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Diffstat (limited to 'Documentation/trace/uprobetracer.rst')
| -rw-r--r-- | Documentation/trace/uprobetracer.rst | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/Documentation/trace/uprobetracer.rst b/Documentation/trace/uprobetracer.rst index 4c3bfde2ba47..0b21305fabdc 100644 --- a/Documentation/trace/uprobetracer.rst +++ b/Documentation/trace/uprobetracer.rst @@ -73,10 +73,9 @@ For $comm, the default type is "string"; any other type is invalid. Event Profiling --------------- -You can check the total number of probe hits and probe miss-hits via -/sys/kernel/debug/tracing/uprobe_profile. -The first column is event name, the second is the number of probe hits, -the third is the number of probe miss-hits. +You can check the total number of probe hits per event via +/sys/kernel/debug/tracing/uprobe_profile. The first column is the filename, +the second is the event name, the third is the number of probe hits. Usage examples -------------- @@ -153,10 +152,15 @@ events, you need to enable it by:: # echo 1 > events/uprobes/enable -Lets disable the event after sleeping for some time. +Lets start tracing, sleep for some time and stop tracing. :: + # echo 1 > tracing_on # sleep 20 + # echo 0 > tracing_on + +Also, you can disable the event by:: + # echo 0 > events/uprobes/enable And you can see the traced information via /sys/kernel/debug/tracing/trace. |