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perf cs-etm: Don't test full_auxtrace because it's always set 

There is no path in cs-etm where this isn't true so it doesn't need to
be tested. Also re-order the beginning of cs_etm_recording_options() so
that nothing is done until the early exit is passed.

Signed-off-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Denis Nikitin <denik@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230424134748.228137-4-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2023-04-24 14:47:43 +01:00 committed by Arnaldo Carvalho de Melo
parent 6593f019c2
commit 3963d84b1b
1 changed files with 24 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
tools/perf/arch/arm/util/cs-etm.c
View File

@ -319,13 +319,6 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
bool privileged = perf_event_paranoid_check(-1);
int err = 0;
ptr->evlist = evlist;
ptr->snapshot_mode = opts->auxtrace_snapshot_mode;
if (!record_opts__no_switch_events(opts) &&
perf_can_record_switch_events())
opts->record_switch_events = true;
evlist__for_each_entry(evlist, evsel) {
if (evsel->core.attr.type == cs_etm_pmu->type) {
if (cs_etm_evsel) {
@ -333,11 +326,7 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
CORESIGHT_ETM_PMU_NAME);
return -EINVAL;
}
evsel->core.attr.freq = 0;
evsel->core.attr.sample_period = 1;
evsel->needs_auxtrace_mmap = true;
cs_etm_evsel = evsel;
opts->full_auxtrace = true;
}
}
@ -345,6 +334,18 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
if (!cs_etm_evsel)
return 0;
ptr->evlist = evlist;
ptr->snapshot_mode = opts->auxtrace_snapshot_mode;
if (!record_opts__no_switch_events(opts) &&
perf_can_record_switch_events())
opts->record_switch_events = true;
cs_etm_evsel->core.attr.freq = 0;
cs_etm_evsel->core.attr.sample_period = 1;
cs_etm_evsel->needs_auxtrace_mmap = true;
opts->full_auxtrace = true;
ret = cs_etm_set_sink_attr(cs_etm_pmu, cs_etm_evsel);
if (ret)
return ret;
@ -414,8 +415,8 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
}
}
/* We are in full trace mode but '-m,xyz' wasn't specified */
if (opts->full_auxtrace && !opts->auxtrace_mmap_pages) {
/* Buffer sizes weren't specified with '-m,xyz' so give some defaults */
if (!opts->auxtrace_mmap_pages) {
if (privileged) {
opts->auxtrace_mmap_pages = MiB(4) / page_size;
} else {
@ -423,7 +424,6 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
if (opts->mmap_pages == UINT_MAX)
opts->mmap_pages = KiB(256) / page_size;
}
}
if (opts->auxtrace_snapshot_mode)
@ -454,23 +454,17 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
}
/* Add dummy event to keep tracking */
if (opts->full_auxtrace) {
struct evsel *tracking_evsel;
err = parse_event(evlist, "dummy:u");
if (err)
goto out;
evsel = evlist__last(evlist);
evlist__set_tracking_event(evlist, evsel);
evsel->core.attr.freq = 0;
evsel->core.attr.sample_period = 1;
err = parse_event(evlist, "dummy:u");
if (err)
goto out;
tracking_evsel = evlist__last(evlist);
evlist__set_tracking_event(evlist, tracking_evsel);
tracking_evsel->core.attr.freq = 0;
tracking_evsel->core.attr.sample_period = 1;
/* In per-cpu case, always need the time of mmap events etc */
if (!perf_cpu_map__empty(cpus))
evsel__set_sample_bit(tracking_evsel, TIME);
}
/* In per-cpu case, always need the time of mmap events etc */
if (!perf_cpu_map__empty(cpus))
evsel__set_sample_bit(evsel, TIME);
out:
return err;