perf tools: Add support to parse event group syntax
Adding scanner/parser bits to parse event groups.
The grammar for group is:
groups: groups ',' group | group
group: group_name '{' events '}' group_mod
group_name: name | empty
group_mod: ':' group_mods | empty
group_mods: event_mod
It's possible to use standard event modifier as a modifier
for group. It'll be used as an update to existing event
modifiers.
It's necessary to use quoting ("'\) when specifying group on
command line, since {} characters are interpreted by most of
the shells.
It is now possible to specify groups in event syntax like:
'{cycles,faults}'
- anonymous group
'group1{cycles,faults}
- group with name 'group1'
'{cycles,faults}:k
- anonymous group with event modifier 'k'
'{cpu-clock,task-clock},{minor-faults,major-faults}'
- two anonymous groups
The grouping functionality itself is coming shortly.
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ulrich Drepper <drepper@gmail.com>
Link: http://lkml.kernel.org/n/tip-p4j8bnvo879uokum4k4zk5q6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 3ec4bfc..57d5809 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -611,19 +611,29 @@
pmu_event_name(head_config));
}
+int parse_events__modifier_group(struct list_head *list __used,
+ char *event_mod __used)
+{
+ return 0;
+}
+
+void parse_events__group(char *name __used, struct list_head *list __used)
+{
+}
+
void parse_events_update_lists(struct list_head *list_event,
struct list_head *list_all)
{
/*
* Called for single event definition. Update the
- * 'all event' list, and reinit the 'signle event'
+ * 'all event' list, and reinit the 'single event'
* list, for next event definition.
*/
list_splice_tail(list_event, list_all);
free(list_event);
}
-int parse_events_modifier(struct list_head *list, char *str)
+int parse_events__modifier_event(struct list_head *list, char *str)
{
struct perf_evsel *evsel;
int exclude = 0, exclude_GH = 0;