Messages in this thread | | | From | Joel Fernandes <> | Date | Wed, 2 Mar 2022 11:00:27 -0500 | Subject | Re: [PATCH 0/2] tracing: Add a way to have custom events in the tracefs directory |
| |
On Tue, Mar 1, 2022 at 10:28 PM Steven Rostedt <rostedt@goodmis.org> wrote: > > 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
Great! I will test these out / review it in the coming week or so.
Thanks!
- Joel
> > ---- > 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
| |