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perf tools: Add debug prints for ordered events queue

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Adding some prints for ordered events queue, to help debug issues.

Adding debug_ordered_events debug variable to be able to enable ordered
events debug messages using:

  $ perf --debug ordered-events=2 report ...

Also using oe pointer in perf_session__queue_event instead of chained
session variable dereferencing.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-7p3mnnopjvsp9nmk9msqcfkm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2014-07-11 14:49:54 +02:00
committed by Arnaldo Carvalho de Melo
parent 94786b67b5
commit cee3ab9caa
4 changed files with 72 additions and 2 deletions
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4
tools/perf/util/session.c
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@@ -499,8 +499,10 @@ int perf_session_queue_event(struct perf_session *s, union perf_event *event,
if (!timestamp || timestamp == ~0ULL)
return -ETIME;
if (timestamp < s->ordered_events.last_flush) {
if (timestamp < oe->last_flush) {
printf("Warning: Timestamp below last timeslice flush\n");
pr_oe_time(timestamp, "out of order event");
pr_oe_time(oe->last_flush, "last flush");
return -EINVAL;
}