Greeting,
FYI, we noticed a 2.3% improvement of fsmark.files_per_sec due to commit:
commit: 59c7b566a3b653fe7865cef007c053fd88de8317 ("btrfs: index free space entries on size")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: fsmark
on test machine: 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz with 128G memory
with following parameters:
iterations: 1x
nr_threads: 1t
disk: 1HDD
fs: btrfs
filesize: 4K
test_size: 80M
sync_method: fsyncBeforeClose
nr_files_per_directory: 1fpd
cpufreq_governor: performance
ucode: 0xd000280
test-description: The fsmark is a file system benchmark to test synchronous write workloads, for example, mail servers workload.
test-url: https://sourceforge.net/projects/fsmark/
In addition to that, the commit also has significant impact on the following tests:
+------------------+-------------------------------------------------------------------------------------+
| testcase: change | fsmark: fsmark.files_per_sec 1.7% improvement |
| test machine | 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz with 128G memory |
| test parameters | cpufreq_governor=performance |
| | disk=1HDD |
| | filesize=4K |
| | fs2=nfsv4 |
| | fs=btrfs |
| | iterations=1x |
| | nr_files_per_directory=1fpd |
| | nr_threads=1t |
| | sync_method=fsyncBeforeClose |
| | test_size=80M |
| | ucode=0xd000280 |
+------------------+-------------------------------------------------------------------------------------+
| testcase: change | fxmark: fxmark.ssd_btrfs_DWSL_1_directio.works/sec 13.5% improvement |
| test machine | 24 threads 1 sockets Intel Atom(R) P5362 processor with 64G memory |
| test parameters | cpufreq_governor=performance |
| | directio=directio |
| | disk=1SSD |
| | fstype=btrfs |
| | media=ssd |
| | test=DWSL |
| | ucode=0x9c02000e |
+------------------+-------------------------------------------------------------------------------------+
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
sudo bin/lkp install job.yaml # job file is attached in this email
bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
sudo bin/lkp run generated-yaml-file
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
=========================================================================================
compiler/cpufreq_governor/disk/filesize/fs/iterations/kconfig/nr_files_per_directory/nr_threads/rootfs/sync_method/tbox_group/test_size/testcase/ucode:
gcc-9/performance/1HDD/4K/btrfs/1x/x86_64-rhel-8.3/1fpd/1t/debian-10.4-x86_64-20200603.cgz/fsyncBeforeClose/lkp-icl-2sp6/80M/fsmark/0xd000280
commit:
950575c023 ("btrfs: only use ->max_extent_size if it is set in the bitmap")
59c7b566a3 ("btrfs: index free space entries on size")
950575c023aabfea 59c7b566a3b653fe7865cef007c
---------------- ---------------------------
%stddev %change %stddev
\ | \
18.52 +2.3% 18.95 fsmark.files_per_sec
1105 -2.1% 1082 fsmark.time.elapsed_time
1105 -2.1% 1082 fsmark.time.elapsed_time.max
2386202 +4.8% 2500997 fsmark.time.file_system_outputs
104263 +3.8% 108264 ? 2% fsmark.time.voluntary_context_switches
64753 ? 64% -78.7% 13805 ?140% numa-numastat.node0.other_node
2204 +6.7% 2352 vmstat.io.bo
244374 +10.1% 269059 meminfo.Active
227607 +11.1% 252960 meminfo.Active(file)
121086 ? 94% +113.5% 258561 numa-meminfo.node0.Active
114024 ? 97% +120.6% 251529 numa-meminfo.node0.Active(file)
28484 ? 97% +120.8% 62902 numa-vmstat.node0.nr_active_file
28484 ? 97% +120.8% 62902 numa-vmstat.node0.nr_zone_active_file
2497 ?181% -99.4% 14.33 ? 77% softirqs.CPU114.TIMER
5.33 ?223% +3e+05% 16196 ?218% softirqs.CPU19.NET_RX
0.07 ? 12% +0.0 0.10 ? 14% perf-profile.children.cycles-pp.perf_trace_sched_wakeup_template
0.05 ? 48% +0.0 0.08 ? 20% perf-profile.children.cycles-pp.__note_gp_changes
0.06 ? 26% +0.1 0.12 ? 51% perf-profile.children.cycles-pp.pm_qos_read_value
0.07 ? 54% +0.1 0.16 ? 70% perf-profile.children.cycles-pp.irqtime_account_process_tick
0.12 ? 18% +0.1 0.25 ? 55% perf-profile.children.cycles-pp.rb_insert_color
0.23 ? 11% +0.1 0.38 ? 42% perf-profile.children.cycles-pp.cpuidle_governor_latency_req
0.22 ? 9% +0.2 0.43 ? 61% perf-profile.children.cycles-pp.timerqueue_add
0.29 ? 14% +0.2 0.51 ? 49% perf-profile.children.cycles-pp.enqueue_hrtimer
0.01 ?223% +0.1 0.10 ? 68% perf-profile.self.cycles-pp.pm_qos_read_value
0.12 ? 21% +0.1 0.24 ? 56% perf-profile.self.cycles-pp.rb_insert_color
56920 +11.1% 63217 proc-vmstat.nr_active_file
310882 +4.5% 324815 proc-vmstat.nr_dirtied
92004 -1.4% 90692 proc-vmstat.nr_inactive_file
310881 +4.5% 324835 proc-vmstat.nr_written
56920 +11.1% 63217 proc-vmstat.nr_zone_active_file
92004 -1.4% 90692 proc-vmstat.nr_zone_inactive_file
3016573 -1.5% 2972170 proc-vmstat.numa_hit
2900948 -1.5% 2856545 proc-vmstat.numa_local
33840 +23.7% 41875 proc-vmstat.pgactivate
3015858 -1.5% 2971833 proc-vmstat.pgalloc_normal
3308005 -1.8% 3249952 proc-vmstat.pgfault
2443928 +4.6% 2555340 proc-vmstat.pgpgout
216996 -2.6% 211295 proc-vmstat.pgreuse
***************************************************************************************************
lkp-icl-2sp6: 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz with 128G memory
=========================================================================================
compiler/cpufreq_governor/disk/filesize/fs2/fs/iterations/kconfig/nr_files_per_directory/nr_threads/rootfs/sync_method/tbox_group/test_size/testcase/ucode:
gcc-9/performance/1HDD/4K/nfsv4/btrfs/1x/x86_64-rhel-8.3/1fpd/1t/debian-10.4-x86_64-20200603.cgz/fsyncBeforeClose/lkp-icl-2sp6/80M/fsmark/0xd000280
commit:
950575c023 ("btrfs: only use ->max_extent_size if it is set in the bitmap")
59c7b566a3 ("btrfs: index free space entries on size")
950575c023aabfea 59c7b566a3b653fe7865cef007c
---------------- ---------------------------
%stddev %change %stddev
\ | \
18.55 +1.7% 18.87 fsmark.files_per_sec
1106 -2.0% 1083 fsmark.time.elapsed_time
1106 -2.0% 1083 fsmark.time.elapsed_time.max
228765 +10.9% 253797 meminfo.Active(file)
0.07 ? 19% +0.0 0.10 ? 14% perf-profile.children.cycles-pp.lookup_fast
1.227e+12 -11.4% 1.087e+12 ? 10% perf-stat.total.instructions
2197 +6.7% 2344 vmstat.io.bo
189708 ? 15% -24.0% 144249 ? 23% softirqs.CPU113.RCU
137124 ? 5% -7.2% 127278 ? 8% softirqs.CPU12.SCHED
188297 ? 14% -21.4% 147999 ? 17% softirqs.CPU125.RCU
176548 ? 19% -23.8% 134459 ? 18% softirqs.CPU49.RCU
130.50 ?202% +10818.3% 14248 ?165% softirqs.CPU58.TIMER
140699 ? 4% -11.3% 124735 ? 8% softirqs.CPU9.SCHED
177106 ? 9% -21.6% 138881 ? 19% softirqs.CPU99.RCU
57198 +10.9% 63447 proc-vmstat.nr_active_file
330596 +4.1% 344271 proc-vmstat.nr_dirtied
102678 -1.3% 101345 proc-vmstat.nr_inactive_file
330121 +4.2% 344016 proc-vmstat.nr_written
57198 +10.9% 63447 proc-vmstat.nr_zone_active_file
102678 -1.3% 101345 proc-vmstat.nr_zone_inactive_file
3196397 -1.7% 3140919 proc-vmstat.numa_hit
3080868 -1.8% 3025410 proc-vmstat.numa_local
35571 +20.1% 42718 ? 2% proc-vmstat.pgactivate
3196137 -1.7% 3140466 proc-vmstat.pgalloc_normal
3318150 -1.9% 3256429 proc-vmstat.pgfault
2938572 -1.9% 2883130 proc-vmstat.pgfree
2437420 +4.6% 2548460 proc-vmstat.pgpgout
***************************************************************************************************
lkp-snr-a1: 24 threads 1 sockets Intel Atom(R) P5362 processor with 64G memory
=========================================================================================
compiler/cpufreq_governor/directio/disk/fstype/kconfig/media/rootfs/tbox_group/test/testcase/ucode:
gcc-9/performance/directio/1SSD/btrfs/x86_64-rhel-8.3/ssd/debian-10.4-x86_64-20200603.cgz/lkp-snr-a1/DWSL/fxmark/0x9c02000e
commit:
950575c023 ("btrfs: only use ->max_extent_size if it is set in the bitmap")
59c7b566a3 ("btrfs: index free space entries on size")
950575c023aabfea 59c7b566a3b653fe7865cef007c
---------------- ---------------------------
%stddev %change %stddev
\ | \
0.03 ? 34% +73.2% 0.05 ? 19% fxmark.ssd_btrfs_DWSL_1_directio.idle_util
27.52 +13.0% 31.10 fxmark.ssd_btrfs_DWSL_1_directio.iowait_sec
57.76 +11.8% 64.59 fxmark.ssd_btrfs_DWSL_1_directio.iowait_util
1.01 +16.9% 1.18 ? 2% fxmark.ssd_btrfs_DWSL_1_directio.softirq_sec
2.11 +15.7% 2.44 fxmark.ssd_btrfs_DWSL_1_directio.softirq_util
14.95 -23.3% 11.47 ? 3% fxmark.ssd_btrfs_DWSL_1_directio.sys_sec
31.37 -24.1% 23.82 ? 2% fxmark.ssd_btrfs_DWSL_1_directio.sys_util
0.33 ? 6% +11.2% 0.36 ? 4% fxmark.ssd_btrfs_DWSL_1_directio.user_sec
0.69 ? 5% +10.1% 0.75 ? 4% fxmark.ssd_btrfs_DWSL_1_directio.user_util
69218 +13.5% 78568 fxmark.ssd_btrfs_DWSL_1_directio.works
1384 +13.5% 1571 fxmark.ssd_btrfs_DWSL_1_directio.works/sec
25.38 +17.5% 29.83 fxmark.ssd_btrfs_DWSL_2_directio.iowait_sec
51.11 +20.7% 61.68 fxmark.ssd_btrfs_DWSL_2_directio.iowait_util
1.18 +15.3% 1.36 ? 4% fxmark.ssd_btrfs_DWSL_2_directio.softirq_sec
2.37 +18.4% 2.81 ? 4% fxmark.ssd_btrfs_DWSL_2_directio.softirq_util
18.65 ? 2% -32.7% 12.56 ? 3% fxmark.ssd_btrfs_DWSL_2_directio.sys_sec
37.56 ? 2% -30.9% 25.96 ? 2% fxmark.ssd_btrfs_DWSL_2_directio.sys_util
18325440 +8.1% 19802032 fxmark.time.file_system_outputs
8.00 -12.5% 7.00 fxmark.time.percent_of_cpu_this_job_got
30.92 -15.7% 26.07 fxmark.time.system_time
871687 +5.2% 916985 fxmark.time.voluntary_context_switches
1284381 +10.9% 1424700 ? 2% cpuidle..usage
10.27 ? 4% +23.5% 12.69 ? 18% uptime.idle
77.33 +4.3% 80.66 ? 2% boot-time.boot
10.22 ? 4% +23.6% 12.63 ? 18% boot-time.idle
23.53 +9.9% 25.86 iostat.cpu.iowait
66.96 -3.4% 64.67 iostat.cpu.system
983679 +14.7% 1128469 turbostat.C1
18.99 +2.7 21.70 ? 3% turbostat.C1%
85161 +2.9% 87620 vmstat.io.bo
12435 +1.6% 12634 vmstat.system.in
179965 -1.1% 178036 proc-vmstat.nr_active_file
5245078 +4.4% 5478042 proc-vmstat.nr_dirtied
5240891 +4.4% 5473553 proc-vmstat.nr_written
179965 -1.1% 178036 proc-vmstat.nr_zone_active_file
810860 ? 7% +36.2% 1104655 ? 2% proc-vmstat.pgactivate
35956 -5.4% 34024 proc-vmstat.pgpgin
32446626 +2.9% 33383512 proc-vmstat.pgpgout
0.96 +44.8% 1.39 perf-stat.i.MPKI
4.001e+08 -9.3% 3.63e+08 perf-stat.i.branch-instructions
1.09 +0.5 1.57 perf-stat.i.branch-miss-rate%
4520376 +22.8% 5552850 perf-stat.i.branch-misses
1408705 +3.3% 1455359 perf-stat.i.cache-misses
1770594 +3.2% 1827269 perf-stat.i.cache-references
1.03 +12.1% 1.16 perf-stat.i.cpi
1.724e+09 -2.7% 1.678e+09 perf-stat.i.cpu-cycles
1837 ? 4% -5.3% 1740 perf-stat.i.cycles-between-cache-misses
0.06 ? 3% +0.0 0.08 ? 13% perf-stat.i.dTLB-load-miss-rate%
376419 ? 3% +19.0% 447993 ? 14% perf-stat.i.dTLB-load-misses
5.875e+08 -9.1% 5.342e+08 perf-stat.i.dTLB-loads
0.01 +0.0 0.01 perf-stat.i.dTLB-store-miss-rate%
3.175e+08 -7.4% 2.938e+08 perf-stat.i.dTLB-stores
2.15e+09 -9.6% 1.943e+09 perf-stat.i.instructions
1.26 -11.4% 1.12 perf-stat.i.ipc
1.72 -2.7% 1.68 perf-stat.i.metric.GHz
1306 -8.7% 1192 perf-stat.i.metric.M/sec
0.82 +14.1% 0.94 perf-stat.overall.MPKI
1.13 +0.4 1.53 perf-stat.overall.branch-miss-rate%
0.80 +7.7% 0.86 perf-stat.overall.cpi
1224 -5.7% 1153 perf-stat.overall.cycles-between-cache-misses
0.06 ? 3% +0.0 0.08 ? 15% perf-stat.overall.dTLB-load-miss-rate%
0.01 +0.0 0.01 perf-stat.overall.dTLB-store-miss-rate%
1.25 -7.1% 1.16 perf-stat.overall.ipc
3.994e+08 -9.3% 3.623e+08 perf-stat.ps.branch-instructions
4513555 +22.8% 5543257 perf-stat.ps.branch-misses
1406314 +3.3% 1452495 perf-stat.ps.cache-misses
1767784 +3.2% 1823979 perf-stat.ps.cache-references
1.721e+09 -2.7% 1.676e+09 perf-stat.ps.cpu-cycles
375835 ? 3% +19.0% 447307 ? 14% perf-stat.ps.dTLB-load-misses
5.865e+08 -9.1% 5.332e+08 perf-stat.ps.dTLB-loads
3.169e+08 -7.5% 2.933e+08 perf-stat.ps.dTLB-stores
2.146e+09 -9.6% 1.94e+09 perf-stat.ps.instructions
8.11e+11 -9.5% 7.341e+11 perf-stat.total.instructions
3.09 ? 2% -1.5 1.55 ? 27% perf-profile.calltrace.cycles-pp.perf_event_output_forward.__perf_event_overflow.perf_swevent_overflow.perf_tp_event.perf_trace_sched_wakeup_template
3.09 ? 2% -1.5 1.56 ? 27% perf-profile.calltrace.cycles-pp.__perf_event_overflow.perf_swevent_overflow.perf_tp_event.perf_trace_sched_wakeup_template.try_to_wake_up
4.74 ? 14% -1.4 3.38 ? 10% perf-profile.calltrace.cycles-pp.__softirqentry_text_start.irq_exit_rcu.common_interrupt.asm_common_interrupt.finish_task_switch
4.73 ? 14% -1.3 3.39 ? 10% perf-profile.calltrace.cycles-pp.irq_exit_rcu.common_interrupt.asm_common_interrupt.finish_task_switch.__schedule
10.84 -1.3 9.51 ? 10% perf-profile.calltrace.cycles-pp.get_perf_callchain.perf_callchain.perf_prepare_sample.perf_event_output_forward.__perf_event_overflow
10.93 -1.3 9.63 ? 10% perf-profile.calltrace.cycles-pp.perf_callchain.perf_prepare_sample.perf_event_output_forward.__perf_event_overflow.perf_swevent_overflow
20.48 ? 2% -1.2 19.23 ? 3% perf-profile.calltrace.cycles-pp.btrfs_sync_log.btrfs_sync_file.do_fsync.__x64_sys_fsync.do_syscall_64
11.41 -1.2 10.18 ? 8% perf-profile.calltrace.cycles-pp.perf_prepare_sample.perf_event_output_forward.__perf_event_overflow.perf_swevent_overflow.perf_tp_event
10.26 ? 5% -1.2 9.03 ? 6% perf-profile.calltrace.cycles-pp.wait_log_commit.btrfs_sync_log.btrfs_sync_file.do_fsync.__x64_sys_fsync
9.51 ? 4% -1.2 8.33 ? 5% perf-profile.calltrace.cycles-pp.schedule.wait_log_commit.btrfs_sync_log.btrfs_sync_file.do_fsync
47.54 -1.2 46.38 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.fsync
9.45 ? 4% -1.2 8.30 ? 5% perf-profile.calltrace.cycles-pp.__schedule.schedule.wait_log_commit.btrfs_sync_log.btrfs_sync_file
48.39 -1.2 47.24 perf-profile.calltrace.cycles-pp.fsync
47.49 -1.1 46.35 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.fsync
47.12 -1.1 45.98 perf-profile.calltrace.cycles-pp.do_fsync.__x64_sys_fsync.do_syscall_64.entry_SYSCALL_64_after_hwframe.fsync
8.23 ? 2% -1.1 7.10 ? 14% perf-profile.calltrace.cycles-pp.perf_callchain_kernel.get_perf_callchain.perf_callchain.perf_prepare_sample.perf_event_output_forward
46.98 -1.1 45.86 perf-profile.calltrace.cycles-pp.btrfs_sync_file.do_fsync.__x64_sys_fsync.do_syscall_64.entry_SYSCALL_64_after_hwframe
47.14 -1.1 46.03 perf-profile.calltrace.cycles-pp.__x64_sys_fsync.do_syscall_64.entry_SYSCALL_64_after_hwframe.fsync
4.45 ? 9% -1.0 3.44 ? 9% perf-profile.calltrace.cycles-pp.finish_task_switch.__schedule.schedule.wait_log_commit.btrfs_sync_log
3.77 ? 11% -0.9 2.85 ? 4% perf-profile.calltrace.cycles-pp.asm_common_interrupt.finish_task_switch.__schedule.schedule.wait_log_commit
1.93 ? 23% -0.9 1.03 ? 34% perf-profile.calltrace.cycles-pp.queue_work_on.btrfs_mark_ordered_io_finished.btrfs_dio_private_put.btrfs_end_bio.blk_update_request
1.99 ? 22% -0.7 1.24 ? 23% perf-profile.calltrace.cycles-pp.btrfs_mark_ordered_io_finished.btrfs_dio_private_put.btrfs_end_bio.blk_update_request.scsi_end_request
5.35 ? 7% -0.7 4.63 ? 4% perf-profile.calltrace.cycles-pp.common_interrupt.asm_common_interrupt.finish_task_switch.__schedule.schedule
1.62 ? 11% -0.7 0.96 ? 32% perf-profile.calltrace.cycles-pp.__queue_work.queue_work_on.btrfs_mark_ordered_io_finished.btrfs_dio_private_put.btrfs_end_bio
1.58 ? 10% -0.6 0.95 ? 32% perf-profile.calltrace.cycles-pp.try_to_wake_up.__queue_work.queue_work_on.btrfs_mark_ordered_io_finished.btrfs_dio_private_put
2.19 ? 21% -0.6 1.60 ? 15% perf-profile.calltrace.cycles-pp.try_to_wake_up.wake_up_q.rwsem_wake.unlock_up.btrfs_search_slot
2.21 ? 21% -0.6 1.61 ? 15% perf-profile.calltrace.cycles-pp.wake_up_q.rwsem_wake.unlock_up.btrfs_search_slot.btrfs_insert_empty_items
2.23 ? 20% -0.6 1.64 ? 15% perf-profile.calltrace.cycles-pp.rwsem_wake.unlock_up.btrfs_search_slot.btrfs_insert_empty_items.btrfs_csum_file_blocks
2.24 ? 19% -0.6 1.66 ? 14% perf-profile.calltrace.cycles-pp.unlock_up.btrfs_search_slot.btrfs_insert_empty_items.btrfs_csum_file_blocks.log_csums
0.84 ? 19% -0.4 0.43 ? 74% perf-profile.calltrace.cycles-pp.btrfs_check_node.csum_one_extent_buffer.btree_csum_one_bio.btrfs_submit_metadata_bio.submit_one_bio
0.64 ? 7% -0.3 0.35 ? 70% perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_csums_range.log_one_extent.btrfs_log_changed_extents.btrfs_log_inode
1.23 ? 8% -0.3 0.95 ? 9% perf-profile.calltrace.cycles-pp.btrfs_lookup_csums_range.log_one_extent.btrfs_log_changed_extents.btrfs_log_inode.btrfs_log_inode_parent
0.81 ? 13% -0.1 0.68 ? 13% perf-profile.calltrace.cycles-pp.perf_session__deliver_event.__ordered_events__flush.perf_session__process_user_event.process_simple.perf_session__process_events
0.81 ? 13% -0.1 0.69 ? 13% perf-profile.calltrace.cycles-pp.perf_session__process_user_event.process_simple.perf_session__process_events.record__finish_output.cmd_record
0.81 ? 13% -0.1 0.69 ? 13% perf-profile.calltrace.cycles-pp.__ordered_events__flush.perf_session__process_user_event.process_simple.perf_session__process_events.record__finish_output
1.08 ? 3% -0.1 0.96 ? 12% perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_log_inode.btrfs_log_inode_parent.btrfs_log_dentry_safe
0.70 ? 3% -0.1 0.63 ? 2% perf-profile.calltrace.cycles-pp.memmove.memmove_extent_buffer.btrfs_del_items.btrfs_drop_extents.log_one_extent
0.69 -0.0 0.64 ? 3% perf-profile.calltrace.cycles-pp.write_all_supers.btrfs_sync_log.btrfs_sync_file.do_fsync.__x64_sys_fsync
0.92 ? 9% +0.1 1.06 ? 9% perf-profile.calltrace.cycles-pp.__btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_insert_empty_items.btrfs_csum_file_blocks
0.93 ? 10% +0.1 1.07 ? 8% perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_insert_empty_items.btrfs_csum_file_blocks.log_csums
0.60 ? 9% +0.2 0.77 ? 10% perf-profile.calltrace.cycles-pp.find_free_extent.btrfs_reserve_extent.btrfs_get_blocks_direct_write.btrfs_dio_iomap_begin.iomap_iter
0.77 ? 11% +0.2 0.99 ? 18% perf-profile.calltrace.cycles-pp.enqueue_entity.enqueue_task_fair.ttwu_do_activate.try_to_wake_up.wake_up_q
0.81 ? 12% +0.2 1.05 ? 19% perf-profile.calltrace.cycles-pp.enqueue_task_fair.ttwu_do_activate.try_to_wake_up.wake_up_q.rwsem_wake
0.17 ?141% +0.4 0.54 ? 3% perf-profile.calltrace.cycles-pp.rwsem_down_write_slowpath.__btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent
0.18 ?141% +0.4 0.58 perf-profile.calltrace.cycles-pp.__btrfs_tree_lock.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_drop_extents
0.18 ?141% +0.4 0.58 perf-profile.calltrace.cycles-pp.btrfs_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_drop_extents.log_one_extent
0.59 ? 6% +0.4 1.04 ? 52% perf-profile.calltrace.cycles-pp.rwsem_down_read_slowpath.__btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_insert_empty_items
0.61 ? 6% +0.5 1.06 ? 50% perf-profile.calltrace.cycles-pp.__btrfs_tree_read_lock.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_insert_empty_items.btrfs_csum_file_blocks
0.61 ? 6% +0.5 1.07 ? 50% perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_insert_empty_items.btrfs_csum_file_blocks.log_csums
2.38 ? 24% +0.9 3.24 ? 13% perf-profile.calltrace.cycles-pp.__blk_mq_sched_dispatch_requests.blk_mq_sched_dispatch_requests.__blk_mq_run_hw_queue.__blk_mq_delay_run_hw_queue.blk_mq_sched_insert_requests
2.39 ? 24% +0.9 3.27 ? 13% perf-profile.calltrace.cycles-pp.blk_mq_sched_dispatch_requests.__blk_mq_run_hw_queue.__blk_mq_delay_run_hw_queue.blk_mq_sched_insert_requests.blk_mq_flush_plug_list
2.34 ? 24% +0.9 3.22 ? 14% perf-profile.calltrace.cycles-pp.__blk_mq_do_dispatch_sched.__blk_mq_sched_dispatch_requests.blk_mq_sched_dispatch_requests.__blk_mq_run_hw_queue.__blk_mq_delay_run_hw_queue
1.35 ? 20% +0.9 2.24 ? 24% perf-profile.calltrace.cycles-pp.scsi_queue_rq.blk_mq_dispatch_rq_list.__blk_mq_do_dispatch_sched.__blk_mq_sched_dispatch_requests.blk_mq_sched_dispatch_requests
2.41 ? 23% +0.9 3.34 ? 13% perf-profile.calltrace.cycles-pp.__blk_mq_run_hw_queue.__blk_mq_delay_run_hw_queue.blk_mq_sched_insert_requests.blk_mq_flush_plug_list.blk_flush_plug
1.48 ? 17% +1.0 2.50 ? 22% perf-profile.calltrace.cycles-pp.blk_mq_dispatch_rq_list.__blk_mq_do_dispatch_sched.__blk_mq_sched_dispatch_requests.blk_mq_sched_dispatch_requests.__blk_mq_run_hw_queue
2.70 ? 21% +1.0 3.73 ? 12% perf-profile.calltrace.cycles-pp.blk_mq_sched_insert_requests.blk_mq_flush_plug_list.blk_flush_plug.blk_finish_plug.__iomap_dio_rw
2.42 ? 23% +1.0 3.47 ? 15% perf-profile.calltrace.cycles-pp.__blk_mq_delay_run_hw_queue.blk_mq_sched_insert_requests.blk_mq_flush_plug_list.blk_flush_plug.blk_finish_plug
2.73 ? 21% +1.1 3.80 ? 11% perf-profile.calltrace.cycles-pp.blk_mq_flush_plug_list.blk_flush_plug.blk_finish_plug.__iomap_dio_rw.iomap_dio_rw
2.74 ? 21% +1.1 3.83 ? 11% perf-profile.calltrace.cycles-pp.blk_flush_plug.blk_finish_plug.__iomap_dio_rw.iomap_dio_rw.btrfs_file_write_iter
2.75 ? 21% +1.1 3.89 ? 11% perf-profile.calltrace.cycles-pp.blk_finish_plug.__iomap_dio_rw.iomap_dio_rw.btrfs_file_write_iter.new_sync_write
21.35 ? 3% +1.9 23.29 ? 4% perf-profile.calltrace.cycles-pp.__libc_pwrite
20.48 ? 3% +2.0 22.44 ? 4% perf-profile.calltrace.cycles-pp.ksys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
20.07 ? 3% +2.0 22.07 ? 4% perf-profile.calltrace.cycles-pp.new_sync_write.vfs_write.ksys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe
19.99 ? 3% +2.0 21.99 ? 4% perf-profile.calltrace.cycles-pp.btrfs_file_write_iter.new_sync_write.vfs_write.ksys_pwrite64.do_syscall_64
20.34 ? 3% +2.0 22.35 ? 4% perf-profile.calltrace.cycles-pp.vfs_write.ksys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
20.71 ? 3% +2.0 22.74 ? 4% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
20.74 ? 3% +2.0 22.77 ? 4% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.__libc_pwrite
19.30 ? 3% +2.1 21.38 ? 4% perf-profile.calltrace.cycles-pp.iomap_dio_rw.btrfs_file_write_iter.new_sync_write.vfs_write.ksys_pwrite64
19.27 ? 3% +2.1 21.36 ? 4% perf-profile.calltrace.cycles-pp.__iomap_dio_rw.iomap_dio_rw.btrfs_file_write_iter.new_sync_write.vfs_write
20.49 ? 2% -1.3 19.23 ? 3% perf-profile.children.cycles-pp.btrfs_sync_log
10.27 ? 5% -1.2 9.04 ? 6% perf-profile.children.cycles-pp.wait_log_commit
47.12 -1.1 45.98 perf-profile.children.cycles-pp.do_fsync
48.46 -1.1 47.32 perf-profile.children.cycles-pp.fsync
46.99 -1.1 45.87 perf-profile.children.cycles-pp.btrfs_sync_file
47.14 -1.1 46.03 perf-profile.children.cycles-pp.__x64_sys_fsync
2.44 ? 18% -0.5 1.90 ? 11% perf-profile.children.cycles-pp.unlock_up
5.80 -0.5 5.33 ? 6% perf-profile.children.cycles-pp.__unwind_start
3.20 ? 2% -0.4 2.79 ? 7% perf-profile.children.cycles-pp.perf_output_sample
4.63 ? 7% -0.3 4.30 ? 6% perf-profile.children.cycles-pp.wake_up_q
2.47 -0.3 2.16 ? 6% perf-profile.children.cycles-pp.memcpy_erms
1.23 ? 8% -0.3 0.95 ? 9% perf-profile.children.cycles-pp.btrfs_lookup_csums_range
0.84 ? 18% -0.3 0.58 ? 24% perf-profile.children.cycles-pp.btrfs_check_node
0.49 ? 40% -0.2 0.28 ? 34% perf-profile.children.cycles-pp.build_id__mark_dso_hit
0.49 ? 40% -0.2 0.28 ? 34% perf-profile.children.cycles-pp.thread__find_map
0.49 ? 40% -0.2 0.28 ? 34% perf-profile.children.cycles-pp.map__load
0.49 ? 40% -0.2 0.28 ? 34% perf-profile.children.cycles-pp.dso__load
0.48 ? 39% -0.2 0.28 ? 36% perf-profile.children.cycles-pp.__dso__load_kallsyms
0.45 ? 23% -0.2 0.26 ? 14% perf-profile.children.cycles-pp.fixup_exception
2.26 ? 3% -0.2 2.08 ? 5% perf-profile.children.cycles-pp.perf_output_copy
2.62 ? 3% -0.2 2.45 ? 5% perf-profile.children.cycles-pp.kernel_text_address
0.72 ? 6% -0.2 0.56 ? 16% perf-profile.children.cycles-pp.down_read
0.39 ? 25% -0.2 0.23 ? 12% perf-profile.children.cycles-pp.search_exception_tables
0.39 ? 25% -0.2 0.23 ? 12% perf-profile.children.cycles-pp.search_extable
0.38 ? 26% -0.2 0.22 ? 8% perf-profile.children.cycles-pp.bsearch
0.42 ? 28% -0.1 0.27 ? 38% perf-profile.children.cycles-pp.kallsyms__parse
1.56 ? 7% -0.1 1.43 perf-profile.children.cycles-pp.__module_address
0.34 ? 16% -0.1 0.21 ? 35% perf-profile.children.cycles-pp.is_bpf_text_address
0.81 ? 13% -0.1 0.69 ? 13% perf-profile.children.cycles-pp.perf_session__process_user_event
0.81 ? 13% -0.1 0.69 ? 13% perf-profile.children.cycles-pp.__ordered_events__flush
0.83 ? 12% -0.1 0.71 ? 12% perf-profile.children.cycles-pp.machines__deliver_event
0.31 ? 12% -0.1 0.20 ? 24% perf-profile.children.cycles-pp.write_extent_buffer
0.39 ? 9% -0.1 0.28 ? 27% perf-profile.children.cycles-pp.do_user_addr_fault
0.34 ? 8% -0.1 0.23 ? 16% perf-profile.children.cycles-pp.__kmalloc
0.42 ? 11% -0.1 0.34 ? 8% perf-profile.children.cycles-pp.main_work
0.25 ? 13% -0.1 0.17 ? 23% perf-profile.children.cycles-pp.___slab_alloc
0.30 ? 4% -0.1 0.22 ? 16% perf-profile.children.cycles-pp.new_sync_read
0.18 ? 25% -0.1 0.10 ? 24% perf-profile.children.cycles-pp.perf_trace_buf_update
0.38 ? 13% -0.1 0.31 ? 3% perf-profile.children.cycles-pp.cpuacct_charge
0.11 ? 12% -0.1 0.04 ? 70% perf-profile.children.cycles-pp.setlocale
0.21 ? 9% -0.1 0.15 ? 22% perf-profile.children.cycles-pp.bprm_execve
0.17 ? 29% -0.1 0.10 ? 29% perf-profile.children.cycles-pp.percpu_counter_add_batch
0.16 ? 12% -0.1 0.10 ? 9% perf-profile.children.cycles-pp.get_stack_info
0.33 ? 2% -0.1 0.26 ? 17% perf-profile.children.cycles-pp.__list_del_entry_valid
0.41 ? 9% -0.1 0.35 ? 2% perf-profile.children.cycles-pp.native_sched_clock
0.26 -0.1 0.20 ? 12% perf-profile.children.cycles-pp.pipe_read
0.31 ? 12% -0.0 0.26 ? 5% perf-profile.children.cycles-pp.rcu_gp_kthread
0.10 ? 12% -0.0 0.05 ? 71% perf-profile.children.cycles-pp.scsi_complete
0.25 ? 16% -0.0 0.20 ? 21% perf-profile.children.cycles-pp.insert_state
0.20 ? 12% -0.0 0.16 ? 13% perf-profile.children.cycles-pp.error_entry
0.08 ? 5% -0.0 0.04 ? 70% perf-profile.children.cycles-pp.filemap_map_pages
0.69 -0.0 0.64 ? 3% perf-profile.children.cycles-pp.write_all_supers
0.11 ? 15% -0.0 0.07 ? 20% perf-profile.children.cycles-pp.blk_mq_sched_try_merge
0.09 ? 13% -0.0 0.06 ? 8% perf-profile.children.cycles-pp.blk_mq_run_hw_queue
0.10 ? 12% +0.0 0.13 ? 12% perf-profile.children.cycles-pp.btrfs_fdatawrite_range
0.06 ? 7% +0.0 0.09 ? 5% perf-profile.children.cycles-pp.scsi_init_command
0.07 ? 14% +0.0 0.10 ? 9% perf-profile.children.cycles-pp.do_anonymous_page
0.04 ? 71% +0.0 0.08 ? 10% perf-profile.children.cycles-pp.filemap_range_has_page
0.25 ? 9% +0.0 0.29 ? 10% perf-profile.children.cycles-pp.swake_up_one
0.02 ?141% +0.1 0.07 ? 14% perf-profile.children.cycles-pp.slab_show
0.02 ?141% +0.1 0.07 ? 23% perf-profile.children.cycles-pp.xas_find
0.17 ? 12% +0.1 0.23 ? 19% perf-profile.children.cycles-pp.__switch_to_asm
0.04 ? 71% +0.1 0.11 ? 19% perf-profile.children.cycles-pp.btrfs_verify_level_key
0.00 +0.1 0.06 ? 19% perf-profile.children.cycles-pp.btrfs_get_ordered_extents_for_logging
0.17 ? 2% +0.1 0.23 ? 14% perf-profile.children.cycles-pp.irqentry_exit_to_user_mode
0.03 ?141% +0.1 0.10 ? 19% perf-profile.children.cycles-pp.lock_timer_base
0.02 ?141% +0.1 0.09 ? 24% perf-profile.children.cycles-pp.follow_page_mask
0.02 ?141% +0.1 0.09 ? 15% perf-profile.children.cycles-pp.btrfs_get_8
0.52 ? 6% +0.1 0.59 ? 6% perf-profile.children.cycles-pp.find_next_csum_offset
0.35 ? 10% +0.1 0.42 ? 8% perf-profile.children.cycles-pp.swake_up_locked
0.15 ? 18% +0.1 0.22 ? 13% perf-profile.children.cycles-pp.scsi_alloc_sgtables
0.06 ? 8% +0.1 0.13 ? 30% perf-profile.children.cycles-pp.__blk_rq_map_sg
0.00 +0.1 0.08 ? 16% perf-profile.children.cycles-pp.generic_write_checks
0.00 +0.1 0.08 ? 17% perf-profile.children.cycles-pp.blk_mq_start_request
0.11 ? 7% +0.1 0.19 ? 26% perf-profile.children.cycles-pp.walk_component
0.14 ? 18% +0.1 0.22 ? 7% perf-profile.children.cycles-pp.vfs_statx
0.10 ? 4% +0.1 0.19 ? 17% perf-profile.children.cycles-pp.filename_lookup
0.10 ? 4% +0.1 0.19 ? 17% perf-profile.children.cycles-pp.path_lookupat
0.19 ? 22% +0.1 0.28 ? 5% perf-profile.children.cycles-pp.btrfs_find_space_for_alloc
0.16 ? 13% +0.1 0.25 ? 19% perf-profile.children.cycles-pp.irqtime_account_irq
0.43 ? 5% +0.1 0.52 ? 6% perf-profile.children.cycles-pp.core_kernel_text
0.15 ? 30% +0.1 0.25 ? 13% perf-profile.children.cycles-pp.nsinfo__new
0.14 ? 18% +0.1 0.24 ? 11% perf-profile.children.cycles-pp.__do_sys_newstat
0.17 ? 29% +0.1 0.27 ? 12% perf-profile.children.cycles-pp.____machine__findnew_thread
0.14 ? 18% +0.1 0.24 ? 6% perf-profile.children.cycles-pp.__xstat64
0.11 ? 4% +0.1 0.22 ? 14% perf-profile.children.cycles-pp.user_path_at_empty
0.15 ? 30% +0.1 0.26 ? 14% perf-profile.children.cycles-pp.thread__new
1.56 ? 2% +0.2 1.72 ? 7% perf-profile.children.cycles-pp.rwsem_down_write_slowpath
3.57 ? 3% +0.2 3.74 ? 2% perf-profile.children.cycles-pp.autoremove_wake_function
0.58 ? 16% +0.2 0.78 ? 10% perf-profile.children.cycles-pp.__might_resched
0.68 ? 5% +0.2 0.89 ? 11% perf-profile.children.cycles-pp.find_free_extent
1.69 ? 4% +0.2 1.92 ? 7% perf-profile.children.cycles-pp.btrfs_lock_root_node
0.70 ? 9% +0.3 1.03 ? 19% perf-profile.children.cycles-pp.__irqentry_text_start
0.26 ? 26% +0.4 0.70 ? 62% perf-profile.children.cycles-pp.sd_setup_read_write_cmnd
5.39 ? 4% +0.4 5.84 ? 3% perf-profile.children.cycles-pp.iomap_dio_bio_end_io
1.48 ? 16% +0.9 2.38 ? 23% perf-profile.children.cycles-pp.scsi_queue_rq
2.43 ? 23% +0.9 3.36 ? 13% perf-profile.children.cycles-pp.__blk_mq_do_dispatch_sched
2.58 ? 20% +0.9 3.51 ? 13% perf-profile.children.cycles-pp.__blk_mq_sched_dispatch_requests
2.60 ? 20% +0.9 3.54 ? 13% perf-profile.children.cycles-pp.blk_mq_sched_dispatch_requests
2.61 ? 20% +1.0 3.61 ? 13% perf-profile.children.cycles-pp.__blk_mq_run_hw_queue
1.64 ? 12% +1.0 2.68 ? 20% perf-profile.children.cycles-pp.blk_mq_dispatch_rq_list
2.78 ? 21% +1.1 3.86 ? 11% perf-profile.children.cycles-pp.blk_mq_sched_insert_requests
2.62 ? 20% +1.1 3.73 ? 14% perf-profile.children.cycles-pp.__blk_mq_delay_run_hw_queue
2.81 ? 20% +1.1 3.93 ? 10% perf-profile.children.cycles-pp.blk_mq_flush_plug_list
2.84 ? 20% +1.1 3.98 ? 11% perf-profile.children.cycles-pp.blk_flush_plug
2.85 ? 20% +1.2 4.05 ? 11% perf-profile.children.cycles-pp.blk_finish_plug
21.52 ? 2% +1.9 23.38 ? 3% perf-profile.children.cycles-pp.new_sync_write
21.79 ? 2% +1.9 23.68 ? 3% perf-profile.children.cycles-pp.vfs_write
20.48 ? 3% +2.0 22.44 ? 4% perf-profile.children.cycles-pp.ksys_pwrite64
21.40 ? 3% +2.0 23.39 ? 4% perf-profile.children.cycles-pp.__libc_pwrite
20.00 ? 3% +2.0 22.00 ? 4% perf-profile.children.cycles-pp.btrfs_file_write_iter
19.28 ? 3% +2.1 21.36 ? 4% perf-profile.children.cycles-pp.__iomap_dio_rw
19.31 ? 3% +2.1 21.39 ? 4% perf-profile.children.cycles-pp.iomap_dio_rw
2.84 ? 4% -0.4 2.40 ? 3% perf-profile.self.cycles-pp.btrfs_set_token_32
1.60 ? 3% -0.4 1.23 ? 4% perf-profile.self.cycles-pp.btrfs_get_32
2.41 -0.3 2.10 ? 5% perf-profile.self.cycles-pp.memcpy_erms
0.75 ? 2% -0.2 0.58 ? 11% perf-profile.self.cycles-pp.__unwind_start
0.50 ? 7% -0.1 0.37 ? 15% perf-profile.self.cycles-pp.check_leaf
0.17 ? 40% -0.1 0.05 ? 71% perf-profile.self.cycles-pp.kallsyms__parse
1.54 ? 7% -0.1 1.43 perf-profile.self.cycles-pp.__module_address
0.29 ? 16% -0.1 0.18 ? 39% perf-profile.self.cycles-pp.bpf_ksym_find
0.23 ? 25% -0.1 0.13 ? 12% perf-profile.self.cycles-pp.write_extent_buffer
0.22 ? 22% -0.1 0.13 ? 12% perf-profile.self.cycles-pp.bsearch
0.13 ? 32% -0.1 0.05 ? 71% perf-profile.self.cycles-pp.__dd_dispatch_request
0.38 ? 13% -0.1 0.30 ? 5% perf-profile.self.cycles-pp.cpuacct_charge
0.29 -0.1 0.21 ? 23% perf-profile.self.cycles-pp.__list_del_entry_valid
0.25 ? 22% -0.1 0.18 ? 38% perf-profile.self.cycles-pp.ftrace_graph_ret_addr
0.19 ? 22% -0.1 0.13 ? 29% perf-profile.self.cycles-pp.btrfs_root_node
0.13 ? 22% -0.1 0.07 ? 76% perf-profile.self.cycles-pp.__kmalloc
0.40 ? 10% -0.1 0.34 ? 4% perf-profile.self.cycles-pp.native_sched_clock
0.16 ? 15% -0.1 0.11 ? 15% perf-profile.self.cycles-pp.error_entry
0.14 ? 32% -0.1 0.09 ? 5% perf-profile.self.cycles-pp.btrfs_file_write_iter
0.15 ? 8% -0.1 0.10 ? 9% perf-profile.self.cycles-pp.___slab_alloc
0.09 ? 19% -0.0 0.04 ? 70% perf-profile.self.cycles-pp.__blk_mq_get_driver_tag
0.16 ? 13% -0.0 0.11 ? 18% perf-profile.self.cycles-pp.enqueue_entity
0.08 ? 14% -0.0 0.04 ? 71% perf-profile.self.cycles-pp.is_module_text_address
0.08 ? 5% +0.0 0.11 ? 4% perf-profile.self.cycles-pp.btrfs_block_rsv_release
0.08 ? 20% +0.0 0.11 ? 11% perf-profile.self.cycles-pp.btrfs_leaf_free_space
0.04 ? 71% +0.0 0.07 ? 12% perf-profile.self.cycles-pp.schedule_timeout
0.21 ? 2% +0.0 0.25 ? 8% perf-profile.self.cycles-pp.__kernel_text_address
0.17 ? 7% +0.0 0.22 ? 5% perf-profile.self.cycles-pp.perf_trace_sched_stat_runtime
0.02 ?141% +0.0 0.06 ? 13% perf-profile.self.cycles-pp.btrfs_get_extent
0.06 ? 71% +0.1 0.11 ? 14% perf-profile.self.cycles-pp.btrfs_sync_file
0.05 ? 71% +0.1 0.11 ? 28% perf-profile.self.cycles-pp.common_file_perm
0.00 +0.1 0.06 ? 8% perf-profile.self.cycles-pp.crc_1
0.17 ? 12% +0.1 0.23 ? 19% perf-profile.self.cycles-pp.__switch_to_asm
0.10 ? 16% +0.1 0.16 ? 5% perf-profile.self.cycles-pp.dequeue_entity
0.08 ? 11% +0.1 0.14 ? 32% perf-profile.self.cycles-pp.__perf_event_overflow
0.12 ? 36% +0.1 0.19 ? 16% perf-profile.self.cycles-pp.leaf_space_used
0.15 ? 3% +0.1 0.22 ? 11% perf-profile.self.cycles-pp.unlock_up
0.00 +0.1 0.07 ? 20% perf-profile.self.cycles-pp.iomap_dio_bio_end_io
0.09 ? 19% +0.1 0.16 ? 21% perf-profile.self.cycles-pp.blk_mq_dispatch_rq_list
0.02 ?141% +0.1 0.09 ? 18% perf-profile.self.cycles-pp.__blk_rq_map_sg
0.04 ? 71% +0.1 0.11 ? 51% perf-profile.self.cycles-pp.irqtime_account_irq
0.00 +0.1 0.10 ? 21% perf-profile.self.cycles-pp.btrfs_verify_level_key
0.30 ? 22% +0.1 0.41 ? 8% perf-profile.self.cycles-pp.try_to_wake_up
0.08 ? 49% +0.1 0.18 ? 13% perf-profile.self.cycles-pp.perf_swevent_overflow
0.27 ? 10% +0.1 0.38 ? 6% perf-profile.self.cycles-pp.perf_tp_event
0.66 ? 5% +0.1 0.79 ? 4% perf-profile.self.cycles-pp.__schedule
0.05 ? 72% +0.1 0.19 ? 16% perf-profile.self.cycles-pp.perf_event_output_forward
0.49 ? 11% +0.2 0.64 ? 15% perf-profile.self.cycles-pp.__might_resched
0.25 ? 11% +0.2 0.41 ? 11% perf-profile.self.cycles-pp.get_perf_callchain
0.23 ? 42% +0.2 0.47 ? 7% perf-profile.self.cycles-pp.perf_prepare_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.
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/[email protected] Intel Corporation
Thanks,
Oliver Sang