[PATCH V8 3/4] perf tools: Add support to new style format of kernel PMU event
From: kan . liang
Date: Tue Oct 07 2014 - 11:17:58 EST
From: Kan Liang <kan.liang@xxxxxxxxx>
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@xxxxxxxxx>
---
tools/perf/util/parse-events.l | 30 +++++++++++++++++++++++++++++-
tools/perf/util/parse-events.y | 40 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 69 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 3432995..906630b 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -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 ','; }
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 55fab6a..93c4c9f 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -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
--
1.8.3.2
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