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-rw-r--r--tools/perf/Documentation/perf-record.txt11
-rw-r--r--tools/perf/builtin-record.c3
-rw-r--r--tools/perf/util/parse-events.c83
-rw-r--r--tools/perf/util/parse-events.h1
4 files changed, 84 insertions, 14 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 5b47b2c88223..29e5307945bf 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -69,7 +69,16 @@ OPTIONS
"perf report" to view group events together.
--filter=<filter>::
- Event filter.
+ Event filter. This option should follow a event selector (-e) which
+ selects tracepoint event(s). Multiple '--filter' options are combined
+ using '&&'.
+
+--exclude-perf::
+ Don't record events issued by perf itself. This option should follow
+ a event selector (-e) which selects tracepoint event(s). It adds a
+ filter expression 'common_pid != $PERFPID' to filters. If other
+ '--filter' exists, the new filter expression will be combined with
+ them by '&&'.
-a::
--all-cpus::
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 283fe96bdfc1..1932e27c00d8 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -992,6 +992,9 @@ struct option __record_options[] = {
parse_events_option),
OPT_CALLBACK(0, "filter", &record.evlist, "filter",
"event filter", parse_filter),
+ OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist,
+ NULL, "don't record events from perf itself",
+ exclude_perf),
OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
"record events on existing process id"),
OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index bbb7fbc2857e..4f807fc1b14a 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1167,27 +1167,24 @@ int parse_events_option(const struct option *opt, const char *str,
return ret;
}
-int parse_filter(const struct option *opt, const char *str,
- int unset __maybe_unused)
+static int
+foreach_evsel_in_last_glob(struct perf_evlist *evlist,
+ int (*func)(struct perf_evsel *evsel,
+ const void *arg),
+ const void *arg)
{
- struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
struct perf_evsel *last = NULL;
+ int err;
if (evlist->nr_entries > 0)
last = perf_evlist__last(evlist);
do {
- if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
- fprintf(stderr,
- "--filter option should follow a -e tracepoint option\n");
- return -1;
- }
-
- if (perf_evsel__set_filter(last, str) < 0) {
- fprintf(stderr,
- "not enough memory to hold filter string\n");
+ err = (*func)(last, arg);
+ if (err)
return -1;
- }
+ if (!last)
+ return 0;
if (last->node.prev == &evlist->entries)
return 0;
@@ -1197,6 +1194,66 @@ int parse_filter(const struct option *opt, const char *str,
return 0;
}
+static int set_filter(struct perf_evsel *evsel, const void *arg)
+{
+ const char *str = arg;
+
+ if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
+ fprintf(stderr,
+ "--filter option should follow a -e tracepoint option\n");
+ return -1;
+ }
+
+ if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
+ fprintf(stderr,
+ "not enough memory to hold filter string\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int parse_filter(const struct option *opt, const char *str,
+ int unset __maybe_unused)
+{
+ struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
+
+ return foreach_evsel_in_last_glob(evlist, set_filter,
+ (const void *)str);
+}
+
+static int add_exclude_perf_filter(struct perf_evsel *evsel,
+ const void *arg __maybe_unused)
+{
+ char new_filter[64];
+
+ if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
+ fprintf(stderr,
+ "--exclude-perf option should follow a -e tracepoint option\n");
+ return -1;
+ }
+
+ snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
+
+ if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
+ fprintf(stderr,
+ "not enough memory to hold filter string\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int exclude_perf(const struct option *opt,
+ const char *arg __maybe_unused,
+ int unset __maybe_unused)
+{
+ struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
+
+ return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
+ NULL);
+}
+
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 131f29b2f132..2063048a4354 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -34,6 +34,7 @@ extern int parse_events(struct perf_evlist *evlist, const char *str,
struct parse_events_error *error);
extern int parse_events_terms(struct list_head *terms, const char *str);
extern int parse_filter(const struct option *opt, const char *str, int unset);
+extern int exclude_perf(const struct option *opt, const char *arg, int unset);
#define EVENTS_HELP_MAX (128*1024)