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rtla: Add trace_instance_stop

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commit e879b5dcf8 upstream.

Support not only turning trace on for the timerlat tracer, but also
turning it off.

This will be used in subsequent patches to stop the timerlat tracer
without also wiping the trace buffer.

Cc: stable@vger.kernel.org
Cc: John Kacur <jkacur@redhat.com>
Cc: Luis Goncalves <lgoncalv@redhat.com>
Cc: Gabriele Monaco <gmonaco@redhat.com>
Link: https://lore.kernel.org/20250116144931.649593-2-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Glozar
2025-01-16 15:49:27 +01:00
committed by Greg Kroah-Hartman
parent 66e1ca983b
commit 2cf2ddfdeb
2 changed files with 9 additions and 0 deletions
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tools/tracing/rtla/src/trace.c
+8
View File
@@ -196,6 +196,14 @@ int trace_instance_start(struct trace_instance *trace)
return tracefs_trace_on(trace->inst);
}
/*
* trace_instance_stop - stop tracing a given rtla instance
*/
int trace_instance_stop(struct trace_instance *trace)
{
return tracefs_trace_off(trace->inst);
}
/*
* trace_events_free - free a list of trace events
*/
tools/tracing/rtla/src/trace.h
+1
View File
@@ -21,6 +21,7 @@ struct trace_instance {
int trace_instance_init(struct trace_instance *trace, char *tool_name);
int trace_instance_start(struct trace_instance *trace);
int trace_instance_stop(struct trace_instance *trace);
void trace_instance_destroy(struct trace_instance *trace);
struct trace_seq *get_trace_seq(void);