diff options
Diffstat (limited to 'Documentation/trace/histogram.rst')
| -rw-r--r-- | Documentation/trace/histogram.rst | 156 |
1 files changed, 90 insertions, 66 deletions
diff --git a/Documentation/trace/histogram.rst b/Documentation/trace/histogram.rst index 8e95295e39b6..c5cfc6e7baea 100644 --- a/Documentation/trace/histogram.rst +++ b/Documentation/trace/histogram.rst @@ -1993,82 +1993,106 @@ uninterruptible state:: A synthetic event that has a stacktrace field may use it as a key in histogram:: - # echo 'hist:delta.buckets=100,stack.stacktrace:sort=delta' > events/synthetic/block_lat/trigger + # echo 'hist:keys=delta.buckets=100,stack.stacktrace:sort=delta' > events/synthetic/block_lat/trigger # cat events/synthetic/block_lat/hist # event histogram # - # trigger info: hist:keys=delta.buckets=100,stacktrace:vals=hitcount:sort=delta.buckets=100:size=2048 [active] + # trigger info: hist:keys=delta.buckets=100,stack.stacktrace:vals=hitcount:sort=delta.buckets=100:size=2048 [active] # - - { delta: ~ 0-99, stacktrace: - event_hist_trigger+0x464/0x480 - event_triggers_call+0x52/0xe0 - trace_event_buffer_commit+0x193/0x250 - trace_event_raw_event_sched_switch+0xfc/0x150 - __traceiter_sched_switch+0x41/0x60 - __schedule+0x448/0x7b0 - schedule_idle+0x26/0x40 - cpu_startup_entry+0x19/0x20 - start_secondary+0xed/0xf0 - secondary_startup_64_no_verify+0xe0/0xeb - } hitcount: 6 - { delta: ~ 0-99, stacktrace: - event_hist_trigger+0x464/0x480 - event_triggers_call+0x52/0xe0 - trace_event_buffer_commit+0x193/0x250 - trace_event_raw_event_sched_switch+0xfc/0x150 - __traceiter_sched_switch+0x41/0x60 - __schedule+0x448/0x7b0 - schedule_idle+0x26/0x40 - cpu_startup_entry+0x19/0x20 - __pfx_kernel_init+0x0/0x10 - arch_call_rest_init+0xa/0x24 - start_kernel+0x964/0x98d - secondary_startup_64_no_verify+0xe0/0xeb + { delta: ~ 0-99, stack.stacktrace __schedule+0xa19/0x1520 + schedule+0x6b/0x110 + io_schedule+0x46/0x80 + bit_wait_io+0x11/0x80 + __wait_on_bit+0x4e/0x120 + out_of_line_wait_on_bit+0x8d/0xb0 + __wait_on_buffer+0x33/0x40 + jbd2_journal_commit_transaction+0x155a/0x19b0 + kjournald2+0xab/0x270 + kthread+0xfa/0x130 + ret_from_fork+0x29/0x50 + } hitcount: 1 + { delta: ~ 0-99, stack.stacktrace __schedule+0xa19/0x1520 + schedule+0x6b/0x110 + io_schedule+0x46/0x80 + rq_qos_wait+0xd0/0x170 + wbt_wait+0x9e/0xf0 + __rq_qos_throttle+0x25/0x40 + blk_mq_submit_bio+0x2c3/0x5b0 + __submit_bio+0xff/0x190 + submit_bio_noacct_nocheck+0x25b/0x2b0 + submit_bio_noacct+0x20b/0x600 + submit_bio+0x28/0x90 + ext4_bio_write_page+0x1e0/0x8c0 + mpage_submit_page+0x60/0x80 + mpage_process_page_bufs+0x16c/0x180 + mpage_prepare_extent_to_map+0x23f/0x530 + } hitcount: 1 + { delta: ~ 0-99, stack.stacktrace __schedule+0xa19/0x1520 + schedule+0x6b/0x110 + schedule_hrtimeout_range_clock+0x97/0x110 + schedule_hrtimeout_range+0x13/0x20 + usleep_range_state+0x65/0x90 + __intel_wait_for_register+0x1c1/0x230 [i915] + intel_psr_wait_for_idle_locked+0x171/0x2a0 [i915] + intel_pipe_update_start+0x169/0x360 [i915] + intel_update_crtc+0x112/0x490 [i915] + skl_commit_modeset_enables+0x199/0x600 [i915] + intel_atomic_commit_tail+0x7c4/0x1080 [i915] + intel_atomic_commit_work+0x12/0x20 [i915] + process_one_work+0x21c/0x3f0 + worker_thread+0x50/0x3e0 + kthread+0xfa/0x130 } hitcount: 3 - { delta: ~ 0-99, stacktrace: - event_hist_trigger+0x464/0x480 - event_triggers_call+0x52/0xe0 - trace_event_buffer_commit+0x193/0x250 - trace_event_raw_event_sched_switch+0xfc/0x150 - __traceiter_sched_switch+0x41/0x60 - __schedule+0x448/0x7b0 - schedule+0x5a/0xb0 - worker_thread+0xaf/0x380 - kthread+0xe9/0x110 - ret_from_fork+0x2c/0x50 + { delta: ~ 0-99, stack.stacktrace __schedule+0xa19/0x1520 + schedule+0x6b/0x110 + schedule_timeout+0x11e/0x160 + __wait_for_common+0x8f/0x190 + wait_for_completion+0x24/0x30 + __flush_work.isra.0+0x1cc/0x360 + flush_work+0xe/0x20 + drm_mode_rmfb+0x18b/0x1d0 [drm] + drm_mode_rmfb_ioctl+0x10/0x20 [drm] + drm_ioctl_kernel+0xb8/0x150 [drm] + drm_ioctl+0x243/0x560 [drm] + __x64_sys_ioctl+0x92/0xd0 + do_syscall_64+0x59/0x90 + entry_SYSCALL_64_after_hwframe+0x72/0xdc } hitcount: 1 - { delta: ~ 100-199, stacktrace: - event_hist_trigger+0x464/0x480 - event_triggers_call+0x52/0xe0 - trace_event_buffer_commit+0x193/0x250 - trace_event_raw_event_sched_switch+0xfc/0x150 - __traceiter_sched_switch+0x41/0x60 - __schedule+0x448/0x7b0 - schedule_idle+0x26/0x40 - cpu_startup_entry+0x19/0x20 - start_secondary+0xed/0xf0 - secondary_startup_64_no_verify+0xe0/0xeb - } hitcount: 15 - [..] - { delta: ~ 8500-8599, stacktrace: - event_hist_trigger+0x464/0x480 - event_triggers_call+0x52/0xe0 - trace_event_buffer_commit+0x193/0x250 - trace_event_raw_event_sched_switch+0xfc/0x150 - __traceiter_sched_switch+0x41/0x60 - __schedule+0x448/0x7b0 - schedule_idle+0x26/0x40 - cpu_startup_entry+0x19/0x20 - start_secondary+0xed/0xf0 - secondary_startup_64_no_verify+0xe0/0xeb + { delta: ~ 0-99, stack.stacktrace __schedule+0xa19/0x1520 + schedule+0x6b/0x110 + schedule_timeout+0x87/0x160 + __wait_for_common+0x8f/0x190 + wait_for_completion_timeout+0x1d/0x30 + drm_atomic_helper_wait_for_flip_done+0x57/0x90 [drm_kms_helper] + intel_atomic_commit_tail+0x8ce/0x1080 [i915] + intel_atomic_commit_work+0x12/0x20 [i915] + process_one_work+0x21c/0x3f0 + worker_thread+0x50/0x3e0 + kthread+0xfa/0x130 + ret_from_fork+0x29/0x50 + } hitcount: 1 + { delta: ~ 100-199, stack.stacktrace __schedule+0xa19/0x1520 + schedule+0x6b/0x110 + schedule_hrtimeout_range_clock+0x97/0x110 + schedule_hrtimeout_range+0x13/0x20 + usleep_range_state+0x65/0x90 + pci_set_low_power_state+0x17f/0x1f0 + pci_set_power_state+0x49/0x250 + pci_finish_runtime_suspend+0x4a/0x90 + pci_pm_runtime_suspend+0xcb/0x1b0 + __rpm_callback+0x48/0x120 + rpm_callback+0x67/0x70 + rpm_suspend+0x167/0x780 + rpm_idle+0x25a/0x380 + pm_runtime_work+0x93/0xc0 + process_one_work+0x21c/0x3f0 } hitcount: 1 Totals: - Hits: 89 - Entries: 11 - Dropped: 0 + Hits: 10 + Entries: 7 + Dropped: 0 2.2.3 Hist trigger 'handlers' and 'actions' ------------------------------------------- |