Re: [lkp-robot] [brd] 316ba5736c: aim7.jobs-per-min -11.2% regression
From: Jens Axboe
Date: Mon Jun 04 2018 - 11:50:39 EST
On 6/3/18 11:52 PM, 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
Does this also happen on eg ext4 or xfs? If not, it might point to something in
btrfs that ends up being worse for a device that isn't rotational.
CC'ing the btrfs guys, and leaving the rest of the email below.
> 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://urldefense.proofpoint.com/v2/url?u=https-3A__sourceforge.net_projects_aimbench_files_aim-2Dsuite7_&d=DwIDAw&c=5VD0RTtNlTh3ycd41b3MUw&r=cK1a7KivzZRh1fKQMjSm2A&m=IKNYvfXb5tRluNV45DgoqZaSiffR8xKQObhRn_lf1zo&s=12WA2xKDvsfwuUtTCsanhmFyD3le2LUKfG5u-O5sChk&e=
>
>
>
> 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 ± 2% +14.6% 1646849 ± 2% aim7.time.involuntary_context_switches
> 11986 +14.2% 13691 aim7.time.system_time
> 73.06 ± 2% -3.6% 70.43 aim7.time.user_time
> 2449470 ± 2% -25.0% 1837521 ± 4% aim7.time.voluntary_context_switches
> 20.25 ± 58% +1681.5% 360.75 ±109% numa-meminfo.node1.Mlocked
> 456062 -16.3% 381859 softirqs.SCHED
> 9015 ± 7% -21.3% 7098 ± 22% meminfo.CmaFree
> 47.50 ± 58% +1355.8% 691.50 ± 92% meminfo.Mlocked
> 5.24 ± 3% -1.2 3.99 ± 2% mpstat.cpu.idle%
> 0.61 ± 2% -0.1 0.52 ± 2% mpstat.cpu.usr%
> 16627 +12.8% 18762 ± 4% slabinfo.Acpi-State.active_objs
> 16627 +12.9% 18775 ± 4% slabinfo.Acpi-State.num_objs
> 57.00 ± 2% +17.5% 67.00 vmstat.procs.r
> 20936 -24.8% 15752 ± 2% vmstat.system.cs
> 45474 -1.7% 44681 vmstat.system.in
> 6.50 ± 59% +1157.7% 81.75 ± 75% numa-vmstat.node0.nr_mlock
> 242870 ± 3% +13.2% 274913 ± 7% numa-vmstat.node0.nr_written
> 2278 ± 7% -22.6% 1763 ± 21% numa-vmstat.node1.nr_free_cma
> 4.75 ± 58% +1789.5% 89.75 ±109% numa-vmstat.node1.nr_mlock
> 88018135 ± 3% -48.9% 44980457 ± 7% cpuidle.C1.time
> 1398288 ± 3% -51.1% 683493 ± 9% cpuidle.C1.usage
> 3499814 ± 2% -38.5% 2153158 ± 5% cpuidle.C1E.time
> 52722 ± 4% -45.6% 28692 ± 6% cpuidle.C1E.usage
> 9865857 ± 3% -40.1% 5905155 ± 5% cpuidle.C3.time
> 69656 ± 2% -42.6% 39990 ± 5% cpuidle.C3.usage
> 590856 ± 2% -12.3% 517910 cpuidle.C6.usage
> 46160 ± 7% -53.7% 21372 ± 11% cpuidle.POLL.time
> 1716 ± 7% -46.6% 916.25 ± 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 ± 8% -24.4% 1725 ± 22% proc-vmstat.nr_free_cma
> 357.50 +10.6% 395.25 ± 2% proc-vmstat.nr_inactive_file
> 11.50 ± 58% +1397.8% 172.25 ± 93% proc-vmstat.nr_mlock
> 970355 ± 4% +14.6% 1111549 ± 8% proc-vmstat.nr_written
> 197984 +4.1% 206034 proc-vmstat.nr_zone_active_file
> 357.50 +10.6% 395.25 ± 2% proc-vmstat.nr_zone_inactive_file
> 192282 +4.1% 200126 proc-vmstat.nr_zone_write_pending
> 7901465 ± 3% -14.0% 6795016 ± 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 ± 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 ± 2% perf-stat.cache-references
> 6712739 ± 2% -15.4% 5678643 ± 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 ± 2% perf-stat.cpu-migrations
> 2.476e+12 +13.4% 2.809e+12 perf-stat.dTLB-loads
> 0.18 ± 2% -0.0 0.16 ± 9% perf-stat.dTLB-store-miss-rate%
> 1.079e+09 ± 2% -9.6% 9.755e+08 ± 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 ± 11% +19.8% 13477 ± 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 ± 3% +9.8% 3.186e+09 ± 3% perf-stat.node-load-misses
> 3.682e+09 ± 3% +11.0% 4.088e+09 ± 3% perf-stat.node-loads
> 3.778e+09 +4.8% 3.959e+09 ± 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 ± 5% -12.5% 45.30 ± 10% sched_debug.cfs_rq:/.load_avg.avg
> 316.35 ± 3% +17.2% 370.81 ± 8% sched_debug.cfs_rq:/.util_est_enqueued.stddev
> 15294 ± 30% +234.9% 51219 ± 76% sched_debug.cpu.avg_idle.min
> 299443 ± 3% -7.3% 277566 ± 5% sched_debug.cpu.avg_idle.stddev
> 1182 ± 19% -26.3% 872.02 ± 13% sched_debug.cpu.nr_load_updates.stddev
> 1.22 ± 8% +21.7% 1.48 ± 6% sched_debug.cpu.nr_running.avg
> 2.75 ± 10% +26.2% 3.47 ± 6% sched_debug.cpu.nr_running.max
> 0.58 ± 7% +24.2% 0.73 ± 6% sched_debug.cpu.nr_running.stddev
> 77148 -20.0% 61702 ± 7% sched_debug.cpu.nr_switches.avg
> 70024 -24.8% 52647 ± 8% sched_debug.cpu.nr_switches.min
> 6662 ± 6% +61.9% 10789 ± 24% sched_debug.cpu.nr_switches.stddev
> 80.45 ± 18% -19.1% 65.05 ± 6% sched_debug.cpu.nr_uninterruptible.stddev
> 76819 -19.3% 62008 ± 8% sched_debug.cpu.sched_count.avg
> 70616 -23.5% 53996 ± 8% sched_debug.cpu.sched_count.min
> 5494 ± 9% +85.3% 10179 ± 26% sched_debug.cpu.sched_count.stddev
> 16936 -52.9% 7975 ± 9% sched_debug.cpu.sched_goidle.avg
> 19281 -49.9% 9666 ± 7% sched_debug.cpu.sched_goidle.max
> 15417 -54.8% 6962 ± 10% sched_debug.cpu.sched_goidle.min
> 875.00 ± 6% -35.0% 569.09 ± 13% sched_debug.cpu.sched_goidle.stddev
> 40332 -23.5% 30851 ± 7% sched_debug.cpu.ttwu_count.avg
> 35074 -26.3% 25833 ± 6% sched_debug.cpu.ttwu_count.min
> 3239 ± 8% +67.4% 5422 ± 28% sched_debug.cpu.ttwu_count.stddev
> 5232 +27.4% 6665 ± 13% sched_debug.cpu.ttwu_local.avg
> 15877 ± 12% +77.5% 28184 ± 27% sched_debug.cpu.ttwu_local.max
> 2530 ± 10% +95.9% 4956 ± 27% sched_debug.cpu.ttwu_local.stddev
> 2.52 ± 7% -0.6 1.95 ± 3% perf-profile.calltrace.cycles-pp.btrfs_dirty_pages.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write.vfs_write
> 1.48 ± 12% -0.5 1.01 ± 4% perf-profile.calltrace.cycles-pp.btrfs_get_extent.btrfs_dirty_pages.__btrfs_buffered_write.btrfs_file_write_iter.__vfs_write
> 1.18 ± 16% -0.4 0.76 ± 7% perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.btrfs_dirty_pages.__btrfs_buffered_write
> 1.18 ± 16% -0.4 0.76 ± 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 ± 17% -0.3 0.56 ± 4% perf-profile.calltrace.cycles-pp.__dentry_kill.dentry_kill.dput.__fput.task_work_run
> 0.90 ± 17% -0.3 0.56 ± 4% perf-profile.calltrace.cycles-pp.evict.__dentry_kill.dentry_kill.dput.__fput
> 0.90 ± 17% -0.3 0.56 ± 4% perf-profile.calltrace.cycles-pp.dentry_kill.dput.__fput.task_work_run.exit_to_usermode_loop
> 0.90 ± 18% -0.3 0.56 ± 4% perf-profile.calltrace.cycles-pp.btrfs_evict_inode.evict.__dentry_kill.dentry_kill.dput
> 0.90 ± 17% -0.3 0.57 ± 5% perf-profile.calltrace.cycles-pp.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.90 ± 17% -0.3 0.57 ± 5% perf-profile.calltrace.cycles-pp.task_work_run.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.90 ± 17% -0.3 0.57 ± 5% perf-profile.calltrace.cycles-pp.__fput.task_work_run.exit_to_usermode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.90 ± 17% -0.3 0.57 ± 5% perf-profile.calltrace.cycles-pp.dput.__fput.task_work_run.exit_to_usermode_loop.do_syscall_64
> 1.69 -0.1 1.54 ± 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 ± 4% -0.1 0.76 ± 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 ± 4% -0.1 0.76 ± 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 ± 6% -0.1 0.61 ± 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 ± 6% -0.1 0.60 ± 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 ± 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 ± 18% -0.9 1.21 ± 6% perf-profile.children.cycles-pp.btrfs_search_slot
> 2.54 ± 7% -0.6 1.96 ± 3% perf-profile.children.cycles-pp.btrfs_dirty_pages
> 1.05 ± 24% -0.5 0.52 ± 9% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
> 1.50 ± 12% -0.5 1.03 ± 4% perf-profile.children.cycles-pp.btrfs_get_extent
> 1.22 ± 15% -0.4 0.79 ± 8% perf-profile.children.cycles-pp.btrfs_lookup_file_extent
> 0.81 ± 5% -0.4 0.41 ± 6% perf-profile.children.cycles-pp.btrfs_calc_reclaim_metadata_size
> 0.74 ± 24% -0.4 0.35 ± 9% perf-profile.children.cycles-pp.btrfs_lock_root_node
> 0.74 ± 24% -0.4 0.35 ± 9% perf-profile.children.cycles-pp.btrfs_tree_lock
> 0.90 ± 17% -0.3 0.56 ± 4% perf-profile.children.cycles-pp.__dentry_kill
> 0.90 ± 17% -0.3 0.56 ± 4% perf-profile.children.cycles-pp.evict
> 0.90 ± 17% -0.3 0.56 ± 4% perf-profile.children.cycles-pp.dentry_kill
> 0.90 ± 18% -0.3 0.56 ± 4% perf-profile.children.cycles-pp.btrfs_evict_inode
> 0.91 ± 18% -0.3 0.57 ± 4% perf-profile.children.cycles-pp.exit_to_usermode_loop
> 0.52 ± 20% -0.3 0.18 ± 14% perf-profile.children.cycles-pp.do_idle
> 0.90 ± 17% -0.3 0.57 ± 5% perf-profile.children.cycles-pp.task_work_run
> 0.90 ± 17% -0.3 0.57 ± 5% perf-profile.children.cycles-pp.__fput
> 0.90 ± 18% -0.3 0.57 ± 4% perf-profile.children.cycles-pp.dput
> 0.51 ± 20% -0.3 0.18 ± 14% perf-profile.children.cycles-pp.secondary_startup_64
> 0.51 ± 20% -0.3 0.18 ± 14% perf-profile.children.cycles-pp.cpu_startup_entry
> 0.50 ± 21% -0.3 0.17 ± 16% perf-profile.children.cycles-pp.start_secondary
> 0.47 ± 20% -0.3 0.16 ± 13% perf-profile.children.cycles-pp.cpuidle_enter_state
> 0.47 ± 19% -0.3 0.16 ± 13% perf-profile.children.cycles-pp.intel_idle
> 0.61 ± 20% -0.3 0.36 ± 11% perf-profile.children.cycles-pp.btrfs_tree_read_lock
> 0.47 ± 26% -0.3 0.21 ± 10% perf-profile.children.cycles-pp.prepare_to_wait_event
> 0.64 ± 18% -0.2 0.39 ± 9% perf-profile.children.cycles-pp.btrfs_read_lock_root_node
> 0.40 ± 22% -0.2 0.21 ± 5% perf-profile.children.cycles-pp.btrfs_clear_path_blocking
> 0.38 ± 23% -0.2 0.19 ± 13% perf-profile.children.cycles-pp.finish_wait
> 1.51 ± 3% -0.2 1.35 ± 2% perf-profile.children.cycles-pp.__clear_extent_bit
> 1.71 -0.1 1.56 ± 2% perf-profile.children.cycles-pp.lock_and_cleanup_extent_if_need
> 0.29 ± 25% -0.1 0.15 ± 10% perf-profile.children.cycles-pp.btrfs_orphan_del
> 0.27 ± 27% -0.1 0.12 ± 8% perf-profile.children.cycles-pp.btrfs_del_orphan_item
> 0.33 ± 18% -0.1 0.19 ± 9% perf-profile.children.cycles-pp.queued_read_lock_slowpath
> 0.33 ± 19% -0.1 0.20 ± 4% perf-profile.children.cycles-pp.__wake_up_common_lock
> 0.45 ± 15% -0.1 0.34 ± 2% perf-profile.children.cycles-pp.btrfs_alloc_data_chunk_ondemand
> 0.47 ± 16% -0.1 0.36 ± 4% perf-profile.children.cycles-pp.btrfs_check_data_free_space
> 0.91 ± 4% -0.1 0.81 ± 3% perf-profile.children.cycles-pp.clear_extent_bit
> 1.07 ± 5% -0.1 0.97 perf-profile.children.cycles-pp.__set_extent_bit
> 0.77 ± 6% -0.1 0.69 ± 3% perf-profile.children.cycles-pp.btrfs_clear_bit_hook
> 0.17 ± 20% -0.1 0.08 ± 10% perf-profile.children.cycles-pp.queued_write_lock_slowpath
> 0.16 ± 22% -0.1 0.08 ± 24% perf-profile.children.cycles-pp.btrfs_lookup_inode
> 0.21 ± 17% -0.1 0.14 ± 19% perf-profile.children.cycles-pp.__btrfs_update_delayed_inode
> 0.26 ± 12% -0.1 0.18 ± 13% perf-profile.children.cycles-pp.btrfs_async_run_delayed_root
> 0.52 ± 5% -0.1 0.45 perf-profile.children.cycles-pp.set_extent_bit
> 0.45 ± 5% -0.1 0.40 ± 3% perf-profile.children.cycles-pp.alloc_extent_state
> 0.11 ± 17% -0.1 0.06 ± 11% perf-profile.children.cycles-pp.btrfs_clear_lock_blocking_rw
> 0.28 ± 9% -0.0 0.23 ± 3% perf-profile.children.cycles-pp.btrfs_drop_pages
> 0.07 -0.0 0.03 ±100% perf-profile.children.cycles-pp.btrfs_set_lock_blocking_rw
> 0.39 ± 3% -0.0 0.34 ± 3% perf-profile.children.cycles-pp.get_alloc_profile
> 0.33 ± 7% -0.0 0.29 perf-profile.children.cycles-pp.btrfs_set_extent_delalloc
> 0.38 ± 2% -0.0 0.35 ± 4% perf-profile.children.cycles-pp.__set_page_dirty_nobuffers
> 0.49 ± 3% -0.0 0.46 ± 3% perf-profile.children.cycles-pp.pagecache_get_page
> 0.18 ± 4% -0.0 0.15 ± 2% perf-profile.children.cycles-pp.truncate_inode_pages_range
> 0.08 ± 5% -0.0 0.05 ± 9% perf-profile.children.cycles-pp.btrfs_set_path_blocking
> 0.08 ± 6% -0.0 0.06 ± 6% perf-profile.children.cycles-pp.truncate_cleanup_page
> 0.80 ± 4% +0.2 0.95 ± 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 ± 19% -0.3 0.16 ± 13% perf-profile.self.cycles-pp.intel_idle
> 0.33 ± 6% -0.1 0.18 ± 6% perf-profile.self.cycles-pp.get_alloc_profile
> 0.27 ± 8% -0.0 0.22 ± 4% perf-profile.self.cycles-pp.btrfs_drop_pages
> 0.07 -0.0 0.03 ±100% perf-profile.self.cycles-pp.btrfs_set_lock_blocking_rw
> 0.14 ± 5% -0.0 0.12 ± 6% perf-profile.self.cycles-pp.clear_page_dirty_for_io
> 0.09 ± 5% -0.0 0.07 ± 10% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
> 0.17 ± 4% +0.1 0.23 ± 3% perf-profile.self.cycles-pp.reserve_metadata_bytes
> 0.31 ± 7% +0.1 0.45 ± 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
>
--
Jens Axboe