From fd48aad9b0f3f7654433dfae3a72ceda36e2de28 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Thu, 31 Aug 2017 12:40:34 -0700 Subject: perf stat: Support duration_time for metrics Some of the metrics formulas (like GFLOPs) need to know how long the measurement period is. Support an internal event called duration_time, which reports time in second. It maps to the dummy event, but is special cased for statistics to report the walltime duration. So far it is not printed, but only used internally for metrics. Signed-off-by: Andi Kleen Acked-by: Jiri Olsa Link: http://lkml.kernel.org/r/20170831194036.30146-10-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/stat-shadow.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'tools/perf/util/stat-shadow.c') diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c index 664f49a9b012..a2c12d1ef32a 100644 --- a/tools/perf/util/stat-shadow.c +++ b/tools/perf/util/stat-shadow.c @@ -641,11 +641,20 @@ static void generic_metric(const char *metric_expr, expr__add_id(&pctx, name, avg); for (i = 0; metric_events[i]; i++) { struct saved_value *v; + struct stats *stats; + double scale; - v = saved_value_lookup(metric_events[i], cpu, false); - if (!v) - break; - expr__add_id(&pctx, metric_events[i]->name, avg_stats(&v->stats)); + if (!strcmp(metric_events[i]->name, "duration_time")) { + stats = &walltime_nsecs_stats; + scale = 1e-9; + } else { + v = saved_value_lookup(metric_events[i], cpu, false); + if (!v) + break; + stats = &v->stats; + scale = 1.0; + } + expr__add_id(&pctx, metric_events[i]->name, avg_stats(stats)*scale); } if (!metric_events[i]) { const char *p = metric_expr; -- cgit v1.2.3-59-g8ed1b