From: Jiri Olsa <jolsa@redhat.com>
Subject: perf tools: Add hardcoded name term for pmu events
Date: Mon May 21 09:12:53 2012 +0200
Git-commit: 6b5fc39bdd781711d7da8b95ae0243df3b35c5bf
Patch-mainline: v3.5-rc1
References: bnc#806964
Signed-off-by: Tony Jones <tonyj@suse.de>

    perf tools: Add hardcoded name term for pmu events
    
    Adding a new hardcoded term 'name' allowing to specify a name for the
    pmu event. The term is defined along with standard pmu terms. If no
    'name' term is given, the event name follows following template:
    
        "raw 0x<perf_event_attr::config>"
    
    running:
        perf stat -e cpu/config=1,name=krava1/u ls
    
    will produce following output:
        ...
        Performance counter stats for 'ls':
                     0 krava1
        ...
    
    running:
        perf stat -e cpu/config=1/u ls
    
    will produce following output:
        ...
        Performance counter stats for 'ls':
                     0 raw 0x1
        ...
    
    Signed-off-by: Jiri Olsa <jolsa@redhat.com>
    Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Link: http://lkml.kernel.org/r/1337584373-2741-6-git-send-email-jolsa@redhat.com
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

---
 tools/perf/util/parse-events-test.c |   25 +++++++++++++++++++++++++
 tools/perf/util/parse-events.c      |   23 ++++++++++++++++++++++-
 tools/perf/util/parse-events.h      |    1 +
 tools/perf/util/parse-events.l      |    1 +
 tools/perf/util/parse-events.y      |    8 ++++++++
 tools/perf/util/pmu.c               |    4 ++--
 6 files changed, 59 insertions(+), 3 deletions(-)

--- a/tools/perf/util/parse-events-test.c
+++ b/tools/perf/util/parse-events-test.c
@@ -387,6 +387,27 @@ static int test__checkevent_list(struct
 	return 0;
 }
 
+static int test__checkevent_pmu_name(struct perf_evlist *evlist)
+{
+	struct perf_evsel *evsel;
+
+	/* cpu/config=1,name=krava1/u */
+	evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
+	TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->nr_entries);
+	TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
+	TEST_ASSERT_VAL("wrong config",  1 == evsel->attr.config);
+	TEST_ASSERT_VAL("wrong name", !strcmp(evsel->name, "krava"));
+
+	/* cpu/config=2/" */
+	evsel = list_entry(evsel->node.next, struct perf_evsel, node);
+	TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->nr_entries);
+	TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
+	TEST_ASSERT_VAL("wrong config",  2 == evsel->attr.config);
+	TEST_ASSERT_VAL("wrong name", !strcmp(evsel->name, "raw 0x2"));
+
+	return 0;
+}
+
 struct test__event_st {
 	const char *name;
 	__u32 type;
@@ -499,6 +520,10 @@ static struct test__event_st test__event
 		.name  = "cpu/config=10,config1,config2=3,period=1000/u",
 		.check = test__checkevent_pmu,
 	},
+	[1] = {
+		.name  = "cpu/config=1,name=krava/u,cpu/config=2/u",
+		.check = test__checkevent_pmu_name,
+	},
 };
 
 #define TEST__EVENTS_PMU_CNT (sizeof(test__events_pmu) / \
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -634,6 +634,9 @@ do {								\
 		 * attr->branch_sample_type = term->val.num;
 		 */
 		break;
+	case PARSE_EVENTS__TERM_TYPE_NAME:
+		CHECK_TYPE_VAL(STR);
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -672,6 +675,23 @@ int parse_events_add_numeric(struct list
 			 (char *) __event_name(type, config));
 }
 
+static int parse_events__is_name_term(struct parse_events__term *term)
+{
+	return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
+}
+
+static char *pmu_event_name(struct perf_event_attr *attr,
+			    struct list_head *head_terms)
+{
+	struct parse_events__term *term;
+
+	list_for_each_entry(term, head_terms, list)
+		if (parse_events__is_name_term(term))
+			return term->val.str;
+
+	return (char *) __event_name(PERF_TYPE_RAW, attr->config);
+}
+
 int parse_events_add_pmu(struct list_head **list, int *idx,
 			 char *name, struct list_head *head_config)
 {
@@ -693,7 +713,8 @@ int parse_events_add_pmu(struct list_hea
 	if (perf_pmu__config(pmu, &attr, head_config))
 		return -EINVAL;
 
-	return add_event(list, idx, &attr, (char *) "pmu");
+	return add_event(list, idx, &attr,
+			 pmu_event_name(&attr, head_config));
 }
 
 void parse_events_update_lists(struct list_head *list_event,
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -47,6 +47,7 @@ enum {
 	PARSE_EVENTS__TERM_TYPE_CONFIG,
 	PARSE_EVENTS__TERM_TYPE_CONFIG1,
 	PARSE_EVENTS__TERM_TYPE_CONFIG2,
+	PARSE_EVENTS__TERM_TYPE_NAME,
 	PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD,
 	PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE,
 };
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -105,6 +105,7 @@ misses|miss				{ return str(PE_NAME_CACH
 config			{ return term(PARSE_EVENTS__TERM_TYPE_CONFIG); }
 config1			{ return term(PARSE_EVENTS__TERM_TYPE_CONFIG1); }
 config2			{ return term(PARSE_EVENTS__TERM_TYPE_CONFIG2); }
+name			{ return term(PARSE_EVENTS__TERM_TYPE_NAME); }
 period			{ return term(PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
 branch_type		{ return term(PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
 
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -237,6 +237,14 @@ PE_NAME
 	$$ = term;
 }
 |
+PE_TERM '=' PE_NAME
+{
+	struct parse_events__term *term;
+
+	ABORT_ON(parse_events__term_str(&term, $1, NULL, $3));
+	$$ = term;
+}
+|
 PE_TERM '=' PE_VALUE
 {
 	struct parse_events__term *term;
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -258,9 +258,9 @@ static int pmu_config_term(struct list_h
 static int pmu_config(struct list_head *formats, struct perf_event_attr *attr,
 		      struct list_head *head_terms)
 {
-	struct parse_events__term *term, *h;
+	struct parse_events__term *term;
 
-	list_for_each_entry_safe(term, h, head_terms, list)
+	list_for_each_entry(term, head_terms, list)
 		if (pmu_config_term(formats, attr, term))
 			return -EINVAL;
 
