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Message-ID: <20200620143808.GG5535@shao2-debian>
Date:   Sat, 20 Jun 2020 22:38:08 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Mike Rapoport <rppt@...ux.ibm.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Brian Cain <bcain@...eaurora.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Chris Zankel <chris@...kel.net>,
        "David S. Miller" <davem@...emloft.net>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greentime Hu <green.hu@...il.com>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Guan Xuetao <gxt@....edu.cn>, Guo Ren <guoren@...nel.org>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Helge Deller <deller@....de>, Ingo Molnar <mingo@...hat.com>,
        Ley Foon Tan <ley.foon.tan@...el.com>,
        Mark Salter <msalter@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Matt Turner <mattst88@...il.com>,
        Max Filippov <jcmvbkbc@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michal Simek <monstr@...str.eu>,
        Nick Hu <nickhu@...estech.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Richard Weinberger <richard@....at>,
        Rich Felker <dalias@...c.org>,
        Russell King <linux@...linux.org.uk>,
        Stafford Horne <shorne@...il.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tony Luck <tony.luck@...el.com>,
        Vincent Chen <deanbo422@...il.com>,
        Vineet Gupta <vgupta@...opsys.com>,
        Will Deacon <will@...nel.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: [mm] 974b9b2c68: will-it-scale.per_process_ops -1.8% regression

Greeting,

FYI, we noticed a -1.8% regression of will-it-scale.per_process_ops due to commit:


commit: 974b9b2c68f3d35a65e80af9657fe378d2439b60 ("mm: consolidate pte_index() and pte_offset_*() definitions")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: will-it-scale
on test machine: 104 threads Skylake with 192G memory
with following parameters:

	nr_task: 100%
	mode: process
	test: brk1
	cpufreq_governor: performance
	ucode: 0x2000065

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



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

=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase/ucode:
  gcc-9/performance/x86_64-rhel-7.6/process/100%/debian-x86_64-20191114.cgz/lkp-skl-fpga01/brk1/will-it-scale/0x2000065

commit: 
  e05c7b1f2b ("mm: pgtable: add shortcuts for accessing kernel PMD and PTE")
  974b9b2c68 ("mm: consolidate pte_index() and pte_offset_*() definitions")

e05c7b1f2bc4b7b2 974b9b2c68f3d35a65e80af9657 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
    888745            -1.8%     872327        will-it-scale.per_process_ops
  92429549            -1.8%   90722137        will-it-scale.workload
  18772480 ±  6%     +19.8%   22486016 ±  6%  meminfo.DirectMap2M
     30.25            -4.1%      29.00        vmstat.cpu.us
     27762 ± 60%     -83.1%       4691 ± 44%  proc-vmstat.numa_pte_updates
    751487            -1.9%     736909        proc-vmstat.pgfree
      9726 ± 13%     +18.3%      11509 ± 20%  sched_debug.cfs_rq:/.load.avg
      7758 ±115%    +188.5%      22385 ± 86%  sched_debug.cfs_rq:/.load.stddev
      1309 ±  7%     -15.2%       1110 ± 11%  slabinfo.dmaengine-unmap-16.active_objs
      1309 ±  7%     -15.2%       1110 ± 11%  slabinfo.dmaengine-unmap-16.num_objs
     15093 ± 20%     -48.2%       7824 ± 76%  numa-meminfo.node0.Inactive
     16391 ± 19%     -45.6%       8911 ± 71%  numa-meminfo.node0.Shmem
     62393 ±  4%     +12.5%      70188 ±  7%  numa-meminfo.node1.Shmem
      4097 ± 19%     -45.6%       2227 ± 71%  numa-vmstat.node0.nr_shmem
     15601 ±  4%     +12.4%      17536 ±  7%  numa-vmstat.node1.nr_shmem
     42915 ± 32%     -20.1%      34296 ± 24%  numa-vmstat.node1.numa_other
    662.50 ± 36%     -65.0%     231.75 ± 29%  interrupts.39:PCI-MSI.67633154-edge.eth0-TxRx-1
     11473 ± 40%     -94.1%     679.25 ± 19%  interrupts.41:PCI-MSI.67633156-edge.eth0-TxRx-3
    970.25 ± 52%     -40.2%     579.75 ± 13%  interrupts.CPU27.RES:Rescheduling_interrupts
    662.50 ± 36%     -65.0%     231.75 ± 29%  interrupts.CPU31.39:PCI-MSI.67633154-edge.eth0-TxRx-1
     11473 ± 40%     -94.1%     679.25 ± 19%  interrupts.CPU33.41:PCI-MSI.67633156-edge.eth0-TxRx-3
    475.50 ±  6%     +67.9%     798.25 ± 46%  interrupts.CPU4.CAL:Function_call_interrupts
    959.75 ± 68%     -52.7%     454.00        interrupts.CPU73.CAL:Function_call_interrupts
      4688 ± 21%     -33.3%       3126 ±  8%  interrupts.CPU79.CAL:Function_call_interrupts
    494.25 ±  6%     -11.9%     435.50 ±  7%  interrupts.CPU95.CAL:Function_call_interrupts
  3.54e+10            -1.8%  3.475e+10        perf-stat.i.branch-instructions
      0.73            +0.0        0.75        perf-stat.i.branch-miss-rate%
      6.76 ±  4%      +0.6        7.35 ±  5%  perf-stat.i.cache-miss-rate%
      1.69            +2.1%       1.73        perf-stat.i.cpi
  92081628            -1.8%   90379569        perf-stat.i.dTLB-load-misses
 4.834e+10            -1.8%  4.745e+10        perf-stat.i.dTLB-loads
 2.604e+10            -1.9%  2.555e+10        perf-stat.i.dTLB-stores
 1.662e+11            -1.8%  1.631e+11        perf-stat.i.instructions
      0.59            -2.0%       0.58        perf-stat.i.ipc
      1055            -1.8%       1036        perf-stat.i.metric.M/sec
      0.72            +0.0        0.73        perf-stat.overall.branch-miss-rate%
      1.69            +2.1%       1.73        perf-stat.overall.cpi
      1787            -1.5%       1760        perf-stat.overall.instructions-per-iTLB-miss
      0.59            -2.0%       0.58        perf-stat.overall.ipc
 3.528e+10            -1.8%  3.463e+10        perf-stat.ps.branch-instructions
  91760658            -1.8%   90065850        perf-stat.ps.dTLB-load-misses
 4.818e+10            -1.8%  4.729e+10        perf-stat.ps.dTLB-loads
 2.595e+10            -1.9%  2.547e+10        perf-stat.ps.dTLB-stores
 1.656e+11            -1.8%  1.626e+11        perf-stat.ps.instructions
 4.998e+13            -1.8%  4.909e+13        perf-stat.total.instructions
      2.89 ±  2%      -1.6        1.31        perf-profile.calltrace.cycles-pp.security_mmap_addr.get_unmapped_area.do_brk_flags.__x64_sys_brk.do_syscall_64
      5.27            -1.3        3.92        perf-profile.calltrace.cycles-pp.get_unmapped_area.do_brk_flags.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      1.77 ±  2%      -0.9        0.84        perf-profile.calltrace.cycles-pp.cap_mmap_addr.security_mmap_addr.get_unmapped_area.do_brk_flags.__x64_sys_brk
     24.91            -0.7       24.20        perf-profile.calltrace.cycles-pp.do_brk_flags.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
     74.80            -0.6       74.21        perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
     75.79            -0.6       75.22        perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.brk
      0.83            -0.3        0.57 ±  2%  perf-profile.calltrace.cycles-pp.__vma_rb_erase.__do_munmap.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
     57.44            -0.2       57.23        perf-profile.calltrace.cycles-pp.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
      2.06            -0.2        1.86        perf-profile.calltrace.cycles-pp.vma_link.do_brk_flags.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      0.71            -0.1        0.60        perf-profile.calltrace.cycles-pp.__vm_enough_memory.do_brk_flags.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      2.17            -0.1        2.09        perf-profile.calltrace.cycles-pp.remove_vma.__do_munmap.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      1.23            -0.1        1.15        perf-profile.calltrace.cycles-pp.__vma_link_rb.vma_link.do_brk_flags.__x64_sys_brk.do_syscall_64
     99.88            -0.0       99.84        perf-profile.calltrace.cycles-pp.brk
      0.66            +0.0        0.69 ±  2%  perf-profile.calltrace.cycles-pp.vma_merge.do_brk_flags.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      0.55            +0.0        0.58        perf-profile.calltrace.cycles-pp.___might_sleep.unmap_page_range.unmap_vmas.unmap_region.__do_munmap
      0.61            +0.0        0.65        perf-profile.calltrace.cycles-pp.tlb_gather_mmu.unmap_region.__do_munmap.__x64_sys_brk.do_syscall_64
      0.99            +0.1        1.08        perf-profile.calltrace.cycles-pp.strlcpy.perf_event_mmap.do_brk_flags.__x64_sys_brk.do_syscall_64
      1.00            +0.1        1.12        perf-profile.calltrace.cycles-pp.cap_vm_enough_memory.security_vm_enough_memory_mm.do_brk_flags.__x64_sys_brk.do_syscall_64
     24.57            +0.1       24.71        perf-profile.calltrace.cycles-pp.__do_munmap.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
      1.14            +0.2        1.31        perf-profile.calltrace.cycles-pp.tlb_finish_mmu.unmap_region.__do_munmap.__x64_sys_brk.do_syscall_64
      8.01            +0.2        8.19        perf-profile.calltrace.cycles-pp.perf_event_mmap.do_brk_flags.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      5.22            +0.2        5.46        perf-profile.calltrace.cycles-pp.unmap_page_range.unmap_vmas.unmap_region.__do_munmap.__x64_sys_brk
     12.78            +0.2       13.03        perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.brk
     10.13            +0.3       10.43        perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.brk
      2.00            +0.3        2.31        perf-profile.calltrace.cycles-pp.kmem_cache_alloc.vm_area_alloc.do_brk_flags.__x64_sys_brk.do_syscall_64
      1.32            +0.4        1.68        perf-profile.calltrace.cycles-pp.find_vma.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
      1.36            +0.4        1.73        perf-profile.calltrace.cycles-pp.security_vm_enough_memory_mm.do_brk_flags.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      1.39            +0.4        1.81        perf-profile.calltrace.cycles-pp.arch_get_unmapped_area_topdown.get_unmapped_area.do_brk_flags.__x64_sys_brk.do_syscall_64
      6.87            +0.4        7.30        perf-profile.calltrace.cycles-pp.unmap_vmas.unmap_region.__do_munmap.__x64_sys_brk.do_syscall_64
      3.53            +0.5        3.99        perf-profile.calltrace.cycles-pp.vm_area_alloc.do_brk_flags.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      0.00            +0.5        0.54        perf-profile.calltrace.cycles-pp.memcpy_erms.strlcpy.perf_event_mmap.do_brk_flags.__x64_sys_brk
      5.99            +0.6        6.55        perf-profile.calltrace.cycles-pp.find_vma.__do_munmap.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      1.85            +0.7        2.59        perf-profile.calltrace.cycles-pp.vmacache_find.find_vma.__do_munmap.__x64_sys_brk.do_syscall_64
     10.61            +0.9       11.47        perf-profile.calltrace.cycles-pp.unmap_region.__do_munmap.__x64_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      2.92 ±  2%      -1.6        1.32        perf-profile.children.cycles-pp.security_mmap_addr
      5.36            -1.4        4.00        perf-profile.children.cycles-pp.get_unmapped_area
      1.84 ±  2%      -1.0        0.84        perf-profile.children.cycles-pp.cap_mmap_addr
     25.05            -0.7       24.36        perf-profile.children.cycles-pp.do_brk_flags
     74.90            -0.6       74.30        perf-profile.children.cycles-pp.do_syscall_64
     75.87            -0.6       75.30        perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
      0.86            -0.5        0.35 ±  2%  perf-profile.children.cycles-pp.userfaultfd_unmap_prep
      0.84            -0.3        0.57        perf-profile.children.cycles-pp.__vma_rb_erase
     57.65            -0.2       57.42        perf-profile.children.cycles-pp.__x64_sys_brk
      2.17            -0.2        1.96        perf-profile.children.cycles-pp.vma_link
      0.73            -0.1        0.63        perf-profile.children.cycles-pp.__vm_enough_memory
      0.43 ±  3%      -0.1        0.34        perf-profile.children.cycles-pp.__x86_retpoline_rbp
      2.27            -0.1        2.19        perf-profile.children.cycles-pp.remove_vma
      1.24            -0.1        1.16        perf-profile.children.cycles-pp.__vma_link_rb
      0.95            -0.1        0.89        perf-profile.children.cycles-pp.percpu_counter_add_batch
      0.25            -0.0        0.21 ±  2%  perf-profile.children.cycles-pp.__vma_link_list
      0.43 ±  2%      -0.0        0.39 ±  3%  perf-profile.children.cycles-pp.unmap_single_vma
      0.39 ±  2%      -0.0        0.35        perf-profile.children.cycles-pp.fpregs_assert_state_consistent
      0.41 ±  2%      -0.0        0.37 ±  2%  perf-profile.children.cycles-pp.lru_add_drain_cpu
      0.36 ±  2%      -0.0        0.33 ±  2%  perf-profile.children.cycles-pp.userfaultfd_unmap_complete
      0.21 ±  2%      -0.0        0.18 ±  2%  perf-profile.children.cycles-pp.__rb_insert_augmented
      0.11            -0.0        0.09 ±  4%  perf-profile.children.cycles-pp.__vma_link_file
      0.36 ±  2%      +0.0        0.38        perf-profile.children.cycles-pp.sync_mm_rss
      0.31 ±  3%      +0.0        0.34 ±  2%  perf-profile.children.cycles-pp.cap_capable
      0.68            +0.0        0.72 ±  2%  perf-profile.children.cycles-pp.vma_merge
      0.72            +0.0        0.77 ±  2%  perf-profile.children.cycles-pp.rcu_all_qs
      0.53            +0.1        0.59        perf-profile.children.cycles-pp.memcpy_erms
      0.93            +0.1        1.00        perf-profile.children.cycles-pp.vmacache_update
      1.41            +0.1        1.48        perf-profile.children.cycles-pp._cond_resched
      0.17 ±  4%      +0.1        0.24        perf-profile.children.cycles-pp.__x86_indirect_thunk_rax
      0.65            +0.1        0.73        perf-profile.children.cycles-pp.tlb_gather_mmu
      1.03            +0.1        1.12        perf-profile.children.cycles-pp.strlcpy
      0.12 ±  3%      +0.1        0.21 ±  2%  perf-profile.children.cycles-pp.tlb_table_flush
      0.38 ±  2%      +0.1        0.48        perf-profile.children.cycles-pp.free_pgd_range
      1.03            +0.1        1.15        perf-profile.children.cycles-pp.cap_vm_enough_memory
      0.84            +0.1        0.96        perf-profile.children.cycles-pp.__x86_retpoline_rax
      0.39            +0.1        0.51        perf-profile.children.cycles-pp.may_expand_vm
      0.39            +0.1        0.51        perf-profile.children.cycles-pp.tlb_flush_mmu
      1.20            +0.2        1.36        perf-profile.children.cycles-pp.__might_sleep
      2.45            +0.2        2.62        perf-profile.children.cycles-pp.___might_sleep
      1.18            +0.2        1.36        perf-profile.children.cycles-pp.tlb_finish_mmu
      8.14            +0.2        8.33        perf-profile.children.cycles-pp.perf_event_mmap
     11.49            +0.2       11.73        perf-profile.children.cycles-pp.syscall_return_via_sysret
      5.34            +0.2        5.59        perf-profile.children.cycles-pp.unmap_page_range
     11.38            +0.3       11.66        perf-profile.children.cycles-pp.entry_SYSCALL_64
      2.09            +0.3        2.41        perf-profile.children.cycles-pp.kmem_cache_alloc
      1.38            +0.4        1.75        perf-profile.children.cycles-pp.security_vm_enough_memory_mm
      1.41            +0.4        1.84        perf-profile.children.cycles-pp.arch_get_unmapped_area_topdown
      6.92            +0.4        7.36        perf-profile.children.cycles-pp.unmap_vmas
      3.54            +0.5        4.00        perf-profile.children.cycles-pp.vm_area_alloc
     10.72            +0.9       11.58        perf-profile.children.cycles-pp.unmap_region
      7.63            +0.9        8.56        perf-profile.children.cycles-pp.find_vma
      2.18            +1.0        3.18        perf-profile.children.cycles-pp.vmacache_find
      1.75 ±  2%      -1.0        0.77        perf-profile.self.cycles-pp.cap_mmap_addr
      3.48            -0.8        2.71        perf-profile.self.cycles-pp.__do_munmap
      0.89            -0.5        0.38        perf-profile.self.cycles-pp.security_mmap_addr
      0.64            -0.3        0.31 ±  2%  perf-profile.self.cycles-pp.userfaultfd_unmap_prep
     16.64            -0.3       16.33        perf-profile.self.cycles-pp.do_syscall_64
      0.80            -0.2        0.55 ±  2%  perf-profile.self.cycles-pp.__vma_rb_erase
      0.93 ±  2%      -0.2        0.72        perf-profile.self.cycles-pp.get_unmapped_area
      2.75            -0.2        2.56        perf-profile.self.cycles-pp.do_brk_flags
      4.61            -0.2        4.46        perf-profile.self.cycles-pp.find_vma
      0.39 ±  5%      -0.1        0.30        perf-profile.self.cycles-pp.__x86_retpoline_rbp
      1.21            -0.1        1.13        perf-profile.self.cycles-pp.__vma_link_rb
      0.25 ±  2%      -0.1        0.19        perf-profile.self.cycles-pp.__vm_enough_memory
      0.90            -0.1        0.84        perf-profile.self.cycles-pp.percpu_counter_add_batch
      0.41 ±  2%      -0.0        0.36 ±  2%  perf-profile.self.cycles-pp.unmap_single_vma
      0.43            -0.0        0.40        perf-profile.self.cycles-pp.vma_link
      0.38 ±  2%      -0.0        0.34 ±  3%  perf-profile.self.cycles-pp.fpregs_assert_state_consistent
      0.21 ±  2%      -0.0        0.18 ±  2%  perf-profile.self.cycles-pp.__vma_link_list
      0.21 ±  2%      -0.0        0.18        perf-profile.self.cycles-pp.__rb_insert_augmented
      0.34 ±  2%      -0.0        0.31 ±  2%  perf-profile.self.cycles-pp.userfaultfd_unmap_complete
      0.39 ±  2%      -0.0        0.36        perf-profile.self.cycles-pp.lru_add_drain_cpu
      0.76            -0.0        0.74        perf-profile.self.cycles-pp.kmem_cache_free
      0.40            -0.0        0.38        perf-profile.self.cycles-pp.up_write
      0.10            +0.0        0.11        perf-profile.self.cycles-pp.unlink_file_vma
      0.34 ±  2%      +0.0        0.35        perf-profile.self.cycles-pp.remove_vma
      0.47            +0.0        0.49        perf-profile.self.cycles-pp.strlcpy
      0.27            +0.0        0.30        perf-profile.self.cycles-pp.tlb_flush_mmu
      0.28 ±  3%      +0.0        0.31 ±  2%  perf-profile.self.cycles-pp.cap_capable
      0.66 ±  2%      +0.0        0.70        perf-profile.self.cycles-pp.vma_merge
      0.56 ±  2%      +0.0        0.61 ±  2%  perf-profile.self.cycles-pp.rcu_all_qs
      0.45            +0.0        0.49 ±  2%  perf-profile.self.cycles-pp.unmap_region
      2.02            +0.0        2.07        perf-profile.self.cycles-pp.perf_event_mmap_output
      0.78 ±  2%      +0.1        0.83 ±  2%  perf-profile.self.cycles-pp.tlb_finish_mmu
      0.74            +0.1        0.79        perf-profile.self.cycles-pp.__x86_retpoline_rax
      0.51            +0.1        0.57        perf-profile.self.cycles-pp.memcpy_erms
      0.21 ±  3%      +0.1        0.27 ±  3%  perf-profile.self.cycles-pp.security_vm_enough_memory_mm
      0.84            +0.1        0.90        perf-profile.self.cycles-pp.vmacache_update
      0.67            +0.1        0.73        perf-profile.self.cycles-pp.cap_vm_enough_memory
      0.10 ±  7%      +0.1        0.17 ±  2%  perf-profile.self.cycles-pp.__x86_indirect_thunk_rax
      0.55            +0.1        0.62        perf-profile.self.cycles-pp.unmap_vmas
      1.12            +0.1        1.20        perf-profile.self.cycles-pp.kmem_cache_alloc
      0.62            +0.1        0.72        perf-profile.self.cycles-pp.tlb_gather_mmu
      0.09 ±  4%      +0.1        0.19 ±  2%  perf-profile.self.cycles-pp.tlb_table_flush
      0.37            +0.1        0.47        perf-profile.self.cycles-pp.free_pgd_range
      0.37 ±  2%      +0.1        0.47        perf-profile.self.cycles-pp.may_expand_vm
      2.15            +0.1        2.26        perf-profile.self.cycles-pp.perf_event_mmap
      1.40            +0.1        1.55        perf-profile.self.cycles-pp.vm_area_alloc
      1.10            +0.2        1.25        perf-profile.self.cycles-pp.__might_sleep
      2.40            +0.2        2.57        perf-profile.self.cycles-pp.___might_sleep
      3.67            +0.2        3.85        perf-profile.self.cycles-pp.unmap_page_range
      2.48            +0.2        2.67        perf-profile.self.cycles-pp.__x64_sys_brk
     11.48            +0.2       11.72        perf-profile.self.cycles-pp.syscall_return_via_sysret
      9.95            +0.3       10.27        perf-profile.self.cycles-pp.entry_SYSCALL_64
      1.31            +0.4        1.72        perf-profile.self.cycles-pp.arch_get_unmapped_area_topdown
      2.01            +1.0        3.00        perf-profile.self.cycles-pp.vmacache_find


                                                                                
                            will-it-scale.per_process_ops                       
                                                                                
  900000 +------------------------------------------------------------------+   
         |   :  :     O O        O O : O :    :   :     :  :                |   
  800000 |-+ :  :                    :   :    :   :     :  :                |   
  700000 |-+ :  :                    :   :    :   :     :  :                |   
         |    : :                     : :      : :      : :                 |   
  600000 |-+  : :                     : :      : :      : :                 |   
  500000 |-+  : :                     : :      : :      : :                 |   
         |    : :                     : :      : :       ::                 |   
  400000 |-+  ::                      : :      : :       ::                 |   
  300000 |-+  ::                      : :      : :       ::                 |   
         |    ::                      : :      : :       ::                 |   
  200000 |-+   :                       :        :        :                  |   
  100000 |-+   :                       :        :        :                  |   
         |     :                       :        :        :                  |   
       0 +------------------------------------------------------------------+   
                                                                                
                                                                                                                                                                
                               will-it-scale.workload                           
                                                                                
  1e+08 +-------------------------------------------------------------------+   
  9e+07 |.+.+ O ++.+.+.+.+.+.+.+.++.+ O +.+.+.+ O ++.+.+   +.+.+.+.++.+.+.+.|   
        |   :   :                   :   :     :   :    :   :                |   
  8e+07 |-+ :   :                   :   :     :   :    :   :                |   
  7e+07 |-+ :   :                   :   :     :   :    :   :                |   
        |    : :                     : :       : :      : :                 |   
  6e+07 |-+  : :                     : :       : :      : :                 |   
  5e+07 |-+  : :                     : :       : :      : :                 |   
  4e+07 |-+  : :                     : :       : :      : :                 |   
        |    : :                     : :       : :      : :                 |   
  3e+07 |-+  : :                     : :       : :      : :                 |   
  2e+07 |-+   :                       :         :        :                  |   
        |     :                       :         :        :                  |   
  1e+07 |-+   :                       :         :        :                  |   
      0 +-------------------------------------------------------------------+   
                                                                                
                                                                                
[*] 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


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