[PATCH] perf tools: Add support to specify rXXX event withing pmu

From: Jiri Olsa
Date: Thu Apr 16 2020 - 18:14:22 EST


From: Jiri Olsa <jolsa@xxxxxxxxxx>

The current rXXXX event specification creates event under
PERF_TYPE_RAW pmu type. This change allows to use rXXXX
within pmu syntax, so it's type is used via following
syntax:

-e 'cpu/r3c/'
-e 'cpum_cf/r0/'

The XXXX number goes directly to perf_event_attr::config the
same way as in '-e rXXXX' event. The perf_event_attr::type is
filled with pmu type.

Requested-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/perf/Documentation/perf-list.txt | 5 +++++
tools/perf/tests/parse-events.c | 17 ++++++++++++++++-
tools/perf/util/parse-events.l | 1 +
tools/perf/util/parse-events.y | 9 +++++++++
4 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index cb23667531ab..376a50b3452d 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -115,6 +115,11 @@ raw encoding of 0x1A8 can be used:
perf stat -e r1a8 -a sleep 1
perf record -e r1a8 ...

+It's also possible to use pmu syntax:
+
+ perf record -e r1a8 -a sleep 1
+ perf record -e cpu/r1a8/ ...
+
You should refer to the processor specific documentation for getting these
details. Some of them are referenced in the SEE ALSO section below.

diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index 091c3aeccc27..902bd9d591a0 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -1356,6 +1356,16 @@ static int test__checkevent_complex_name(struct evlist *evlist)
return 0;
}

+static int test__checkevent_raw_pmu(struct evlist *evlist)
+{
+ struct evsel *evsel = evlist__first(evlist);
+
+ TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->core.nr_entries);
+ TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE == evsel->core.attr.type);
+ TEST_ASSERT_VAL("wrong config", 0x1a == evsel->core.attr.config);
+ return 0;
+}
+
static int test__sym_event_slash(struct evlist *evlist)
{
struct evsel *evsel = evlist__first(evlist);
@@ -1750,7 +1760,12 @@ static struct evlist_test test__events_pmu[] = {
.name = "cpu/name='COMPLEX_CYCLES_NAME:orig=cycles,desc=chip-clock-ticks',period=0x1,event=0x2/ukp",
.check = test__checkevent_complex_name,
.id = 3,
- }
+ },
+ {
+ .name = "software/r1a/",
+ .check = test__checkevent_raw_pmu,
+ .id = 4,
+ },
};

struct terms_test {
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index baa48f28d57d..c589fc42f058 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -286,6 +286,7 @@ no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); }
aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); }
aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); }
+r{num_raw_hex} { return raw(yyscanner); }
, { return ','; }
"/" { BEGIN(INITIAL); return '/'; }
{name_minus} { return str(yyscanner, PE_NAME); }
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 94f8bcd83582..e879eb257874 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -706,6 +706,15 @@ event_term
}

event_term:
+PE_RAW
+{
+ struct parse_events_term *term;
+
+ ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_CONFIG,
+ NULL, $1, false, &@1, NULL));
+ $$ = term;
+}
+|
PE_NAME '=' PE_NAME
{
struct parse_events_term *term;
--
2.25.2