[tip: perf/core] perf metricgroup: Scale the metric result
From: tip-bot2 for Jin Yao
Date: Mon Sep 02 2019 - 04:17:20 EST
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 287f2649f791819dd2d8f32f0213c8c521d6dfa0
Gitweb: https://git.kernel.org/tip/287f2649f791819dd2d8f32f0213c8c521d6dfa0
Author: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
AuthorDate: Wed, 28 Aug 2019 13:59:31 +08:00
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Sat, 31 Aug 2019 22:27:52 -03:00
perf metricgroup: Scale the metric result
Some metrics define the scale unit, such as
{
"BriefDescription": "Intel Optane DC persistent memory read latency (ns). Derived from unc_m_pmm_rpq_occupancy.all",
"Counter": "0,1,2,3",
"EventCode": "0xE0",
"EventName": "UNC_M_PMM_READ_LATENCY",
"MetricExpr": "UNC_M_PMM_RPQ_OCCUPANCY.ALL / UNC_M_PMM_RPQ_INSERTS / UNC_M_CLOCKTICKS",
"MetricName": "UNC_M_PMM_READ_LATENCY",
"PerPkg": "1",
"ScaleUnit": "6000000000ns",
"UMask": "0x1",
"Unit": "iMC"
},
For above example, the ratio should be,
ratio = (UNC_M_PMM_RPQ_OCCUPANCY.ALL / UNC_M_PMM_RPQ_INSERTS / UNC_M_CLOCKTICKS) * 6000000000
But in current code, the ratio is not scaled ( * 6000000000)
With this patch, the ratio is scaled and the unit (ns) is printed.
For example,
# 219.4 ns UNC_M_PMM_READ_LATENCY
Signed-off-by: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20190828055932.8269-4-yao.jin@xxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/metricgroup.c | 3 +++-
tools/perf/util/metricgroup.h | 1 +-
tools/perf/util/stat-shadow.c | 38 ++++++++++++++++++++++++----------
3 files changed, 31 insertions(+), 11 deletions(-)
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 33f5e21..f474a29 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -87,6 +87,7 @@ struct egroup {
const char **ids;
const char *metric_name;
const char *metric_expr;
+ const char *metric_unit;
};
static bool record_evsel(int *ind, struct evsel **start,
@@ -182,6 +183,7 @@ static int metricgroup__setup_events(struct list_head *groups,
}
expr->metric_expr = eg->metric_expr;
expr->metric_name = eg->metric_name;
+ expr->metric_unit = eg->metric_unit;
expr->metric_events = metric_events;
list_add(&expr->nd, &me->head);
}
@@ -453,6 +455,7 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
eg->idnum = idnum;
eg->metric_name = pe->metric_name;
eg->metric_expr = pe->metric_expr;
+ eg->metric_unit = pe->unit;
list_add_tail(&eg->nd, group_list);
ret = 0;
}
diff --git a/tools/perf/util/metricgroup.h b/tools/perf/util/metricgroup.h
index e5092f6..475c7f9 100644
--- a/tools/perf/util/metricgroup.h
+++ b/tools/perf/util/metricgroup.h
@@ -20,6 +20,7 @@ struct metric_expr {
struct list_head nd;
const char *metric_expr;
const char *metric_name;
+ const char *metric_unit;
struct evsel **metric_events;
};
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 2ed5e00..696d263 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -715,6 +715,7 @@ static void generic_metric(struct perf_stat_config *config,
struct evsel **metric_events,
char *name,
const char *metric_name,
+ const char *metric_unit,
double avg,
int cpu,
struct perf_stat_output_ctx *out,
@@ -722,7 +723,7 @@ static void generic_metric(struct perf_stat_config *config,
{
print_metric_t print_metric = out->print_metric;
struct parse_ctx pctx;
- double ratio;
+ double ratio, scale;
int i;
void *ctxp = out->ctx;
char *n, *pn;
@@ -732,7 +733,6 @@ static void generic_metric(struct perf_stat_config *config,
for (i = 0; metric_events[i]; i++) {
struct saved_value *v;
struct stats *stats;
- double scale;
if (!strcmp(metric_events[i]->name, "duration_time")) {
stats = &walltime_nsecs_stats;
@@ -762,16 +762,32 @@ static void generic_metric(struct perf_stat_config *config,
if (!metric_events[i]) {
const char *p = metric_expr;
- if (expr__parse(&ratio, &pctx, &p) == 0)
- print_metric(config, ctxp, NULL, "%8.1f",
- metric_name ?
- metric_name :
- out->force_header ? name : "",
- ratio);
- else
+ if (expr__parse(&ratio, &pctx, &p) == 0) {
+ char *unit;
+ char metric_bf[64];
+
+ if (metric_unit && metric_name) {
+ if (perf_pmu__convert_scale(metric_unit,
+ &unit, &scale) >= 0) {
+ ratio *= scale;
+ }
+
+ scnprintf(metric_bf, sizeof(metric_bf),
+ "%s %s", unit, metric_name);
+ print_metric(config, ctxp, NULL, "%8.1f",
+ metric_bf, ratio);
+ } else {
+ print_metric(config, ctxp, NULL, "%8.1f",
+ metric_name ?
+ metric_name :
+ out->force_header ? name : "",
+ ratio);
+ }
+ } else {
print_metric(config, ctxp, NULL, NULL,
out->force_header ?
(metric_name ? metric_name : name) : "", 0);
+ }
} else
print_metric(config, ctxp, NULL, NULL, "", 0);
@@ -992,7 +1008,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
print_metric(config, ctxp, NULL, NULL, name, 0);
} else if (evsel->metric_expr) {
generic_metric(config, evsel->metric_expr, evsel->metric_events, evsel->name,
- evsel->metric_name, avg, cpu, out, st);
+ evsel->metric_name, NULL, avg, cpu, out, st);
} else if (runtime_stat_n(st, STAT_NSECS, 0, cpu) != 0) {
char unit = 'M';
char unit_buf[10];
@@ -1021,7 +1037,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
out->new_line(config, ctxp);
generic_metric(config, mexp->metric_expr, mexp->metric_events,
evsel->name, mexp->metric_name,
- avg, cpu, out, st);
+ mexp->metric_unit, avg, cpu, out, st);
}
}
if (num == 0)