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Date: Mon, 11 Jul 2011 15:22:56 +0200
From: Jiri Olsa <jolsa@...hat.com>
To: rostedt@...dmis.org, fweisbec@...il.com, a.p.zijlstra@...llo.nl
Cc: linux-kernel@...r.kernel.org
Subject: [RFC 4/4] perf, ftrace: Add ftrace option for perf stat command
Adding ftrace option to specify the ftrace filter for last/current event.
The value format is same as for the set_ftrace_filter tracing file.
This could be used only for ftrace:function (TRACE_FN) tracepoint event
like:
# ./perf stat -e ftrace:function --filter "ip == sys_open" \
--ftrace "sys_open sys_read" sleep 1
Performance counter stats for 'sleep 1':
3 ftrace:function
1.001460132 seconds time elapsed
---
tools/perf/builtin-stat.c | 2 ++
tools/perf/util/evlist.c | 26 ++++++++++++++++++++++----
tools/perf/util/evlist.h | 2 ++
tools/perf/util/evsel.h | 1 +
tools/perf/util/parse-events.c | 37 +++++++++++++++++++++++++++++++++----
tools/perf/util/parse-events.h | 1 +
6 files changed, 61 insertions(+), 8 deletions(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 1d08c80..77a257d 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1035,6 +1035,8 @@ static const struct option options[] = {
parse_events),
OPT_CALLBACK(0, "filter", &evsel_list, "filter",
"event filter", parse_filter),
+ OPT_CALLBACK(0, "ftrace", &evsel_list, "ftrace",
+ "ftrace filter", parse_ftrace),
OPT_BOOLEAN('i', "no-inherit", &no_inherit,
"child tasks do not inherit counters"),
OPT_INTEGER('p', "pid", &target_pid,
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index b021ea9..7627266 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -427,25 +427,43 @@ void perf_evlist__delete_maps(struct perf_evlist *evlist)
evlist->threads = NULL;
}
+static int set_filter_fd(int fd, char *filter, char *ftrace)
+{
+ int err;
+
+ if (filter) {
+ err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
+ if (err)
+ return err;
+ }
+ if (ftrace) {
+ err = ioctl(fd, PERF_EVENT_IOC_SET_FTRACE, ftrace);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
int perf_evlist__set_filters(struct perf_evlist *evlist)
{
const struct thread_map *threads = evlist->threads;
const struct cpu_map *cpus = evlist->cpus;
struct perf_evsel *evsel;
char *filter;
+ char *ftrace;
int thread;
int cpu;
int err;
- int fd;
list_for_each_entry(evsel, &evlist->entries, node) {
filter = evsel->filter;
- if (!filter)
+ ftrace = evsel->ftrace;
+ if (!filter && !ftrace)
continue;
for (cpu = 0; cpu < cpus->nr; cpu++) {
for (thread = 0; thread < threads->nr; thread++) {
- fd = FD(evsel, cpu, thread);
- err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
+ err = set_filter_fd(FD(evsel, cpu, thread),
+ filter, ftrace);
if (err)
return err;
}
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index b2b8623..25ccdf8 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -9,6 +9,8 @@ struct pollfd;
struct thread_map;
struct cpu_map;
+#define PERF_EVENT_IOC_SET_FTRACE _IOW('$', 7, char *)
+
#define PERF_EVLIST__HLIST_BITS 8
#define PERF_EVLIST__HLIST_SIZE (1 << PERF_EVLIST__HLIST_BITS)
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index e9a3155..60d949c 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -48,6 +48,7 @@ struct perf_evsel {
struct list_head node;
struct perf_event_attr attr;
char *filter;
+ char *ftrace;
struct xyarray *fd;
struct xyarray *sample_id;
u64 *id;
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 41982c3..dc58b0e 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -863,8 +863,7 @@ int parse_events(const struct option *opt, const char *str, int unset __used)
return 0;
}
-int parse_filter(const struct option *opt, const char *str,
- int unset __used)
+static struct perf_evsel *get_last_evsel(const struct option *opt)
{
struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
struct perf_evsel *last = NULL;
@@ -874,10 +873,22 @@ int parse_filter(const struct option *opt, const char *str,
if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
fprintf(stderr,
- "-F option should follow a -e tracepoint option\n");
- return -1;
+ "filter/ftrace options should follow a -e tracepoint option\n");
+ return NULL;
}
+ return last;
+}
+
+int parse_filter(const struct option *opt, const char *str,
+ int unset __used)
+{
+ struct perf_evsel *last = NULL;
+
+ last = get_last_evsel(opt);
+ if (!last)
+ return -1;
+
last->filter = strdup(str);
if (last->filter == NULL) {
fprintf(stderr, "not enough memory to hold filter string\n");
@@ -887,6 +898,24 @@ int parse_filter(const struct option *opt, const char *str,
return 0;
}
+int parse_ftrace(const struct option *opt, const char *str,
+ int unset __used)
+{
+ struct perf_evsel *last = NULL;
+
+ last = get_last_evsel(opt);
+ if (!last)
+ return -1;
+
+ last->ftrace = strdup(str);
+ if (last->ftrace == NULL) {
+ fprintf(stderr, "not enough memory to hold ftrace string\n");
+ return -1;
+ }
+
+ return 0;
+}
+
static const char * const event_type_descriptors[] = {
"Hardware event",
"Software event",
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 746d3fc..9933649 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -26,6 +26,7 @@ extern const char *__event_name(int type, u64 config);
extern int parse_events(const struct option *opt, const char *str, int unset);
extern int parse_filter(const struct option *opt, const char *str, int unset);
+extern int parse_ftrace(const struct option *opt, const char *str, int unset);
#define EVENTS_HELP_MAX (128*1024)
--
1.7.1
--
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