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>

6 files changed, 59 insertions, 3 deletions

diff --git a/tools/perf/util/parse-events-test.c b/tools/perf/util/parse-events-test.c
index 2e8f435384a6..76b98e2a587d 100644
--- a/tools/perf/util/parse-events-test.c
+++ b/tools/perf/util/parse-events-test.c
@@ -409,6 +409,27 @@ static int test__checkevent_list(struct perf_evlist *evlist)
         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;
@@ -529,6 +550,10 @@ static struct test__event_st test__events_pmu[] = {
                 .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) / \
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 59324e7b3d8e..fac7d59309b8 100644
--- 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_head **list, int *idx,
                          (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_head **list, int *idx,
         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,
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 25ae3732f5b0..8cac57ab4ee6 100644
--- 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,
 };
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 331d28a08dcb..618a8e788399 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -105,6 +105,7 @@ misses|miss				{ return str(PE_NAME_CACHE_OP_RESULT); }
 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); }
 
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 126fad0a9936..362cc59332ae 100644
--- 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;
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 8ee219b7285b..a119a5371699 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -258,9 +258,9 @@ static int pmu_config_term(struct list_head *formats,
 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;