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Date: Wed, 2 Mar 2022 20:01:37 +0100
From: Daniel Bristot de Oliveira <bristot@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Daniel Bristot de Oliveira <bristot@...nel.org>,
Jonathan Corbet <corbet@....net>,
Clark Williams <williams@...hat.com>,
Juri Lelli <juri.lelli@...hat.com>, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-trace-devel@...r.kernel.org
Subject: [PATCH V3 12/15] rtla: Check for trace off also in the trace instance
With the addition of --trigger option, it is also possible to stop
the trace from the -t tracing instance using the traceoff trigger.
Make rtla tools to check if the trace is stopped also in the trace
instance, stopping the execution of the tool.
Cc: Daniel Bristot de Oliveira <bristot@...nel.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Jonathan Corbet <corbet@....net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@...nel.org>
---
tools/tracing/rtla/src/osnoise_hist.c | 4 ++--
tools/tracing/rtla/src/osnoise_top.c | 4 ++--
tools/tracing/rtla/src/timerlat_hist.c | 4 ++--
tools/tracing/rtla/src/timerlat_top.c | 4 ++--
tools/tracing/rtla/src/trace.c | 19 +++++++++++++++++++
tools/tracing/rtla/src/trace.h | 1 +
6 files changed, 28 insertions(+), 8 deletions(-)
diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
index f86b5fb94efd..b73b919bd6b4 100644
--- a/tools/tracing/rtla/src/osnoise_hist.c
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -848,7 +848,7 @@ int osnoise_hist_main(int argc, char *argv[])
goto out_hist;
}
- if (!tracefs_trace_is_on(trace->inst))
+ if (trace_is_off(&tool->trace, &record->trace))
break;
};
@@ -858,7 +858,7 @@ int osnoise_hist_main(int argc, char *argv[])
return_value = 0;
- if (!tracefs_trace_is_on(trace->inst)) {
+ if (trace_is_off(&tool->trace, &record->trace)) {
printf("rtla timelat hit stop tracing\n");
if (params->trace_output) {
printf(" Saving trace to %s\n", params->trace_output);
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c
index c3d75ee456a5..fd29a4049322 100644
--- a/tools/tracing/rtla/src/osnoise_top.c
+++ b/tools/tracing/rtla/src/osnoise_top.c
@@ -629,7 +629,7 @@ int osnoise_top_main(int argc, char **argv)
if (!params->quiet)
osnoise_print_stats(params, tool);
- if (!tracefs_trace_is_on(trace->inst))
+ if (trace_is_off(&tool->trace, &record->trace))
break;
} while (!stop_tracing);
@@ -638,7 +638,7 @@ int osnoise_top_main(int argc, char **argv)
return_value = 0;
- if (!tracefs_trace_is_on(trace->inst)) {
+ if (trace_is_off(&tool->trace, &record->trace)) {
printf("osnoise hit stop tracing\n");
if (params->trace_output) {
printf(" Saving trace to %s\n", params->trace_output);
diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c
index 8341f38fd0b1..17188ccb6e8b 100644
--- a/tools/tracing/rtla/src/timerlat_hist.c
+++ b/tools/tracing/rtla/src/timerlat_hist.c
@@ -861,7 +861,7 @@ int timerlat_hist_main(int argc, char *argv[])
goto out_hist;
}
- if (!tracefs_trace_is_on(trace->inst))
+ if (trace_is_off(&tool->trace, &record->trace))
break;
};
@@ -869,7 +869,7 @@ int timerlat_hist_main(int argc, char *argv[])
return_value = 0;
- if (!tracefs_trace_is_on(trace->inst)) {
+ if (trace_is_off(&tool->trace, &record->trace)) {
printf("rtla timelat hit stop tracing\n");
if (params->trace_output) {
printf(" Saving trace to %s\n", params->trace_output);
diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c
index 9ce5a09664bc..bf2a50350e61 100644
--- a/tools/tracing/rtla/src/timerlat_top.c
+++ b/tools/tracing/rtla/src/timerlat_top.c
@@ -655,7 +655,7 @@ int timerlat_top_main(int argc, char *argv[])
if (!params->quiet)
timerlat_print_stats(params, top);
- if (!tracefs_trace_is_on(trace->inst))
+ if (trace_is_off(&top->trace, &record->trace))
break;
};
@@ -664,7 +664,7 @@ int timerlat_top_main(int argc, char *argv[])
return_value = 0;
- if (!tracefs_trace_is_on(trace->inst)) {
+ if (trace_is_off(&top->trace, &record->trace)) {
printf("rtla timelat hit stop tracing\n");
if (params->trace_output) {
printf(" Saving trace to %s\n", params->trace_output);
diff --git a/tools/tracing/rtla/src/trace.c b/tools/tracing/rtla/src/trace.c
index 8249ec4d77cc..5784c9f9e570 100644
--- a/tools/tracing/rtla/src/trace.c
+++ b/tools/tracing/rtla/src/trace.c
@@ -516,3 +516,22 @@ void trace_events_destroy(struct trace_instance *instance,
trace_events_disable(instance, events);
trace_events_free(events);
}
+
+int trace_is_off(struct trace_instance *tool, struct trace_instance *trace)
+{
+ /*
+ * The tool instance is always present, it is the one used to collect
+ * data.
+ */
+ if (!tracefs_trace_is_on(tool->inst))
+ return 1;
+
+ /*
+ * The trace instance is only enabled when -t is set. IOW, when the system
+ * is tracing.
+ */
+ if (trace && !tracefs_trace_is_on(trace->inst))
+ return 1;
+
+ return 0;
+}
diff --git a/tools/tracing/rtla/src/trace.h b/tools/tracing/rtla/src/trace.h
index 51ad344c600b..2e9a89a25615 100644
--- a/tools/tracing/rtla/src/trace.h
+++ b/tools/tracing/rtla/src/trace.h
@@ -47,3 +47,4 @@ int trace_events_enable(struct trace_instance *instance,
int trace_event_add_filter(struct trace_events *event, char *filter);
int trace_event_add_trigger(struct trace_events *event, char *trigger);
+int trace_is_off(struct trace_instance *tool, struct trace_instance *trace);
--
2.34.1
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