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perf ordered_events: Add first_time() method

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To get the timestamp in the first event in the queue.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Dmitry Levin <ldv@altlinux.org>
Cc: Eugene Syromiatnikov <esyr@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Luis Cláudio Gonçalves <lclaudio@uudg.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/n/tip-appp27jw1ul8kgg872j43r5o@git.kernel.org
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2018-12-06 14:38:52 -03:00 committed by Arnaldo Carvalho de Melo
parent 1f44b3e2fc
commit 83356b3d12
2 changed files with 12 additions and 0 deletions
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11
tools/perf/util/ordered-events.c
View File

@ -343,6 +343,17 @@ int ordered_events__flush_time(struct ordered_events *oe, u64 timestamp)
return __ordered_events__flush(oe, OE_FLUSH__TIME, timestamp);
}
u64 ordered_events__first_time(struct ordered_events *oe)
{
struct ordered_event *event;
if (list_empty(&oe->events))
return 0;
event = list_first_entry(&oe->events, struct ordered_event, list);
return event->timestamp;
}
void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver,
void *data)
{

1
tools/perf/util/ordered-events.h
View File

@ -61,6 +61,7 @@ void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t d
void *data);
void ordered_events__free(struct ordered_events *oe);
void ordered_events__reinit(struct ordered_events *oe);
u64 ordered_events__first_time(struct ordered_events *oe);
static inline
void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)