diff options
| author | Linus Torvalds | 2019-05-10 13:24:53 -0400 |
|---|---|---|
| committer | Linus Torvalds | 2019-05-10 13:24:53 -0400 |
| commit | 1fb3b526df3bd7647e7854915ae6b22299408baf (patch) | |
| tree | b1fd6c9eaad0b1aff2b1df28ef1d5efcd6d7532a /Documentation/trace/histogram.rst | |
| parent | e290e6af1d22c3f5225c9d46faabdde80e27aef2 (diff) | |
| parent | afbd4d42470e91470bc59040094b89cd717530bd (diff) | |
Merge tag 'docs-5.2a' of git://git.lwn.net/linux
Pull more documentation updates from Jonathan Corbet:
"Some late arriving documentation changes. In particular, this contains
the conversion of the x86 docs to RST, which has been in the works for
some time but needed a couple of final tweaks"
* tag 'docs-5.2a' of git://git.lwn.net/linux: (29 commits)
Documentation: x86: convert x86_64/machinecheck to reST
Documentation: x86: convert x86_64/cpu-hotplug-spec to reST
Documentation: x86: convert x86_64/fake-numa-for-cpusets to reST
Documentation: x86: convert x86_64/5level-paging.txt to reST
Documentation: x86: convert x86_64/mm.txt to reST
Documentation: x86: convert x86_64/uefi.txt to reST
Documentation: x86: convert x86_64/boot-options.txt to reST
Documentation: x86: convert i386/IO-APIC.txt to reST
Documentation: x86: convert usb-legacy-support.txt to reST
Documentation: x86: convert orc-unwinder.txt to reST
Documentation: x86: convert resctrl_ui.txt to reST
Documentation: x86: convert microcode.txt to reST
Documentation: x86: convert pti.txt to reST
Documentation: x86: convert amd-memory-encryption.txt to reST
Documentation: x86: convert intel_mpx.txt to reST
Documentation: x86: convert protection-keys.txt to reST
Documentation: x86: convert pat.txt to reST
Documentation: x86: convert mtrr.txt to reST
Documentation: x86: convert tlb.txt to reST
Documentation: x86: convert zero-page.txt to reST
...
Diffstat (limited to 'Documentation/trace/histogram.rst')
| -rw-r--r-- | Documentation/trace/histogram.rst | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/Documentation/trace/histogram.rst b/Documentation/trace/histogram.rst index f95d94d19c22..ddbaffa530f9 100644 --- a/Documentation/trace/histogram.rst +++ b/Documentation/trace/histogram.rst @@ -1915,7 +1915,10 @@ The following commonly-used handler.action pairs are available: The 'matching.event' specification is simply the fully qualified event name of the event that matches the target event for the - onmatch() functionality, in the form 'system.event_name'. + onmatch() functionality, in the form 'system.event_name'. Histogram + keys of both events are compared to find if events match. In case + multiple histogram keys are used, they all must match in the specified + order. Finally, the number and type of variables/fields in the 'param list' must match the number and types of the fields in the @@ -1978,9 +1981,9 @@ The following commonly-used handler.action pairs are available: /sys/kernel/debug/tracing/events/sched/sched_waking/trigger Then, when the corresponding thread is actually scheduled onto the - CPU by a sched_switch event, calculate the latency and use that - along with another variable and an event field to generate a - wakeup_latency synthetic event:: + CPU by a sched_switch event (saved_pid matches next_pid), calculate + the latency and use that along with another variable and an event field + to generate a wakeup_latency synthetic event:: # echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:\ onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,\ |