Hello Matwey, This doesn't answer your question, but did you take a look at perf and it's ability to do trace points? See this link: http://www.brendangregg.com/perf.html#Tracepoints On Sat, Apr 29, 2017 at 12:52 PM, Matwey V. Kornilov <matwey.kornilov@gmail.com> wrote:

Hello,

I am following trace/tracepoints.txt guide to add some tracepoints to already existing kernel module.

I've created include/trace/events/mysubsys.h and added

#include <trace/events/mysubsys.h>

#define CREATE_TRACE_POINTS DEFINE_TRACE(mysubsys_event1); EXPORT_TRACEPOINT_SYMBOL_GPL(mysubsys_event1);

to the module sources. There are symbols *_mysubsys_event1 in module ko file.

The issue is that I don't see my events in /sys/kernel/debug/tracing/events Not even ./mysubsys path here.

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29.04.2017 13:52, Matwey V. Kornilov пишет:

Hello,

I am following trace/tracepoints.txt guide to add some tracepoints to already existing kernel module.

I've created include/trace/events/mysubsys.h and added

#include <trace/events/mysubsys.h>

#define CREATE_TRACE_POINTS DEFINE_TRACE(mysubsys_event1); EXPORT_TRACEPOINT_SYMBOL_GPL(mysubsys_event1);

to the module sources. There are symbols *_mysubsys_event1 in module ko file.

The issue is that I don't see my events in /sys/kernel/debug/tracing/events Not even ./mysubsys path here.

Ok. I found. I had to use TRACE_EVENT() macro to use /sys/kernel/debug/tracing/events interface