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Message-Id: <20200908044228.61197-4-namhyung@kernel.org>
Date: Tue, 8 Sep 2020 13:42:27 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
Jiri Olsa <jolsa@...hat.com>
Cc: Ingo Molnar <mingo@...nel.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Stephane Eranian <eranian@...gle.com>,
LKML <linux-kernel@...r.kernel.org>,
Andi Kleen <andi@...stfloor.org>,
Ian Rogers <irogers@...gle.com>,
John Garry <john.garry@...wei.com>,
Kajol Jain <kjain@...ux.ibm.com>
Subject: [PATCH 3/4] perf tools: Copy metric events properly when multiply cgroups
The metricgroup__copy_metric_events() is to handle metrics events when
multiplying event for cgroups. As the metric events keep pointers to
evsel, it should be refreshed when events are cloned during the
operation.
The perf_stat__collect_metric_expr() is also called in case an event
has a metric directly.
During the copy, it references evsel by index as the evlist now has
cloned evsels for the given cgroup.
Cc: John Garry <john.garry@...wei.com>
Cc: Kajol Jain <kjain@...ux.ibm.com>
Cc: Ian Rogers <irogers@...gle.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/perf/builtin-stat.c | 3 +-
tools/perf/util/cgroup.c | 15 ++++++-
tools/perf/util/cgroup.h | 4 +-
tools/perf/util/evlist.c | 11 +++++
tools/perf/util/evlist.h | 1 +
tools/perf/util/metricgroup.c | 77 +++++++++++++++++++++++++++++++++++
tools/perf/util/metricgroup.h | 6 +++
7 files changed, 114 insertions(+), 3 deletions(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 6724d23ce2e7..55a7dc175cdf 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -2261,7 +2261,8 @@ int cmd_stat(int argc, const char **argv)
goto out;
if (multiply_cgroup && stat_config.cgroups) {
- if (evlist__multiply_cgroup(evsel_list, stat_config.cgroups) < 0)
+ if (evlist__multiply_cgroup(evsel_list, stat_config.cgroups,
+ &stat_config.metric_events) < 0)
goto out;
}
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index 4892f9496bc2..1ba61b5d66b4 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -3,6 +3,9 @@
#include "evsel.h"
#include "cgroup.h"
#include "evlist.h"
+#include "rblist.h"
+#include "metricgroup.h"
+#include "stat.h"
#include <linux/zalloc.h>
#include <sys/types.h>
#include <sys/stat.h>
@@ -198,10 +201,12 @@ int parse_cgroups(const struct option *opt, const char *str,
return 0;
}
-int evlist__multiply_cgroup(struct evlist *evlist, const char *str)
+int evlist__multiply_cgroup(struct evlist *evlist, const char *str,
+ struct rblist *metric_events)
{
struct evlist *orig_list, *tmp_list;
struct evsel *pos, *evsel, *leader;
+ struct rblist orig_metric_events;
struct cgroup *cgrp = NULL;
const char *p, *e, *eos = str + strlen(str);
int ret = -1;
@@ -221,6 +226,8 @@ int evlist__multiply_cgroup(struct evlist *evlist, const char *str)
/* save original events and init evlist */
perf_evlist__splice_list_tail(orig_list, &evlist->core.entries);
evlist->core.nr_entries = 0;
+ orig_metric_events = *metric_events;
+ rblist__init(metric_events);
for (;;) {
p = strchr(str, ',');
@@ -256,6 +263,11 @@ int evlist__multiply_cgroup(struct evlist *evlist, const char *str)
cgroup__put(cgrp);
nr_cgroups++;
+ perf_stat__collect_metric_expr(tmp_list);
+ if (metricgroup__copy_metric_events(tmp_list, cgrp, metric_events,
+ &orig_metric_events) < 0)
+ break;
+
perf_evlist__splice_list_tail(evlist, &tmp_list->core.entries);
tmp_list->core.nr_entries = 0;
@@ -267,6 +279,7 @@ int evlist__multiply_cgroup(struct evlist *evlist, const char *str)
}
evlist__delete(orig_list);
evlist__delete(tmp_list);
+ rblist__exit(&orig_metric_events);
return ret;
}
diff --git a/tools/perf/util/cgroup.h b/tools/perf/util/cgroup.h
index 9a842f243dfb..87dde992a172 100644
--- a/tools/perf/util/cgroup.h
+++ b/tools/perf/util/cgroup.h
@@ -23,9 +23,11 @@ struct cgroup *cgroup__get(struct cgroup *cgroup);
void cgroup__put(struct cgroup *cgroup);
struct evlist;
+struct rblist;
struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name);
-int evlist__multiply_cgroup(struct evlist *evlist, const char *cgroups);
+int evlist__multiply_cgroup(struct evlist *evlist, const char *cgroups,
+ struct rblist *metric_events);
void evlist__set_default_cgroup(struct evlist *evlist, struct cgroup *cgroup);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index e3fa3bf7498a..457df8ce1fd9 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1866,3 +1866,14 @@ int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd)
return err;
}
+
+struct evsel *evlist__get_evsel(struct evlist *evlist, int idx)
+{
+ struct evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->idx == idx)
+ return evsel;
+ }
+ return NULL;
+}
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index c73f7f7f120b..57f5fd5e6290 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -381,4 +381,5 @@ int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd);
#define EVLIST_ENABLED_MSG "Events enabled\n"
#define EVLIST_DISABLED_MSG "Events disabled\n"
+struct evsel *evlist__get_evsel(struct evlist *evlist, int idx);
#endif /* __PERF_EVLIST_H */
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 8831b964288f..f4a67bf85a7c 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -25,6 +25,7 @@
#include <api/fs/fs.h>
#include "util.h"
#include <asm/bug.h>
+#include "cgroup.h"
struct metric_event *metricgroup__lookup(struct rblist *metric_events,
struct evsel *evsel,
@@ -1104,3 +1105,79 @@ bool metricgroup__has_metric(const char *metric)
}
return false;
}
+
+int metricgroup__copy_metric_events(struct evlist *evlist, struct cgroup *cgrp,
+ struct rblist *new_metric_events,
+ struct rblist *old_metric_events)
+{
+ unsigned i;
+
+ for (i = 0; i < rblist__nr_entries(old_metric_events); i++) {
+ struct rb_node *nd;
+ struct metric_event *old_me, *new_me;
+ struct metric_expr *old_expr, *new_expr;
+ struct evsel *evsel;
+ size_t alloc_size;
+ int idx, nr;
+
+ nd = rblist__entry(old_metric_events, i);
+ old_me = container_of(nd, struct metric_event, nd);
+
+ evsel = evlist__get_evsel(evlist, old_me->evsel->idx);
+ new_me = metricgroup__lookup(new_metric_events, evsel, true);
+ if (!new_me)
+ return -ENOMEM;
+
+ pr_debug("copying metric event for cgroup '%s': %s (idx=%d)\n",
+ cgrp ? cgrp->name : "root", evsel->name, evsel->idx);
+
+ list_for_each_entry(old_expr, &old_me->head, nd) {
+ new_expr = malloc(sizeof(*new_expr));
+ if (!new_expr)
+ return -ENOMEM;
+
+ new_expr->metric_expr = old_expr->metric_expr;
+ new_expr->metric_name = old_expr->metric_name;
+ new_expr->metric_unit = old_expr->metric_unit;
+ new_expr->runtime = old_expr->runtime;
+
+ if (old_expr->metric_refs) {
+ /* calculate number of metric_events */
+ for (nr = 0; old_expr->metric_refs[nr].metric_name; nr++)
+ continue;
+ alloc_size = sizeof(*new_expr->metric_refs);
+ new_expr->metric_refs = calloc(nr + 1, alloc_size);
+ if (!new_expr->metric_refs) {
+ free(new_expr);
+ return -ENOMEM;
+ }
+
+ memcpy(new_expr->metric_refs, old_expr->metric_refs,
+ nr * alloc_size);
+ } else {
+ new_expr->metric_refs = NULL;
+ }
+
+ /* calculate number of metric_events */
+ for (nr = 0; old_expr->metric_events[nr]; nr++)
+ continue;
+ alloc_size = sizeof(*new_expr->metric_events);
+ new_expr->metric_events = calloc(nr + 1, alloc_size);
+ if (!new_expr->metric_events) {
+ free(new_expr->metric_refs);
+ free(new_expr);
+ return -ENOMEM;
+ }
+
+ /* copy evsel in the same position */
+ for (idx = 0; idx < nr; idx++) {
+ evsel = old_expr->metric_events[idx];
+ evsel = evlist__get_evsel(evlist, evsel->idx);
+ new_expr->metric_events[idx] = evsel;
+ }
+
+ list_add(&new_expr->nd, &new_me->head);
+ }
+ }
+ return 0;
+}
diff --git a/tools/perf/util/metricgroup.h b/tools/perf/util/metricgroup.h
index 62623a39cbec..bb9ea9e1ea9a 100644
--- a/tools/perf/util/metricgroup.h
+++ b/tools/perf/util/metricgroup.h
@@ -6,11 +6,13 @@
#include <linux/rbtree.h>
#include <stdbool.h>
+struct evlist;
struct evsel;
struct evlist;
struct option;
struct rblist;
struct pmu_events_map;
+struct cgroup;
struct metric_event {
struct rb_node nd;
@@ -54,4 +56,8 @@ void metricgroup__print(bool metrics, bool groups, char *filter,
bool metricgroup__has_metric(const char *metric);
int arch_get_runtimeparam(void);
void metricgroup__rblist_exit(struct rblist *metric_events);
+
+int metricgroup__copy_metric_events(struct evlist *evlist, struct cgroup *cgrp,
+ struct rblist *new_metric_events,
+ struct rblist *old_metric_events);
#endif
--
2.28.0.526.ge36021eeef-goog
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