vma_batch_init
> > 0.06 +0.0 0.07 ± 5% perf-profile.self.cycles-pp.__pi_memcpy
> > 0.28 +0.0 0.30 ± 2% perf-profile.self.cycles-pp.userfaultfd_unmap_complete
> > 0.12 ± 5% +0.0 0.14 ± 3% perf-profile.self.cycles-pp.userfaultfd_unmap_prep
> > 0.15 ± 6% +0.0 0.17 ± 2% perf-profile.self.cycles-pp.freader_get_folio
> > 0.23 ± 2% +0.0 0.25 perf-profile.self.cycles-pp.filemap_get_entry
> > 0.19 ± 2% +0.0 0.22 ± 4% perf-profile.self.cycles-pp.remove_vma
> > 0.24 ± 2% +0.0 0.26 perf-profile.self.cycles-pp.vma_link_file
> > 0.07 ± 6% +0.0 0.10 ± 5% perf-profile.self.cycles-pp.vma_wants_writenotify
> > 0.12 ± 8% +0.0 0.14 ± 3% perf-profile.self.cycles-pp.mmap_region
> > 0.23 ± 4% +0.0 0.26 ± 2% perf-profile.self.cycles-pp.vma_interval_tree_remove
> > 0.10 ± 4% +0.0 0.13 ± 2% perf-profile.self.cycles-pp.mas_next_setup
> > 0.26 ± 2% +0.0 0.29 ± 4% perf-profile.self.cycles-pp.__thp_vma_allowable_orders
> > 0.11 ± 3% +0.0 0.15 ± 6% perf-profile.self.cycles-pp.rb_next
> > 0.27 +0.0 0.30 perf-profile.self.cycles-pp.freader_fetch
> > 0.29 ± 3% +0.0 0.33 ± 4% perf-profile.self.cycles-pp.__x86_indirect_thunk_rax
> > 0.45 ± 2% +0.0 0.49 ± 4% perf-profile.self.cycles-pp.down_write_killable
> > 0.33 ± 2% +0.0 0.38 ± 3% perf-profile.self.cycles-pp.__vma_start_write
> > 1.55 +0.1 1.60 perf-profile.self.cycles-pp.mas_store_gfp
> > 0.07 ± 7% +0.1 0.12 ± 5% perf-profile.self.cycles-pp.ksm_vma_flags
> > 0.26 +0.1 0.32 perf-profile.self.cycles-pp.shmem_mmap_prepare
> > 0.44 ± 4% +0.1 0.50 ± 3% perf-profile.self.cycles-pp.down_write
> > 1.00 +0.1 1.10 perf-profile.self.cycles-pp.mas_wr_store_type
> > 1.69 +0.1 1.79 perf-profile.self.cycles-pp.mas_next_slot
> > 0.65 +0.1 0.75 ± 2% perf-profile.self.cycles-pp.mas_store_prealloc
> > 1.10 +0.1 1.23 perf-profile.self.cycles-pp.mas_find
> > 0.62 ± 5% +0.2 0.84 perf-profile.self.cycles-pp.mas_wr_walk_descend
> > 1.16 +0.6 1.80 perf-profile.self.cycles-pp.mas_rev_awalk
> > 0.00 +0.9 0.91 perf-profile.self.cycles-pp.mas_ascend
> > 0.00 +1.2 1.18 perf-profile.self.cycles-pp.mas_next_node
> > 0.00 +1.3 1.27 ± 2% perf-profile.self.cycles-pp.mas_prev_node
> >
> >
> >
> >
> > 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
> >
> >
> > --
> > maple-tree mailing list
> > maple-tree@xxxxxxxxxxxxxxxxxxx
> > https://lists.infradead.org/mailman/listinfo/maple-tree
>