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Message-ID: <53166948-c4db-635d-3098-5e88ce8fa9c0@kernel.dk>
Date: Tue, 18 Dec 2018 11:57:00 -0700
From: Jens Axboe <axboe@...nel.dk>
To: kemi <kemi.wang@...el.com>,
kernel test robot <xiaolong.ye@...el.com>,
SeongJae Park <sj38.park@...il.com>
Cc: Jens Axboe <axboe@...com>, lkp@...org,
LKML <linux-kernel@...r.kernel.org>, Chris Mason <clm@...com>,
Omar Sandoval <osandov@...ndov.com>
Subject: Re: [LKP] [lkp-robot] [brd] 316ba5736c: aim7.jobs-per-min -11.2%
regression
On 12/18/18 2:11 AM, kemi wrote:
> 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.
I really suspect that this is a btrfs issue, as this is just flagging
what is pretty obvious, that a ramdisk is NOT a rotational drive.
So whatever btrfs is doing with that information is causing it to
run slower - this really doesn't make any sense, but there we are.
CC'ing Chris, leaving the report below.
> On 2018/7/10 下午1:27, kemi wrote:
>> Hi, SeongJae
>> Do you have any input for this regression? thanks
>>
>> On 2018年06月04日 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 ± 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
>>>
>>>
>>>
>>> _______________________________________________
>>> LKP mailing list
>>> LKP@...ts.01.org
>>> https://lists.01.org/mailman/listinfo/lkp
>>>
--
Jens Axboe
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