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| author |   Jiri Olsa <jolsa@kernel.org> | 2014-06-12 09:50:11 +0200 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-08-12 12:03:02 -0300 |
| commit | b0a45203a75a800015828ac89f2945981019b65b (patch) | |
| tree | 18e559b95f140ac387bb35f9b00f0df8ee9c58a6 /tools/perf | |
| parent | perf tools: Add debug prints for ordered events queue (diff) | |
| download | linux-dev-b0a45203a75a800015828ac89f2945981019b65b.tar.xz linux-dev-b0a45203a75a800015828ac89f2945981019b65b.zip | |
perf tools: Allow out of order messages in forced flush
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>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/ordered-events.c | 4 | ||||
| -rw-r--r-- | tools/perf/util/ordered-events.h | 2 | ||||
| -rw-r--r-- | tools/perf/util/session.c | 12 |
3 files changed, 15 insertions, 3 deletions
diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c index 8a8aeab8e7ec..706ce1a66169 100644 --- a/tools/perf/util/ordered-events.c +++ b/tools/perf/util/ordered-events.c @@ -169,6 +169,7 @@ int ordered_events__flush(struct perf_session *s, struct perf_tool *tool, { struct ordered_events *oe = &s->ordered_events; static const char * const str[] = { + "NONE", "FINAL", "ROUND", "HALF ", @@ -198,6 +199,7 @@ int ordered_events__flush(struct perf_session *s, struct perf_tool *tool, } case OE_FLUSH__ROUND: + case OE_FLUSH__NONE: default: break; }; @@ -211,6 +213,8 @@ int ordered_events__flush(struct perf_session *s, struct perf_tool *tool, if (!err) { if (how == OE_FLUSH__ROUND) oe->next_flush = oe->max_timestamp; + + oe->last_flush_type = how; } pr_oe_time(oe->next_flush, "next_flush - ordered_events__flush POST %s, nr_events %u\n", diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h index 2ce847fb48a5..3b2f20542a01 100644 --- a/tools/perf/util/ordered-events.h +++ b/tools/perf/util/ordered-events.h @@ -14,6 +14,7 @@ struct ordered_event { }; enum oe_flush { + OE_FLUSH__NONE, OE_FLUSH__FINAL, OE_FLUSH__ROUND, OE_FLUSH__HALF, @@ -32,6 +33,7 @@ struct ordered_events { struct ordered_event *last; int buffer_idx; unsigned int nr_events; + enum oe_flush last_flush_type; }; struct ordered_event *ordered_events__new(struct ordered_events *oe, u64 timestamp); diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 462be2749462..7e27f1eb260c 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -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); |