anchao opened a new pull request #5915: URL: https://github.com/apache/incubator-nuttx/pull/5915
## Summary sched/note: add support of trace section mark The implementation of this feature is based on android systrace: https://source.android.com/devices/tech/debug/ftrace Application developers are more concerned about the performance of the specified application section, added two APIs to implement performance measurement: void sched_note_begin(FAR const char *str); void sched_note_end(FAR const char *str); or SCHED_NOTE_BEGIN(); /* defined to sched_note_begin(__FUNCTION__) */ SCHED_NOTE_END(); /* defined to sched_note_end(__FUNCTION__) */ Signed-off-by: chao.an <anc...@xiaomi.com> ## Impact N/A ## Testing https://source.android.com/devices/tech/debug/ftrace https://github.com/catapult-project/catapult/ test code: ``` void ccc(void) { SCHED_NOTE_BEGIN(); usleep(10); SCHED_NOTE_END(); } void bbb(void) { SCHED_NOTE_BEGIN(); ccc(); SCHED_NOTE_END(); } void aaa(void) { SCHED_NOTE_BEGIN(); bbb(); SCHED_NOTE_END(); } int main(int argc, FAR char *argv[]) { while (1) { SCHED_NOTE_BEGIN(); aaa(); SCHED_NOTE_END(); } return 0; } ```  ## How To Use https://nuttx.apache.org/docs/latest/guides/tasktraceuser.html 1. enable sched instrumentation ``` CONFIG_DRIVER_NOTERAM=y ... CONFIG_SCHED_INSTRUMENTATION=y CONFIG_SCHED_INSTRUMENTATION_SWITCH=y CONFIG_SCHED_INSTRUMENTATION_SYSCALL=y CONFIG_SCHED_INSTRUMENTATION_IRQHANDLER=y CONFIG_SCHED_INSTRUMENTATION_DUMP=y ``` 2. Capture sched note info ``` nsh> trace switch + nsh> trace syscall + nsh> trace start nsh> trace dump ``` 3. convert to systrace https://source.android.com/devices/tech/debug/ftrace If you captured your systrace with --no-compress, this is in the html file in the section beginning with BEGIN TRACE. If not, run html2trace from the [Catapult tree](https://github.com/catapult-project/catapult/tree/master/) (tracing/bin/html2trace) to uncompress the trace. ``` $ git clone g...@github.com:catapult-project/catapult.git $ cd catapult/ $ ./tracing/bin/trace2html trace.txt trace.html ``` [systrace.txt](https://github.com/apache/incubator-nuttx/files/8381565/systrace.txt) 4. open the trace html via web browser: `$ google-chrome trace.html` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
