From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>
One of my ftrace tests records tracing data with the counter clock (just
counts by 1 for every event, it is not a time stamp), but the test failed
with the latest trace-cmd, as it was showing the counters as "usecs" and
truncating them:
Instead of:
<idle>-0 [002] 818923: sched_switch: swapper/2:0 [120] R ==> sleep:8298 [120]
<idle>-0 [003] 818924: sched_switch: swapper/3:0 [120] R ==> rb_consumer:47 [139]
<idle>-0 [000] 818925: sched_switch: swapper/0:0 [120] R ==> trace-cmd:8293 [120]
sleep-8298 [002] 818926: sched_switch: sleep:8298 [120] Z ==> swapper/2:0 [120]
It was showing the output like:
sleep-8225 [002] 0.000809: sched_switch: sleep:8225 [120] S ==> swapper/2:0 [120]
<idle>-0 [003] 0.000809: sched_switch: swapper/3:0 [120] R ==> rcu_preempt:13 [120]
rcu_preempt-13 [003] 0.000809: sched_switch: rcu_preempt:13 [120] W ==> swapper/3:0 [120]
<idle>-0 [003] 0.000809: sched_switch: swapper/3:0 [120] R ==> rcu_preempt:13 [120]
When the TRACECLOCK option is found, use it to set the appropriate clock
for trace-cmd.
Fixes: 02dfe3593624 ("trace-cmd library: Initialize CPU data for reading from version 7 trace files")
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
lib/trace-cmd/trace-input.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index 18bb4cf984da..b8705ce364d1 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -3436,6 +3436,7 @@ static int handle_options(struct tracecmd_input *handle)
goto out;
break;
case TRACECMD_OPTION_TRACECLOCK:
+ tracecmd_parse_trace_clock(handle, buf, size);
if (!handle->ts2secs)
handle->use_trace_clock = true;
break;
--
2.35.1
|