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author | 2022-08-12 16:09:45 -0700 | |
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committer | 2022-08-13 15:01:31 -0300 | |
commit | 660842e468dcefb5d1d4fb40ed3abe4d1388dff7 (patch) | |
tree | 1f440d77fef497cee8c1a71bc8cf3d4f1bec69af /tools/perf/util/s390-sample-raw.c | |
parent | perf pmu-events: Move test events/metrics to JSON (diff) | |
download | linux-660842e468dcefb5d1d4fb40ed3abe4d1388dff7.tar.gz linux-660842e468dcefb5d1d4fb40ed3abe4d1388dff7.tar.bz2 linux-660842e468dcefb5d1d4fb40ed3abe4d1388dff7.zip |
perf pmu-events: Don't assume pmu_event is an array
The current code assumes that a struct pmu_event can be iterated over
forward until a NULL pmu_event is encountered.
This makes it difficult to refactor pmu_event.
Add a loop function taking a callback function that's passed the struct
pmu_event.
This way the pmu_event is only needed for one element and not an entire
array.
Switch existing code iterating over the pmu_event arrays to use the new
loop function pmu_events_table_for_each_event.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20220812230949.683239-11-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/s390-sample-raw.c')
-rw-r--r-- | tools/perf/util/s390-sample-raw.c | 42 |
1 files changed, 30 insertions, 12 deletions
diff --git a/tools/perf/util/s390-sample-raw.c b/tools/perf/util/s390-sample-raw.c index dddd2be59827..235319d45d02 100644 --- a/tools/perf/util/s390-sample-raw.c +++ b/tools/perf/util/s390-sample-raw.c @@ -129,6 +129,28 @@ static int get_counterset_start(int setnr) } } +struct get_counter_name_data { + int wanted; + const char *result; +}; + +static int get_counter_name_callback(const struct pmu_event *evp, + const struct pmu_event *table __maybe_unused, + void *vdata) +{ + struct get_counter_name_data *data = vdata; + int rc, event_nr; + + if (evp->name == NULL || evp->event == NULL) + return 0; + rc = sscanf(evp->event, "event=%x", &event_nr); + if (rc == 1 && event_nr == data->wanted) { + data->result = evp->name; + return 1; /* Terminate the search. */ + } + return 0; +} + /* Scan the PMU table and extract the logical name of a counter from the * PMU events table. Input is the counter set and counter number with in the * set. Construct the event number and use this as key. If they match return @@ -137,20 +159,16 @@ static int get_counterset_start(int setnr) */ static const char *get_counter_name(int set, int nr, const struct pmu_event *table) { - int rc, event_nr, wanted = get_counterset_start(set) + nr; + struct get_counter_name_data data = { + .wanted = get_counterset_start(set) + nr, + .result = NULL, + }; - if (table) { - const struct pmu_event *evp = table; + if (!table) + return NULL; - for (; evp->name || evp->event || evp->desc; ++evp) { - if (evp->name == NULL || evp->event == NULL) - continue; - rc = sscanf(evp->event, "event=%x", &event_nr); - if (rc == 1 && event_nr == wanted) - return evp->name; - } - } - return NULL; + pmu_events_table_for_each_event(table, get_counter_name_callback, &data); + return data.result; } static void s390_cpumcfdg_dump(struct perf_sample *sample) |