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perf tools: Add support to new style format of kernel PMU event

Add new rules for kernel PMU event.

Currently, the patch only want to handle the PMU event name as "a-b" and
"a".

event_pmu:
PE_KERNEL_PMU_EVENT sep_dc
|
PE_PMU_EVENT_PRE '-' PE_PMU_EVENT_SUF sep_dc

PE_KERNEL_PMU_EVENT token is for
cycles-ct/cycles-t/mem-loads/mem-stores.

The prefix cycles is mixed up with cpu-cycles.  loads and stores are
mixed up with cache event So they have to be hardcode in lex.

PE_PMU_EVENT_PRE and PE_PMU_EVENT_SUF tokens are for other PMU events.

The lex looks generic identifier up in the table and return the matched
token. If there is no match, generic PE_NAME token will be return.

Using the rules, kernel PMU event could use new style format without //

so you can use:

  perf record -e mem-loads ...

instead of:

  perf record -e cpu/mem-loads/

Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1412694532-23391-4-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Kan Liang 10 yıl önce
ebeveyn
dcb4e1022b
işleme
ba32a4511c
2 değiştirilmiş dosya ile 69 ekleme ve 1 silme
Görünümü Böl Farklılık Durumunu Göster
  1. 29 1
      tools/perf/util/parse-events.l
  2. 40 0
      tools/perf/util/parse-events.y

+ 29 - 1
tools/perf/util/parse-events.l
Dosyayı Görüntüle 

@@ -51,6 +51,24 @@ static int str(yyscan_t scanner, int token)
 
 	return token;
 
 }
 
 
+static int pmu_str_check(yyscan_t scanner)
 
+{
 
+	YYSTYPE *yylval = parse_events_get_lval(scanner);
 
+	char *text = parse_events_get_text(scanner);
 
+
 
+	yylval->str = strdup(text);
 
+	switch (perf_pmu__parse_check(text)) {
 
+		case PMU_EVENT_SYMBOL_PREFIX:
 
+			return PE_PMU_EVENT_PRE;
 
+		case PMU_EVENT_SYMBOL_SUFFIX:
 
+			return PE_PMU_EVENT_SUF;
 
+		case PMU_EVENT_SYMBOL:
 
+			return PE_KERNEL_PMU_EVENT;
 
+		default:
 
+			return PE_NAME;
 
+	}
 
+}
 
+
 
 static int sym(yyscan_t scanner, int type, int config)
 
 {
 
 	YYSTYPE *yylval = parse_events_get_lval(scanner);
 
@@ -178,6 +196,16 @@ alignment-faults				{ return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_AL
 
 emulation-faults				{ return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
 
 dummy						{ return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
 
 
+	/*
 
+	 * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately.
 
+	 * Because the prefix cycles is mixed up with cpu-cycles.
 
+	 * loads and stores are mixed up with cache event
 
+	 */
 
+cycles-ct					{ return str(yyscanner, PE_KERNEL_PMU_EVENT); }
 
+cycles-t					{ return str(yyscanner, PE_KERNEL_PMU_EVENT); }
 
+mem-loads					{ return str(yyscanner, PE_KERNEL_PMU_EVENT); }
 
+mem-stores					{ return str(yyscanner, PE_KERNEL_PMU_EVENT); }
 
+
 
 L1-dcache|l1-d|l1d|L1-data		|
 
 L1-icache|l1-i|l1i|L1-instruction	|
 
 LLC|L2					|
 
@@ -199,7 +227,7 @@ r{num_raw_hex}		{ return raw(yyscanner); }
 
 {num_hex}		{ return value(yyscanner, 16); }
 
 
 {modifier_event}	{ return str(yyscanner, PE_MODIFIER_EVENT); }
 
-{name}			{ return str(yyscanner, PE_NAME); }
 
+{name}			{ return pmu_str_check(yyscanner); }
 
 "/"			{ BEGIN(config); return '/'; }
 
 -			{ return '-'; }
 
 ,			{ BEGIN(event); return ','; }

+ 40 - 0
tools/perf/util/parse-events.y
Dosyayı Görüntüle 

@@ -47,6 +47,7 @@ static inc_group_count(struct list_head *list,
 
 %token PE_NAME_CACHE_TYPE PE_NAME_CACHE_OP_RESULT
 
 %token PE_PREFIX_MEM PE_PREFIX_RAW PE_PREFIX_GROUP
 
 %token PE_ERROR
 
+%token PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT
 
 %type <num> PE_VALUE
 
 %type <num> PE_VALUE_SYM_HW
 
 %type <num> PE_VALUE_SYM_SW
 
@@ -58,6 +59,7 @@ static inc_group_count(struct list_head *list,
 
 %type <str> PE_MODIFIER_EVENT
 
 %type <str> PE_MODIFIER_BP
 
 %type <str> PE_EVENT_NAME
 
+%type <str> PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT
 
 %type <num> value_sym
 
 %type <head> event_config
 
 %type <term> event_term
 
@@ -220,6 +222,44 @@ PE_NAME '/' '/'
 
 	ABORT_ON(parse_events_add_pmu(list, &data->idx, $1, NULL));
 
 	$$ = list;
 
 }
 
+|
 
+PE_KERNEL_PMU_EVENT sep_dc
 
+{
 
+	struct parse_events_evlist *data = _data;
 
+	struct list_head *head;
 
+	struct parse_events_term *term;
 
+	struct list_head *list;
 
+
 
+	ALLOC_LIST(head);
 
+	ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
 
+					$1, 1));
 
+	list_add_tail(&term->list, head);
 
+
 
+	ALLOC_LIST(list);
 
+	ABORT_ON(parse_events_add_pmu(list, &data->idx, "cpu", head));
 
+	parse_events__free_terms(head);
 
+	$$ = list;
 
+}
 
+|
 
+PE_PMU_EVENT_PRE '-' PE_PMU_EVENT_SUF sep_dc
 
+{
 
+	struct parse_events_evlist *data = _data;
 
+	struct list_head *head;
 
+	struct parse_events_term *term;
 
+	struct list_head *list;
 
+	char pmu_name[128];
 
+	snprintf(&pmu_name, 128, "%s-%s", $1, $3);
 
+
 
+	ALLOC_LIST(head);
 
+	ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
 
+					&pmu_name, 1));
 
+	list_add_tail(&term->list, head);
 
+
 
+	ALLOC_LIST(list);
 
+	ABORT_ON(parse_events_add_pmu(list, &data->idx, "cpu", head));
 
+	parse_events__free_terms(head);
 
+	$$ = list;
 
+}
 
 
 value_sym:
 
 PE_VALUE_SYM_HW