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    SubjectRe: [PATCH 0/6] Reduce compaction scanning and lock contention
    Richard Davies wrote:
    > I did manage to get a couple which were slightly worse, but nothing like as
    > bad as before. Here are the results:
    ...
    > # grep -F '[k]' report | head -8
    > 61.29% qemu-kvm [kernel.kallsyms] [k] clear_page_c
    > 4.52% qemu-kvm [kernel.kallsyms] [k] _raw_spin_lock_irqsave
    > 2.64% qemu-kvm [kernel.kallsyms] [k] copy_page_c
    > 1.61% swapper [kernel.kallsyms] [k] default_idle
    > 1.57% qemu-kvm [kernel.kallsyms] [k] _raw_spin_lock
    > 1.18% qemu-kvm [kernel.kallsyms] [k] get_page_from_freelist
    > 1.18% qemu-kvm [kernel.kallsyms] [k] isolate_freepages_block
    > 1.11% qemu-kvm [kernel.kallsyms] [k] svm_vcpu_run

    # ========
    # captured on: Fri Sep 21 08:40:48 2012
    # os release : 3.6.0-rc5-elastic+
    # perf version : 3.5.2
    # arch : x86_64
    # nrcpus online : 16
    # nrcpus avail : 16
    # cpudesc : AMD Opteron(tm) Processor 6128
    # cpuid : AuthenticAMD,16,9,1
    # total memory : 131973276 kB
    # cmdline : /home/root/bin/perf record -g -a
    # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112 }
    # HEADER_CPU_TOPOLOGY info available, use -I to display
    # HEADER_NUMA_TOPOLOGY info available, use -I to display
    # ========
    #
    # Samples: 914K of event 'cycles'
    # Event count (approx.): 328377288871
    #
    # Overhead Command Shared Object Symbol
    # ........ ............. .................... ..............................................
    #
    61.29% qemu-kvm [kernel.kallsyms] [k] clear_page_c
    |
    --- clear_page_c
    |
    |--98.26%-- do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--67.45%-- 0x10100000006
    | |
    | --32.55%-- 0x10100000002
    |
    --1.74%-- __alloc_pages_nodemask
    |
    |--91.69%-- alloc_pages_vma
    | handle_pte_fault
    | |
    | |--99.76%-- handle_mm_fault
    | | |
    | | |--99.78%-- __get_user_pages
    | | | get_user_page_nowait
    | | | hva_to_pfn.isra.17
    | | | __gfn_to_pfn
    | | | gfn_to_pfn_async
    | | | try_async_pf
    | | | tdp_page_fault
    | | | kvm_mmu_page_fault
    | | | pf_interception
    | | | handle_exit
    | | | kvm_arch_vcpu_ioctl_run
    | | | kvm_vcpu_ioctl
    | | | do_vfs_ioctl
    | | | sys_ioctl
    | | | system_call_fastpath
    | | | ioctl
    | | | |
    | | | |--98.56%-- 0x10100000006
    | | | |
    | | | --1.44%-- 0x10100000002
    | | --0.22%-- [...]
    | --0.24%-- [...]
    |
    --8.31%-- alloc_pages_current
    |
    |--99.43%-- pte_alloc_one
    | |
    | |--97.72%-- do_huge_pmd_anonymous_page
    | | handle_mm_fault
    | | __get_user_pages
    | | get_user_page_nowait
    | | hva_to_pfn.isra.17
    | | __gfn_to_pfn
    | | gfn_to_pfn_async
    | | try_async_pf
    | | tdp_page_fault
    | | kvm_mmu_page_fault
    | | pf_interception
    | | handle_exit
    | | kvm_arch_vcpu_ioctl_run
    | | kvm_vcpu_ioctl
    | | do_vfs_ioctl
    | | sys_ioctl
    | | system_call_fastpath
    | | ioctl
    | | |
    | | |--56.04%-- 0x10100000006
    | | |
    | | --43.96%-- 0x10100000002
    | |
    | --2.28%-- __pte_alloc
    | do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | 0x10100000006
    --0.57%-- [...]
    4.52% qemu-kvm [kernel.kallsyms] [k] _raw_spin_lock_irqsave
    |
    --- _raw_spin_lock_irqsave
    |
    |--90.15%-- compact_checklock_irqsave
    | |
    | |--99.77%-- isolate_migratepages_range
    | | compact_zone
    | | compact_zone_order
    | | try_to_compact_pages
    | | __alloc_pages_direct_compact
    | | __alloc_pages_nodemask
    | | alloc_pages_vma
    | | do_huge_pmd_anonymous_page
    | | handle_mm_fault
    | | __get_user_pages
    | | get_user_page_nowait
    | | hva_to_pfn.isra.17
    | | __gfn_to_pfn
    | | gfn_to_pfn_async
    | | try_async_pf
    | | tdp_page_fault
    | | kvm_mmu_page_fault
    | | pf_interception
    | | handle_exit
    | | kvm_arch_vcpu_ioctl_run
    | | kvm_vcpu_ioctl
    | | do_vfs_ioctl
    | | sys_ioctl
    | | system_call_fastpath
    | | ioctl
    | | |
    | | |--94.58%-- 0x10100000006
    | | |
    | | --5.42%-- 0x10100000002
    | --0.23%-- [...]
    |
    |--3.60%-- isolate_migratepages_range
    | compact_zone
    | compact_zone_order
    | try_to_compact_pages
    | __alloc_pages_direct_compact
    | __alloc_pages_nodemask
    | alloc_pages_vma
    | do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--91.30%-- 0x10100000006
    | |
    | --8.70%-- 0x10100000002
    |
    |--2.26%-- pagevec_lru_move_fn
    | __pagevec_lru_add
    | |
    | |--96.55%-- __lru_cache_add
    | | lru_cache_add_lru
    | | |
    | | |--96.23%-- putback_lru_page
    | | | |
    | | | |--98.46%-- migrate_pages
    | | | | compact_zone
    | | | | compact_zone_order
    | | | | try_to_compact_pages
    | | | | __alloc_pages_direct_compact
    | | | | __alloc_pages_nodemask
    | | | | alloc_pages_vma
    | | | | do_huge_pmd_anonymous_page
    | | | | handle_mm_fault
    | | | | __get_user_pages
    | | | | get_user_page_nowait
    | | | | hva_to_pfn.isra.17
    | | | | __gfn_to_pfn
    | | | | gfn_to_pfn_async
    | | | | try_async_pf
    | | | | tdp_page_fault
    | | | | kvm_mmu_page_fault
    | | | | pf_interception
    | | | | handle_exit
    | | | | kvm_arch_vcpu_ioctl_run
    | | | | kvm_vcpu_ioctl
    | | | | do_vfs_ioctl
    | | | | sys_ioctl
    | | | | system_call_fastpath
    | | | | ioctl
    | | | | |
    | | | | |--91.70%-- 0x10100000006
    | | | | |
    | | | | --8.30%-- 0x10100000002
    | | | |
    | | | --1.54%-- putback_lru_pages
    | | | compact_zone
    | | | compact_zone_order
    | | | try_to_compact_pages
    | | | __alloc_pages_direct_compact
    | | | __alloc_pages_nodemask
    | | | alloc_pages_vma
    | | | do_huge_pmd_anonymous_page
    | | | handle_mm_fault
    | | | __get_user_pages
    | | | get_user_page_nowait
    | | | hva_to_pfn.isra.17
    | | | __gfn_to_pfn
    | | | gfn_to_pfn_async
    | | | try_async_pf
    | | | tdp_page_fault
    | | | kvm_mmu_page_fault
    | | | pf_interception
    | | | handle_exit
    | | | kvm_arch_vcpu_ioctl_run
    | | | kvm_vcpu_ioctl
    | | | do_vfs_ioctl
    | | | sys_ioctl
    | | | system_call_fastpath
    | | | ioctl
    | | | 0x10100000006
    | | |
    | | --3.77%-- page_add_new_anon_rmap
    | | handle_pte_fault
    | | handle_mm_fault
    | | __get_user_pages
    | | get_user_page_nowait
    | | hva_to_pfn.isra.17
    | | __gfn_to_pfn
    | | gfn_to_pfn_async
    | | try_async_pf
    | | tdp_page_fault
    | | kvm_mmu_page_fault
    | | pf_interception
    | | handle_exit
    | | kvm_arch_vcpu_ioctl_run
    | | kvm_vcpu_ioctl
    | | do_vfs_ioctl
    | | sys_ioctl
    | | system_call_fastpath
    | | ioctl
    | | |
    | | |--97.54%-- 0x10100000006
    | | |
    | | --2.46%-- 0x10100000002
    | |
    | --3.45%-- lru_add_drain_cpu
    | lru_add_drain
    | migrate_prep_local
    | compact_zone
    | compact_zone_order
    | try_to_compact_pages
    | __alloc_pages_direct_compact
    | __alloc_pages_nodemask
    | alloc_pages_vma
    | do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | 0x10100000006
    |
    |--1.58%-- release_pages
    | pagevec_lru_move_fn
    | __pagevec_lru_add
    | |
    | |--98.25%-- __lru_cache_add
    | | lru_cache_add_lru
    | | putback_lru_page
    | | |
    | | |--99.42%-- migrate_pages
    | | | compact_zone
    | | | compact_zone_order
    | | | try_to_compact_pages
    | | | __alloc_pages_direct_compact
    | | | __alloc_pages_nodemask
    | | | alloc_pages_vma
    | | | do_huge_pmd_anonymous_page
    | | | handle_mm_fault
    | | | __get_user_pages
    | | | get_user_page_nowait
    | | | hva_to_pfn.isra.17
    | | | __gfn_to_pfn
    | | | gfn_to_pfn_async
    | | | try_async_pf
    | | | tdp_page_fault
    | | | kvm_mmu_page_fault
    | | | pf_interception
    | | | handle_exit
    | | | kvm_arch_vcpu_ioctl_run
    | | | kvm_vcpu_ioctl
    | | | do_vfs_ioctl
    | | | sys_ioctl
    | | | system_call_fastpath
    | | | ioctl
    | | | |
    | | | |--95.23%-- 0x10100000006
    | | | |
    | | | --4.77%-- 0x10100000002
    | | |
    | | --0.58%-- putback_lru_pages
    | | compact_zone
    | | compact_zone_order
    | | try_to_compact_pages
    | | __alloc_pages_direct_compact
    | | __alloc_pages_nodemask
    | | alloc_pages_vma
    | | do_huge_pmd_anonymous_page
    | | handle_mm_fault
    | | __get_user_pages
    | | get_user_page_nowait
    | | hva_to_pfn.isra.17
    | | __gfn_to_pfn
    | | gfn_to_pfn_async
    | | try_async_pf
    | | tdp_page_fault
    | | kvm_mmu_page_fault
    | | pf_interception
    | | handle_exit
    | | kvm_arch_vcpu_ioctl_run
    | | kvm_vcpu_ioctl
    | | do_vfs_ioctl
    | | sys_ioctl
    | | system_call_fastpath
    | | ioctl
    | | 0x10100000006
    | |
    | --1.75%-- lru_add_drain_cpu
    | lru_add_drain
    | migrate_prep_local
    | compact_zone
    | compact_zone_order
    | try_to_compact_pages
    | __alloc_pages_direct_compact
    | __alloc_pages_nodemask
    | alloc_pages_vma
    | do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--80.09%-- 0x10100000006
    | |
    | --19.91%-- 0x10100000002
    |
    |--0.99%-- __page_cache_release.part.11
    | __put_single_page
    | put_page
    | putback_lru_page
    | migrate_pages
    | compact_zone
    | compact_zone_order
    | try_to_compact_pages
    | __alloc_pages_direct_compact
    | __alloc_pages_nodemask
    | alloc_pages_vma
    | do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--92.20%-- 0x10100000006
    | |
    | --7.80%-- 0x10100000002
    --1.42%-- [...]
    2.64% qemu-kvm [kernel.kallsyms] [k] copy_page_c
    |
    --- copy_page_c
    |
    |--75.79%-- buffer_migrate_page
    | move_to_new_page
    | migrate_pages
    | compact_zone
    | compact_zone_order
    | try_to_compact_pages
    | __alloc_pages_direct_compact
    | __alloc_pages_nodemask
    | alloc_pages_vma
    | do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--98.86%-- 0x10100000006
    | |
    | --1.14%-- 0x10100000002
    |
    |--24.08%-- migrate_page
    | |
    | |--82.12%-- buffer_migrate_page
    | | move_to_new_page
    | | migrate_pages
    | | compact_zone
    | | compact_zone_order
    | | try_to_compact_pages
    | | __alloc_pages_direct_compact
    | | __alloc_pages_nodemask
    | | alloc_pages_vma
    | | do_huge_pmd_anonymous_page
    | | handle_mm_fault
    | | __get_user_pages
    | | get_user_page_nowait
    | | hva_to_pfn.isra.17
    | | __gfn_to_pfn
    | | gfn_to_pfn_async
    | | try_async_pf
    | | tdp_page_fault
    | | kvm_mmu_page_fault
    | | pf_interception
    | | handle_exit
    | | kvm_arch_vcpu_ioctl_run
    | | kvm_vcpu_ioctl
    | | do_vfs_ioctl
    | | sys_ioctl
    | | system_call_fastpath
    | | ioctl
    | | |
    | | |--98.08%-- 0x10100000006
    | | |
    | | --1.92%-- 0x10100000002
    | |
    | --17.88%-- move_to_new_page
    | migrate_pages
    | compact_zone
    | compact_zone_order
    | try_to_compact_pages
    | __alloc_pages_direct_compact
    | __alloc_pages_nodemask
    | alloc_pages_vma
    | do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--99.21%-- 0x10100000006
    | |
    | --0.79%-- 0x10100000002
    --0.13%-- [...]
    1.61% swapper [kernel.kallsyms] [k] default_idle
    |
    --- default_idle
    |
    |--99.76%-- cpu_idle
    | |
    | |--77.77%-- start_secondary
    | |
    | --22.23%-- rest_init
    | start_kernel
    | x86_64_start_reservations
    | x86_64_start_kernel
    --0.24%-- [...]
    1.57% qemu-kvm [kernel.kallsyms] [k] _raw_spin_lock
    |
    --- _raw_spin_lock
    |
    |--37.29%-- tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--89.54%-- 0x10100000006
    | |
    | --10.46%-- 0x10100000002
    |
    |--9.09%-- kvm_mmu_load
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--59.75%-- 0x10100000006
    | |
    | --40.25%-- 0x10100000002
    |
    |--8.00%-- follow_page
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--98.39%-- 0x10100000006
    | |
    | --1.61%-- 0x10100000002
    |
    |--7.17%-- kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--94.45%-- 0x10100000006
    | |
    | --5.55%-- 0x10100000002
    |
    |--5.65%-- mmu_free_roots
    | |
    | |--76.51%-- nonpaging_free
    | | kvm_mmu_reset_context
    | | kvm_set_cr4
    | | emulator_set_cr
    | | em_cr_write
    | | x86_emulate_insn
    | | x86_emulate_instruction
    | | emulate_on_interception
    | | cr_interception
    | | handle_exit
    | | kvm_arch_vcpu_ioctl_run
    | | kvm_vcpu_ioctl
    | | do_vfs_ioctl
    | | sys_ioctl
    | | system_call_fastpath
    | | ioctl
    | | |
    | | |--64.15%-- 0x10100000006
    | | |
    | | --35.85%-- 0x10100000002
    | |
    | --23.49%-- kvm_mmu_unload
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--73.65%-- 0x10100000006
    | |
    | --26.35%-- 0x10100000002
    |
    |--4.61%-- put_super
    | drop_super
    | prune_super
    | shrink_slab
    | try_to_free_pages
    | __alloc_pages_nodemask
    | alloc_pages_vma
    | do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--93.31%-- 0x10100000006
    | |
    | --6.69%-- 0x10100000002
    |
    |--4.60%-- grab_super_passive
    | prune_super
    | shrink_slab
    | try_to_free_pages
    | __alloc_pages_nodemask
    | alloc_pages_vma
    | do_huge_pmd_anonymous_page
    | handle_mm_fault
    | __get_user_pages
    | get_user_page_nowait
    | hva_to_pfn.isra.17
    | __gfn_to_pfn
    | gfn_to_pfn_async
    | try_async_pf
    | tdp_page_fault
    | kvm_mmu_page_fault
    | pf_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--95.07%-- 0x10100000006
    | |
    | --4.93%-- 0x10100000002
    |
    |--3.94%-- yield_to
    | kvm_vcpu_yield_to
    | kvm_vcpu_on_spin
    | pause_interception
    | handle_exit
    | kvm_arch_vcpu_ioctl_run
    | kvm_vcpu_ioctl
    | do_vfs_ioctl
    | sys_ioctl
    | system_call_fastpath
    | ioctl
    | |
    | |--86.93%-- 0x10100000006
    | |
    | --13.07%-- 0x10100000002
    |
    |--3.08%-- free_pcppages_bulk
    | |
    | |--89.90%-- drain_pages
    | | |
    | | |--95.03%-- drain_local_pages
    | | | generic_smp_call_function_interrupt
    | | | smp_call_function_interrupt
    | | | call_function_interrupt
    | | | |
    | | | |--29.99%-- buffer_migrate_page
    | | | | move_to_new_page
    | | | | migrate_pages
    | | | | compact_zone
    | | | | compact_zone_order
    | | | | try_to_compact_pages
    | | | | __alloc_pages_direct_compact
    | | | | __alloc_pages_nodemask
    | | | | alloc_pages_vma
    | | | | do_huge_pmd_anonymous_page
    | | | | handle_mm_fault
    | | | | __get_user_pages
    | | | | get_user_page_nowait
    | | | | hva_to_pfn.isra.17
    | | | | __gfn_to_pfn
    | | | | gfn_to_pfn_async
    | | | | try_async_pf
    | | | | tdp_page_fault
    | | | | kvm_mmu_page_fault
    | | | | pf_interception
    | | | | handle_exit
    | | | | kvm_arch_vcpu_ioctl_run
    | | | | kvm_vcpu_ioctl
    | | | | do_vfs_ioctl
    | | | | sys_ioctl
    | | | | system_call_fastpath
    | | | | ioctl
    | | | | 0x10100000006
    | | | |
    | | | |--13.18%-- kvm_vcpu_ioctl
    | | | | do_vfs_ioctl
    | | | | sys_ioctl
    | | | | system_call_fastpath
    | | | | ioctl
    | | | | |
    | | | | |--98.30%-- 0x10100000006
    | | | | |
    | | | | --1.70%-- 0x10100000002
    | | | |
    | | | |--8.86%-- compact_checklock_irqsave
    | | | | |
    | | | | |--65.32%-- isolate_migratepages_range
    | | | | | compact_zone
    | | | | | compact_zone_order
    | | | | | try_to_compact_pages
    | | | | | __alloc_pages_direct_compact
    | | | | | __alloc_pages_nodemask
    | | | | | alloc_pages_vma
    | | | | | do_huge_pmd_anonymous_page
    | | | | | handle_mm_fault
    | | | | | __get_user_pages
    | | | | | get_user_page_nowait
    | | | | | hva_to_pfn.isra.17
    | | | | | __gfn_to_pfn
    | | | | | gfn_to_pfn_async
    | | | | | try_async_pf
    | | | | | tdp_page_fault
    | | | | | kvm_mmu_page_fault
    | | | | | pf_interception
    | | | | | handle_exit
    | | | | | kvm_arch_vcpu_ioctl_run
    | | | | | kvm_vcpu_ioctl
    | | | | | do_vfs_ioctl
    | | | | | sys_ioctl
    | | | | | system_call_fastpath
    | | | | | ioctl
    | | | | | |
    | | | | | |--94.13%-- 0x10100000006
    | | | | | |
    | | | | | --5.87%-- 0x10100000002
    | | | | |
    | | | | --34.68%-- isolate_freepages_block
    | | | | compaction_alloc
    | | | | migrate_pages
    | | | | compact_zone
    | | | | compact_zone_order
    | | | | try_to_compact_pages
    | | | | __alloc_pages_direct_compact
    | | | | __alloc_pages_nodemask
    | | | | alloc_pages_vma
    | | | | do_huge_pmd_anonymous_page
    | | | | handle_mm_fault
    | | | | __get_user_pages
    | | | | get_user_page_nowait
    | | | | hva_to_pfn.isra.17
    | | | | __gfn_to_pfn
    | | | | gfn_to_pfn_async
    | | | | try_async_pf
    | | | | tdp_page_fault
    | | | | kvm_mmu_page_fault
    | | | | pf_interception
    | | | | handle_exit
    | | | | kvm_arch_vcpu_ioctl_run
    | | | | kvm_vcpu_ioctl
    | | | | do_vfs_ioctl
    | | | | sys_ioctl
    | | | | system_call_fastpath
    | | | | ioctl
    | | | | 0x10100000006
    | | | |
    | | | |--8.21%-- migrate_page
    | | | | |
    | | | | |--91.65%-- buffer_migrate_page
    | | | | | move_to_new_page
    | | | | | migrate_pages
    | | | | | compact_zone
    | | | | | compact_zone_order
    | | | | | try_to_compact_pages
    | | | | | __alloc_pages_direct_compact
    | | | | | __alloc_pages_nodemask
    | | | | | alloc_pages_vma
    | | | | | do_huge_pmd_anonymous_page
    | | | | | handle_mm_fault
    | | | | | __get_user_pages
    | | | | | get_user_page_nowait
    | | | | | hva_to_pfn.isra.17
    | | | | | __gfn_to_pfn
    | | | | | gfn_to_pfn_async
    | | | | | try_async_pf
    | | | | | tdp_page_fault
    | | | | | kvm_mmu_page_fault
    | | | | | pf_interception
    | | | | | handle_exit
    | | | | | kvm_arch_vcpu_ioctl_run
    | | | | | kvm_vcpu_ioctl
    | | | | | do_vfs_ioctl
    | | | | | sys_ioctl
    | | | | | system_call_fastpath
    | | | | | ioctl
    | | | | | 0x10100000006
    | | | | |
    | | | | --8.35%-- move_to_new_page
    | | | | migrate_pages
    | | | | compact_zone
    | | | | compact_zone_order
    | | | | try_to_compact_pages
    | | | | __alloc_pages_direct_compact
    | | | | __alloc_pages_nodemask
    | | | | alloc_pages_vma
    | | | | do_huge_pmd_anonymous_page
    | | | | handle_mm_fault
    | | | | __get_user_pages
    | | | | get_user_page_nowait
    | | | | hva_to_pfn.isra.17
    | | | | __gfn_to_pfn
    | | | | gfn_to_pfn_async
    | | | | try_async_pf
    | | | | tdp_page_fault
    | | | | kvm_mmu_page_fault
    | | | | pf_interception
    | | | | handle_exit
    | | | | kvm_arch_vcpu_ioctl_run
    | | | | kvm_vcpu_ioctl
    | | | | do_vfs_ioctl
    | | | | sys_ioctl
    | | | | system_call_fastpath
    | | | | ioctl
    | | | | 0x10100000006
    | | | |
    | | | |--6.16%-- do_huge_pmd_anonymous_page
    | | | | handle_mm_fault
    | | | | __get_user_pages
    | | | | get_user_page_nowait
    | | | | hva_to_pfn.isra.17
    | | | | __gfn_to_pfn
    | | | | gfn_to_pfn_async
    | | | | try_async_pf
    | | | | tdp_page_fault
    | | | | kvm_mmu_page_fault
    | | | | pf_interception
    | | | | handle_exit
    | | | | kvm_arch_vcpu_ioctl_run
    | | | | kvm_vcpu_ioctl
    | | | | do_vfs_ioctl
    | | | | sys_ioctl
    | | | | system_call_fastpath
    | | | | ioctl
    | | | | 0x10100000006
    | | | |
    | | | |--5.39%-- isolate_migratepages_range
    | | | | compact_zone
    | | | | compact_zone_order
    | | | | try_to_compact_pages
    | | | | __alloc_pages_direct_compact
    | | | | __alloc_pages_nodemask
    | | | | alloc_pages_vma
    | | | | do_huge_pmd_anonymous_page
    | | | | handle_mm_fault
    | | | | __get_user_pages
    | | | | get_user_page_nowait
    | | | | hva_to_pfn.isra.17
    | | | | __gfn_to_pfn
    | | | | gfn_to_pfn_async
    | | | | try_async_pf
    | | | | tdp_page_fault
    | | | | kvm_mmu_page_fault
    | | | | pf_interception
    | | | | handle_exit
    | | | | kvm_arch_vcpu_ioctl_run
    | | | | kvm_vcpu_ioctl
    | | | | do_vfs_ioctl
    | | | | sys_ioctl
    | | | | system_call_fastpath
    | | | | ioctl
    | | | | 0x10100000006
    | | | |
    | | | |--3.59%-- compaction_alloc
    | | | | migrate_pages
    | | | | compact_zone
    | | | | compact_zone_order
    | | | | try_to_compact_pages
    | | | | __alloc_pages_direct_compact
    | | | | __alloc_pages_nodemask
    | | | | alloc_pages_vma
    | | | | do_huge_pmd_anonymous_page
    | | | | handle_mm_fault
    | | | | __get_user_pages
    | | | | get_user_page_nowait
    | | | | hva_to_pfn.isra.17
    | | | | __gfn_to_pfn
    | | | | gfn_to_pfn_async
    | | | | try_async_pf
    | | | | tdp_page_fault
    | | | | kvm_mmu_page_fault
    | | | | pf_interception
    | | | | handle_exit
    | | | | kvm_arch_vcpu_ioctl_run
    | | | | kvm_vcpu_ioctl
    | | | | do_vfs_ioctl
    | | | | sys_ioctl
    | | | | system_call_fastpath
    | | | | ioctl
    | | | | 0x10100000006
    | | | |
    | | | |--3.19%-- migrate_page_move_mapping.part.16
    | | | | |
    | | | | |--89.86%-- buffer_migrate_page
    | | | | | move_to_new_page
    | | | | | migrate_pages
    | | | | | compact_zone
    | | | | | compact_zone_order
    | | | | | try_to_compact_pages
    | | | | | __alloc_pages_direct_compact
    | | | | | __alloc_pages_nodemask
    | | | | | alloc_pages_vma
    | | | | | do_huge_pmd_anonymous_page
    | | | | | handle_mm_fault
    | | | | | __get_user_pages
    | | | | | get_user_page_nowait
    | | | | | hva_to_pfn.isra.17
    | | | | | __gfn_to_pfn
    | | | | | gfn_to_pfn_async
    | | | | | try_async_pf
    | | | | | tdp_page_fault
    | | | | | kvm_mmu_page_fault
    | | | | | pf_interception


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      Last update: 2012-09-21 12:21    [W:2.533 / U:0.256 seconds]
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