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perf tools: Allow r0x<HEX> event syntax

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Add support to specify raw event with 'r0<HEX>' syntax within pmu term
syntax like:

  -e cpu/r0xdead/

It will be used to specify raw events in cases where they conflict with
real pmu terms, like 'read', which is valid raw event syntax, but also a
possible pmu term name as reported by Jin Yao.

Reported-by: Jin Yao <yao.jin@linux.intel.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: http://lore.kernel.org/lkml/20200725121959.1181869-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2020-07-25 14:19:58 +02:00 committed by Arnaldo Carvalho de Melo
parent 3e43d79da1
commit c33cdf5411
3 changed files with 7 additions and 0 deletions
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1
tools/perf/Documentation/perf-list.txt
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@ -119,6 +119,7 @@ It's also possible to use pmu syntax:
perf record -e r1a8 -a sleep 1 perf record -e r1a8 -a sleep 1
perf record -e cpu/r1a8/ ... perf record -e cpu/r1a8/ ...
perf record -e cpu/r0x1a8/ ...
You should refer to the processor specific documentation for getting these You should refer to the processor specific documentation for getting these
details. Some of them are referenced in the SEE ALSO section below. details. Some of them are referenced in the SEE ALSO section below.

5
tools/perf/tests/parse-events.c
View File

@ -1766,6 +1766,11 @@ static struct evlist_test test__events_pmu[] = {
.check = test__checkevent_raw_pmu, .check = test__checkevent_raw_pmu,
.id = 4, .id = 4,
}, },
{
.name = "software/r0x1a/",
.check = test__checkevent_raw_pmu,
.id = 4,
},
}; };
struct terms_test { struct terms_test {

1
tools/perf/util/parse-events.l
View File

@ -293,6 +293,7 @@ percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); }
aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); } aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); }
aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); } aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); }
r{num_raw_hex} { return raw(yyscanner); } r{num_raw_hex} { return raw(yyscanner); }
r0x{num_raw_hex} { return raw(yyscanner); }
, { return ','; } , { return ','; }
"/" { BEGIN(INITIAL); return '/'; } "/" { BEGIN(INITIAL); return '/'; }
{name_minus} { return str(yyscanner, PE_NAME); } {name_minus} { return str(yyscanner, PE_NAME); }