Re: [LKP] [lkp-robot] [brd] 316ba5736c: aim7.jobs-per-min -11.2% regression
From: kemi
Date: Tue Dec 18 2018 - 04:16:00 EST
Hi, All
Do we have special reason to keep this patch (316ba5736c9:brd: Mark as non-rotational).
which leads to a performance regression when BRD is used as a disk on btrfs.
On 2018/7/10 äå1:27, kemi wrote:
> Hi, SeongJae
> Do you have any input for this regression? thanks
>
> On 2018å06æ04æ 13:52, kernel test robot wrote:
>>
>> Greeting,
>>
>> FYI, we noticed a -11.2% regression of aim7.jobs-per-min due to commit:
>>
>>
>> commit: 316ba5736c9caa5dbcd84085989862d2df57431d ("brd: Mark as non-rotational")
>> https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-4.18/block
>>
>> in testcase: aim7
>> on test machine: 40 threads Intel(R) Xeon(R) CPU E5-2690 v2 @ 3.00GHz with 384G memory
>> with following parameters:
>>
>> disk: 1BRD_48G
>> fs: btrfs
>> test: disk_rw
>> load: 1500
>> cpufreq_governor: performance
>>
>> test-description: AIM7 is a traditional UNIX system level benchmark suite which is used to test and measure the performance of multiuser system.
>> test-url: https://sourceforge.net/projects/aimbench/files/aim-suite7/
>>
>>
>>
>> Details are as below:
>> -------------------------------------------------------------------------------------------------->
>>
>> =========================================================================================
>> compiler/cpufreq_governor/disk/fs/kconfig/load/rootfs/tbox_group/test/testcase:
>> gcc-7/performance/1BRD_48G/btrfs/x86_64-rhel-7.2/1500/debian-x86_64-2016-08-31.cgz/lkp-ivb-ep01/disk_rw/aim7
>>
>> commit:
>> 522a777566 ("block: consolidate struct request timestamp fields")
>> 316ba5736c ("brd: Mark as non-rotational")
>>
>> 522a777566f56696 316ba5736c9caa5dbcd8408598
>> ---------------- --------------------------
>> %stddev %change %stddev
>> \ | \
>> 28321 -11.2% 25147 aim7.jobs-per-min
>> 318.19 +12.6% 358.23 aim7.time.elapsed_time
>> 318.19 +12.6% 358.23 aim7.time.elapsed_time.max
>> 1437526 Â 2% +14.6% 1646849 Â 2% aim7.time.involuntary_context_switches
>> 11986 +14.2% 13691 aim7.time.system_time
>> 73.06 Â 2% -3.6% 70.43 aim7.time.user_time
>> 2449470 Â 2% -25.0% 1837521 Â 4% aim7.time.voluntary_context_switches
>> 20.25 Â 58% +1681.5% 360.75 Â109% numa-meminfo.node1.Mlocked
>> 456062 -16.3% 381859 softirqs.SCHED
>> 9015 Â 7% -21.3% 7098 Â 22% meminfo.CmaFree
>> 47.50 Â 58% +1355.8% 691.50 Â 92% meminfo.Mlocked
>> 5.24 Â 3% -1.2 3.99 Â 2% mpstat.cpu.idle%
>> 0.61 Â 2% -0.1 0.52 Â 2% mpstat.cpu.usr%
>> 16627 +12.8% 18762 Â 4% slabinfo.Acpi-State.active_objs
>> 16627 +12.9% 18775 Â 4% slabinfo.Acpi-State.num_objs
>> 57.00 Â 2% +17.5% 67.00 vmstat.procs.r
>> 20936 -24.8% 15752 Â 2% vmstat.system.cs
>> 45474 -1.7% 44681 vmstat.system.in
>> 6.50 Â 59% +1157.7% 81.75 Â 75% numa-vmstat.node0.nr_mlock
>> 242870 Â 3% +13.2% 274913 Â 7% numa-vmstat.node0.nr_written
>> 2278 Â 7% -22.6% 1763 Â 21% numa-vmstat.node1.nr_free_cma
>> 4.75 Â 58% +1789.5% 89.75 Â109% numa-vmstat.node1.nr_mlock
>> 88018135 Â 3% -48.9% 44980457 Â 7% cpuidle.C1.time
>> 1398288 Â 3% -51.1% 683493 Â 9% cpuidle.C1.usage
>> 3499814 Â 2% -38.5% 2153158 Â 5% cpuidle.C1E.time
>> 52722 Â 4% -45.6% 28692 Â 6% cpuidle.C1E.usage
>> 9865857 Â 3% -40.1% 5905155 Â 5% cpuidle.C3.time
>> 69656 Â 2% -42.6% 39990 Â 5% cpuidle.C3.usage
>> 590856 Â 2% -12.3% 517910 cpuidle.C6.usage
>> 46160 Â 7% -53.7% 21372 Â 11% cpuidle.POLL.time
>> 1716 Â 7% -46.6% 916.25 Â 14% cpuidle.POLL.usage
>> 197656 +4.1% 205732 proc-vmstat.nr_active_file
>> 191867 +4.1% 199647 proc-vmstat.nr_dirty
>> 509282 +1.6% 517318 proc-vmstat.nr_file_pages
>> 2282 Â 8% -24.4% 1725 Â 22% proc-vmstat.nr_free_cma
>> 357.50 +10.6% 395.25 Â 2% proc-vmstat.nr_inactive_file
>> 11.50 Â 58% +1397.8% 172.25 Â 93% proc-vmstat.nr_mlock
>> 970355 Â 4% +14.6% 1111549 Â 8% proc-vmstat.nr_written
>> 197984 +4.1% 206034 proc-vmstat.nr_zone_active_file
>> 357.50 +10.6% 395.25 Â 2% proc-vmstat.nr_zone_inactive_file
>> 192282 +4.1% 200126 proc-vmstat.nr_zone_write_pending
>> 7901465 Â 3% -14.0% 6795016 Â 16% proc-vmstat.pgalloc_movable
>> 886101 +10.2% 976329 proc-vmstat.pgfault
>> 2.169e+12 +15.2% 2.497e+12 perf-stat.branch-instructions
>> 0.41 -0.1 0.35 perf-stat.branch-miss-rate%
>> 31.19 Â 2% +1.6 32.82 perf-stat.cache-miss-rate%
>> 9.116e+09 +8.3% 9.869e+09 perf-stat.cache-misses
>> 2.924e+10 +2.9% 3.008e+10 Â 2% perf-stat.cache-references
>> 6712739 Â 2% -15.4% 5678643 Â 2% perf-stat.context-switches
>> 4.02 +2.7% 4.13 perf-stat.cpi
>> 3.761e+13 +17.3% 4.413e+13 perf-stat.cpu-cycles
>> 606958 -13.7% 523758 Â 2% perf-stat.cpu-migrations
>> 2.476e+12 +13.4% 2.809e+12 perf-stat.dTLB-loads
>> 0.18 Â 2% -0.0 0.16 Â 9% perf-stat.dTLB-store-miss-rate%
>> 1.079e+09 Â 2% -9.6% 9.755e+08 Â 9% perf-stat.dTLB-store-misses
>> 5.933e+11 +1.6% 6.029e+11 perf-stat.dTLB-stores
>> 9.349e+12 +14.2% 1.068e+13 perf-stat.instructions
>> 11247 Â 11% +19.8% 13477 Â 9% perf-stat.instructions-per-iTLB-miss
>> 0.25 -2.6% 0.24 perf-stat.ipc
>> 865561 +10.3% 954350 perf-stat.minor-faults
>> 2.901e+09 Â 3% +9.8% 3.186e+09 Â 3% perf-stat.node-load-misses
>> 3.682e+09 Â 3% +11.0% 4.088e+09 Â 3% perf-stat.node-loads
>> 3.778e+09 +4.8% 3.959e+09 Â 2% perf-stat.node-store-misses
>> 5.079e+09 +6.4% 5.402e+09 perf-stat.node-stores
>> 865565 +10.3% 954352 perf-stat.page-faults
>> 51.75 Â 5% -12.5% 45.30 Â 10% sched_debug.cfs_rq:/.load_avg.avg
>> 316.35 Â 3% +17.2% 370.81 Â 8% sched_debug.cfs_rq:/.util_est_enqueued.stddev
>> 15294 Â 30% +234.9% 51219 Â 76% sched_debug.cpu.avg_idle.min
>> 299443 Â 3% -7.3% 277566 Â 5% sched_debug.cpu.avg_idle.stddev
>> 1182 Â 19% -26.3% 872.02 Â 13% sched_debug.cpu.nr_load_updates.stddev
>> 1.22 Â 8% +21.7% 1.48 Â 6% sched_debug.cpu.nr_running.avg
>> 2.75 Â 10% +26.2% 3.47 Â 6% sched_debug.cpu.nr_running.max
>> 0.58 Â 7% +24.2% 0.73 Â 6% sched_debug.cpu.nr_running.stddev
>> 77148 -20.0% 61702 Â 7% sched_debug.cpu.nr_switches.avg
>> 70024 -24.8% 52647 Â 8% sched_debug.cpu.nr_switches.min
>> 6662 Â 6% +61.9% 10789 Â 24% sched_debug.cpu.nr_switches.stddev
>> 80.45 Â 18% -19.1% 65.05 Â 6% sched_debug.cpu.nr_uninterruptible.stddev
>> 76819 -19.3% 62008 Â 8% sched_debug.cpu.sched_count.avg
>> 70616 -23.5% 53996 Â 8% sched_debug.cpu.sched_count.min
>> 5494 Â 9% +85.3% 10179 Â 26% sched_debug.cpu.sched_count.stddev
>> 16936 -52.9% 7975 Â 9% sched_debug.cpu.sched_goidle.avg
>> 19281 -49.9% 9666 Â 7% sched_debug.cpu.sched_goidle.max
>> 15417 -54.8% 6962 Â 10% sched_debug.cpu.sched_goidle.min
>> 875.00 Â 6% -35.0% 569.09 Â 13% sched_debug.cpu.sched_goidle.stddev
>> 40332 -23.5% 30851 Â 7% sched_debug.cpu.ttwu_count.avg
>> 35074 -26.3% 25833 Â 6% sched_debug.cpu.ttwu_count.min
>> 3239 Â 8% +67.4% 5422 Â 28% sched_debug.cpu.ttwu_count.stddev
>> 5232 +27.4% 6665 Â 13% sched_debug.cpu.ttwu_local.avg
>> 15877 Â 12% +77.5% 28184 Â 27% sched_debug.cpu.ttwu_local.max
>> 2530 Â 10% +95.9% 4956 Â 27% sched_debug.cpu.ttwu_local.stddev
>> 2.52 Â 7% -0.6 1.95 Â 3% perf-profile.calltrace.cycles-pp.btrfs_dirty_pages.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write.vfs_write
>> 1.48 Â 12% -0.5 1.01 Â 4% perf-profile.calltrace.cycles-pp.btrfs_get_extent.btrfs_dirty_pages.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write
>> 1.18 Â 16% -0.4 0.76 Â 7% perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.btrfs_dirty_pages.__btrfs_buffered_write
>> 1.18 Â 16% -0.4 0.76 Â 7% perf-profile.calltrace.cycles-pp.btrfs_lookup_file_extent.btrfs_get_extent.btrfs_dirty_pages.__btrfs_buffered_write.btrfs_file_write_iter
>> 0.90 Â 17% -0.3 0.56 Â 4% perf-profile.calltrace.cycles-pp.__dentry_kill.dentry_kill.dput.__fput.task_work_run
>> 0.90 Â 17% -0.3 0.56 Â 4% perf-profile.calltrace.cycles-pp.evict.__dentry_kill.dentry_kill.dput.__fput
>> 0.90 Â 17% -0.3 0.56 Â 4% perf-profile.calltrace.cycles-pp.dentry_kill.dput.__fput.task_work_run.exit_to_usermode_loop
>> 0.90 Â 18% -0.3 0.56 Â 4% perf-profile.calltrace.cycles-pp.btrfs_evict_inode.evict.__dentry_kill.dentry_kill.dput
>> 0.90 Â 17% -0.3 0.57 Â 5% perf-profile.calltrace.cycles-pp.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
>> 0.90 Â 17% -0.3 0.57 Â 5% perf-profile.calltrace.cycles-pp.task_work_run.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
>> 0.90 Â 17% -0.3 0.57 Â 5% perf-profile.calltrace.cycles-pp.__fput.task_work_run.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
>> 0.90 Â 17% -0.3 0.57 Â 5% perf-profile.calltrace.cycles-pp.dput.__fput.task_work_run.exit_to_usermode_loop.do_syscall_64
>> 1.69 -0.1 1.54 Â 2% perf-profile.calltrace.cycles-pp.lock_and_cleanup_extent_if_need.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write.vfs_write
>> 0.87 Â 4% -0.1 0.76 Â 2% perf-profile.calltrace.cycles-pp.__clear_extent_bit.clear_extent_bit.lock_and_cleanup_extent_if_need.__btrfs_buffered_write.btrfs_file_write_iter
>> 0.87 Â 4% -0.1 0.76 Â 2% perf-profile.calltrace.cycles-pp.clear_extent_bit.lock_and_cleanup_extent_if_need.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write
>> 0.71 Â 6% -0.1 0.61 Â 2% perf-profile.calltrace.cycles-pp.clear_state_bit.__clear_extent_bit.clear_extent_bit.lock_and_cleanup_extent_if_need.__btrfs_buffered_write
>> 0.69 Â 6% -0.1 0.60 Â 2% perf-profile.calltrace.cycles-pp.btrfs_clear_bit_hook.clear_state_bit.__clear_extent_bit.clear_extent_bit.lock_and_cleanup_extent_if_need
>> 96.77 +0.6 97.33 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe
>> 0.00 +0.6 0.56 Â 3% perf-profile.calltrace.cycles-pp.can_overcommit.reserve_metadata_bytes.btrfs_delalloc_reserve_metadata.__btrfs_buffered_write.btrfs_file_write_iter
>> 96.72 +0.6 97.29 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe
>> 43.13 +0.8 43.91 perf-profile.calltrace.cycles-pp.btrfs_inode_rsv_release.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write.vfs_write
>> 42.37 +0.8 43.16 perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.block_rsv_release_bytes.btrfs_inode_rsv_release.__btrfs_buffered_write
>> 43.11 +0.8 43.89 perf-profile.calltrace.cycles-pp.block_rsv_release_bytes.btrfs_inode_rsv_release.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write
>> 42.96 +0.8 43.77 perf-profile.calltrace.cycles-pp._raw_spin_lock.block_rsv_release_bytes.btrfs_inode_rsv_release.__btrfs_buffered_write.btrfs_file_write_iter
>> 95.28 +0.9 96.23 perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
>> 95.22 +1.0 96.18 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
>> 94.88 +1.0 95.85 perf-profile.calltrace.cycles-pp.__vfs_write.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
>> 94.83 +1.0 95.80 perf-profile.calltrace.cycles-pp.btrfs_file_write_iter.__vfs_write.vfs_write.ksys_write.do_syscall_64
>> 94.51 +1.0 95.50 perf-profile.calltrace.cycles-pp.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write.vfs_write.ksys_write
>> 42.44 +1.1 43.52 perf-profile.calltrace.cycles-pp._raw_spin_lock.reserve_metadata_bytes.btrfs_delalloc_reserve_metadata.__btrfs_buffered_write.btrfs_file_write_iter
>> 42.09 +1.1 43.18 perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.reserve_metadata_bytes.btrfs_delalloc_reserve_metadata.__btrfs_buffered_write
>> 44.07 +1.2 45.29 perf-profile.calltrace.cycles-pp.btrfs_delalloc_reserve_metadata.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write.vfs_write
>> 43.42 +1.3 44.69 perf-profile.calltrace.cycles-pp.reserve_metadata_bytes.btrfs_delalloc_reserve_metadata.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write
>> 2.06 Â 18% -0.9 1.21 Â 6% perf-profile.children.cycles-pp.btrfs_search_slot
>> 2.54 Â 7% -0.6 1.96 Â 3% perf-profile.children.cycles-pp.btrfs_dirty_pages
>> 1.05 Â 24% -0.5 0.52 Â 9% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
>> 1.50 Â 12% -0.5 1.03 Â 4% perf-profile.children.cycles-pp.btrfs_get_extent
>> 1.22 Â 15% -0.4 0.79 Â 8% perf-profile.children.cycles-pp.btrfs_lookup_file_extent
>> 0.81 Â 5% -0.4 0.41 Â 6% perf-profile.children.cycles-pp.btrfs_calc_reclaim_metadata_size
>> 0.74 Â 24% -0.4 0.35 Â 9% perf-profile.children.cycles-pp.btrfs_lock_root_node
>> 0.74 Â 24% -0.4 0.35 Â 9% perf-profile.children.cycles-pp.btrfs_tree_lock
>> 0.90 Â 17% -0.3 0.56 Â 4% perf-profile.children.cycles-pp.__dentry_kill
>> 0.90 Â 17% -0.3 0.56 Â 4% perf-profile.children.cycles-pp.evict
>> 0.90 Â 17% -0.3 0.56 Â 4% perf-profile.children.cycles-pp.dentry_kill
>> 0.90 Â 18% -0.3 0.56 Â 4% perf-profile.children.cycles-pp.btrfs_evict_inode
>> 0.91 Â 18% -0.3 0.57 Â 4% perf-profile.children.cycles-pp.exit_to_usermode_loop
>> 0.52 Â 20% -0.3 0.18 Â 14% perf-profile.children.cycles-pp.do_idle
>> 0.90 Â 17% -0.3 0.57 Â 5% perf-profile.children.cycles-pp.task_work_run
>> 0.90 Â 17% -0.3 0.57 Â 5% perf-profile.children.cycles-pp.__fput
>> 0.90 Â 18% -0.3 0.57 Â 4% perf-profile.children.cycles-pp.dput
>> 0.51 Â 20% -0.3 0.18 Â 14% perf-profile.children.cycles-pp.secondary_startup_64
>> 0.51 Â 20% -0.3 0.18 Â 14% perf-profile.children.cycles-pp.cpu_startup_entry
>> 0.50 Â 21% -0.3 0.17 Â 16% perf-profile.children.cycles-pp.start_secondary
>> 0.47 Â 20% -0.3 0.16 Â 13% perf-profile.children.cycles-pp.cpuidle_enter_state
>> 0.47 Â 19% -0.3 0.16 Â 13% perf-profile.children.cycles-pp.intel_idle
>> 0.61 Â 20% -0.3 0.36 Â 11% perf-profile.children.cycles-pp.btrfs_tree_read_lock
>> 0.47 Â 26% -0.3 0.21 Â 10% perf-profile.children.cycles-pp.prepare_to_wait_event
>> 0.64 Â 18% -0.2 0.39 Â 9% perf-profile.children.cycles-pp.btrfs_read_lock_root_node
>> 0.40 Â 22% -0.2 0.21 Â 5% perf-profile.children.cycles-pp.btrfs_clear_path_blocking
>> 0.38 Â 23% -0.2 0.19 Â 13% perf-profile.children.cycles-pp.finish_wait
>> 1.51 Â 3% -0.2 1.35 Â 2% perf-profile.children.cycles-pp.__clear_extent_bit
>> 1.71 -0.1 1.56 Â 2% perf-profile.children.cycles-pp.lock_and_cleanup_extent_if_need
>> 0.29 Â 25% -0.1 0.15 Â 10% perf-profile.children.cycles-pp.btrfs_orphan_del
>> 0.27 Â 27% -0.1 0.12 Â 8% perf-profile.children.cycles-pp.btrfs_del_orphan_item
>> 0.33 Â 18% -0.1 0.19 Â 9% perf-profile.children.cycles-pp.queued_read_lock_slowpath
>> 0.33 Â 19% -0.1 0.20 Â 4% perf-profile.children.cycles-pp.__wake_up_common_lock
>> 0.45 Â 15% -0.1 0.34 Â 2% perf-profile.children.cycles-pp.btrfs_alloc_data_chunk_ondemand
>> 0.47 Â 16% -0.1 0.36 Â 4% perf-profile.children.cycles-pp.btrfs_check_data_free_space
>> 0.91 Â 4% -0.1 0.81 Â 3% perf-profile.children.cycles-pp.clear_extent_bit
>> 1.07 Â 5% -0.1 0.97 perf-profile.children.cycles-pp.__set_extent_bit
>> 0.77 Â 6% -0.1 0.69 Â 3% perf-profile.children.cycles-pp.btrfs_clear_bit_hook
>> 0.17 Â 20% -0.1 0.08 Â 10% perf-profile.children.cycles-pp.queued_write_lock_slowpath
>> 0.16 Â 22% -0.1 0.08 Â 24% perf-profile.children.cycles-pp.btrfs_lookup_inode
>> 0.21 Â 17% -0.1 0.14 Â 19% perf-profile.children.cycles-pp.__btrfs_update_delayed_inode
>> 0.26 Â 12% -0.1 0.18 Â 13% perf-profile.children.cycles-pp.btrfs_async_run_delayed_root
>> 0.52 Â 5% -0.1 0.45 perf-profile.children.cycles-pp.set_extent_bit
>> 0.45 Â 5% -0.1 0.40 Â 3% perf-profile.children.cycles-pp.alloc_extent_state
>> 0.11 Â 17% -0.1 0.06 Â 11% perf-profile.children.cycles-pp.btrfs_clear_lock_blocking_rw
>> 0.28 Â 9% -0.0 0.23 Â 3% perf-profile.children.cycles-pp.btrfs_drop_pages
>> 0.07 -0.0 0.03 Â100% perf-profile.children.cycles-pp.btrfs_set_lock_blocking_rw
>> 0.39 Â 3% -0.0 0.34 Â 3% perf-profile.children.cycles-pp.get_alloc_profile
>> 0.33 Â 7% -0.0 0.29 perf-profile.children.cycles-pp.btrfs_set_extent_delalloc
>> 0.38 Â 2% -0.0 0.35 Â 4% perf-profile.children.cycles-pp.__set_page_dirty_nobuffers
>> 0.49 Â 3% -0.0 0.46 Â 3% perf-profile.children.cycles-pp.pagecache_get_page
>> 0.18 Â 4% -0.0 0.15 Â 2% perf-profile.children.cycles-pp.truncate_inode_pages_range
>> 0.08 Â 5% -0.0 0.05 Â 9% perf-profile.children.cycles-pp.btrfs_set_path_blocking
>> 0.08 Â 6% -0.0 0.06 Â 6% perf-profile.children.cycles-pp.truncate_cleanup_page
>> 0.80 Â 4% +0.2 0.95 Â 2% perf-profile.children.cycles-pp.can_overcommit
>> 96.84 +0.5 97.37 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
>> 96.80 +0.5 97.35 perf-profile.children.cycles-pp.do_syscall_64
>> 43.34 +0.8 44.17 perf-profile.children.cycles-pp.btrfs_inode_rsv_release
>> 43.49 +0.8 44.32 perf-profile.children.cycles-pp.block_rsv_release_bytes
>> 95.32 +0.9 96.26 perf-profile.children.cycles-pp.ksys_write
>> 95.26 +0.9 96.20 perf-profile.children.cycles-pp.vfs_write
>> 94.91 +1.0 95.88 perf-profile.children.cycles-pp.__vfs_write
>> 94.84 +1.0 95.81 perf-profile.children.cycles-pp.btrfs_file_write_iter
>> 94.55 +1.0 95.55 perf-profile.children.cycles-pp.__btrfs_buffered_write
>> 86.68 +1.0 87.70 perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
>> 44.08 +1.2 45.31 perf-profile.children.cycles-pp.btrfs_delalloc_reserve_metadata
>> 43.49 +1.3 44.77 perf-profile.children.cycles-pp.reserve_metadata_bytes
>> 87.59 +1.8 89.38 perf-profile.children.cycles-pp._raw_spin_lock
>> 0.47 Â 19% -0.3 0.16 Â 13% perf-profile.self.cycles-pp.intel_idle
>> 0.33 Â 6% -0.1 0.18 Â 6% perf-profile.self.cycles-pp.get_alloc_profile
>> 0.27 Â 8% -0.0 0.22 Â 4% perf-profile.self.cycles-pp.btrfs_drop_pages
>> 0.07 -0.0 0.03 Â100% perf-profile.self.cycles-pp.btrfs_set_lock_blocking_rw
>> 0.14 Â 5% -0.0 0.12 Â 6% perf-profile.self.cycles-pp.clear_page_dirty_for_io
>> 0.09 Â 5% -0.0 0.07 Â 10% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
>> 0.17 Â 4% +0.1 0.23 Â 3% perf-profile.self.cycles-pp.reserve_metadata_bytes
>> 0.31 Â 7% +0.1 0.45 Â 2% perf-profile.self.cycles-pp.can_overcommit
>> 86.35 +1.0 87.39 perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
>>
>>
>>
>> aim7.jobs-per-min
>>
>> 29000 +-+-----------------------------------------------------------------+
>> 28500 +-+ +.. + +..+.. +.. |
>> |..+ +.+..+.. : .. + .+.+..+..+.+.. .+..+.. + + + |
>> 28000 +-+ + .. : + +. + + + |
>> 27500 +-+ + + |
>> | |
>> 27000 +-+ |
>> 26500 +-+ |
>> 26000 +-+ |
>> | |
>> 25500 +-+ O O O O O |
>> 25000 +-+ O O O O O O O O O
>> | O O O O O O O O |
>> 24500 O-+O O O O |
>> 24000 +-+-----------------------------------------------------------------+
>>
>>
>> [*] 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,
>> Xiaolong
>>
>>
>>
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>>