Messages in this thread | | | Date | Tue, 01 Mar 2022 22:24:14 -0500 | From | Steven Rostedt <> | Subject | [PATCH 0/2] tracing: Add a way to have custom events in the tracefs directory |
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We would like to have in production a way to record sched wakeups and sched switch, and be able to save the information in a small file with as much available as possible. Currently the wake up and sched switch events are 36 and 64 bytes each (plus a 4 byte ring buffer event header).
By having a custom module tap into the sched switch and waking trace points we can bring those events down to 16 and 14 bytes respectively.
Steven Rostedt (Google) (2): tracing: Allow custom events to be added to the tracefs directory tracing: Add sample code for custom trace events
---- kernel/trace/trace_events.c | 2 + samples/Kconfig | 8 +- samples/Makefile | 1 + samples/trace_events/Makefile | 2 + samples/trace_events/trace_custom_sched.c | 280 ++++++++++++++++++++++++++++++ 5 files changed, 292 insertions(+), 1 deletion(-) create mode 100644 samples/trace_events/trace_custom_sched.c
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