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perf tools: Allow out of order messages in forced flush

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In forced flush (OE_FLUSH__HALF) we break the rules of the flush
timestamp via PERF_RECORD_FINISHED_ROUND event, so we could get out of
order event.

Do not force error in this case plus changing the output warning to use
WARN_ONCE.

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-8q8794a8nlmpd1u8xrqmcyd2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2014-06-12 09:50:11 +02:00 • committed by Arnaldo Carvalho de Melo
parent cee3ab9caa
commit b0a45203a7
3 changed files with 15 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

12
tools/perf/util/session.c
View file

@ -14,6 +14,7 @@
#include "util.h"
#include "cpumap.h"
#include "perf_regs.h"
#include "asm/bug.h"
static int perf_session__open(struct perf_session *session)
{
@ -500,10 +501,15 @@ int perf_session_queue_event(struct perf_session *s, union perf_event *event,
return -ETIME;
if (timestamp < oe->last_flush) {
printf("Warning: Timestamp below last timeslice flush\n");
WARN_ONCE(1, "Timestamp below last timeslice flush\n");
pr_oe_time(timestamp, "out of order event");
pr_oe_time(oe->last_flush, "last flush");
return -EINVAL;
pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
oe->last_flush_type);
/* We could get out of order messages after forced flush. */
if (oe->last_flush_type != OE_FLUSH__HALF)
return -EINVAL;
}
new = ordered_events__new(oe, timestamp);