diff options
| author | Ian Rogers <irogers@google.com> | 2023-08-24 07:13:21 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-08-24 17:02:59 +0300 |
| commit | edb217ff14fb98c74373f65f8ac08b9bfe26e344 (patch) | |
| tree | beb414e122cc6de8c050d481dd68bd8ab79d5955 /tools/perf/arch | |
| parent | 3d5045492ab209163714c70aa48e4ab6275ecca4 (diff) | |
| download | linux-edb217ff14fb98c74373f65f8ac08b9bfe26e344.tar.xz | |
perf pmu: Parse sysfs events directly from a file
Rather than read a sysfs events file into a 256 byte char buffer, pass
the FILE* directly to the lex/yacc parser.
This avoids there being a maximum events file size.
While changing the API, constify some arguments to remove unnecessary
casts.
Allocating the read buffer decreases the performance of pmu-scan by
around 3%.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Gaosheng Cui <cuigaosheng1@huawei.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230824041330.266337-10-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/arch')
| -rw-r--r-- | tools/perf/arch/x86/util/intel-pt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c index 27944c15ac14..31807791589e 100644 --- a/tools/perf/arch/x86/util/intel-pt.c +++ b/tools/perf/arch/x86/util/intel-pt.c @@ -74,7 +74,7 @@ static int intel_pt_parse_terms_with_default(struct perf_pmu *pmu, INIT_LIST_HEAD(terms); - err = parse_events_terms(terms, str); + err = parse_events_terms(terms, str, /*input=*/ NULL); if (err) goto out_free; |