Messages in this thread Patch in this message | | | From | kan.liang@linux ... | Subject | [PATCH 08/12] perf tools: Support PERF_SAMPLE_WEIGHT_EXT | Date | Tue, 19 Jan 2021 12:38:27 -0800 |
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From: Kan Liang <kan.liang@linux.intel.com>
The new sample type, PERF_SAMPLE_WEIGHT_EXT, is an extension of the PERF_SAMPLE_WEIGHT sample type. Enable the sample type if the sample by weight option is applied.
Add weight_ext in the struct perf_sample to record the value of the new sample type. For the old kernel which doesn't support the new sample type, clear the sample type.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com> --- tools/perf/util/event.h | 1 + tools/perf/util/evsel.c | 22 +++++++++++++++++++--- tools/perf/util/evsel.h | 1 + tools/perf/util/synthetic-events.c | 8 ++++++++ 4 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index ff403ea..0852c86 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -128,6 +128,7 @@ struct perf_sample { u64 stream_id; u64 period; u64 weight; + union perf_weight_ext weight_ext; u64 transaction; u64 insn_cnt; u64 cyc_cnt; diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 97acde2..bb05687 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1165,8 +1165,10 @@ void evsel__config(struct evsel *evsel, struct record_opts *opts, attr->branch_sample_type = opts->branch_stack; } - if (opts->sample_weight) + if (opts->sample_weight) { evsel__set_sample_bit(evsel, WEIGHT); + evsel__set_sample_bit(evsel, WEIGHT_EXT); + } attr->task = track; attr->mmap = track; @@ -1735,6 +1737,8 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, } fallback_missing_features: + if (perf_missing_features.weight_ext) + evsel__reset_sample_bit(evsel, WEIGHT_EXT); if (perf_missing_features.clockid_wrong) evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */ if (perf_missing_features.clockid) { @@ -1873,8 +1877,13 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, * Must probe features in the order they were added to the * perf_event_attr interface. */ - if (!perf_missing_features.data_page_size && - (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) { + if (!perf_missing_features.weight_ext && + (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_EXT)) { + perf_missing_features.weight_ext = true; + pr_debug2("switching off weight extension support\n"); + goto fallback_missing_features; + } else if (!perf_missing_features.data_page_size && + (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) { perf_missing_features.data_page_size = true; pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n"); goto out_close; @@ -2382,6 +2391,13 @@ int evsel__parse_sample(struct evsel *evsel, union perf_event *event, array = (void *)array + sz; } + data->weight_ext.val = 0; + if (type & PERF_SAMPLE_WEIGHT_EXT) { + OVERFLOW_CHECK_u64(array); + data->weight_ext.val = *array; + array++; + } + return 0; } diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index cd1d8dd..ec598a6 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -145,6 +145,7 @@ struct perf_missing_features { bool branch_hw_idx; bool cgroup; bool data_page_size; + bool weight_ext; }; extern struct perf_missing_features perf_missing_features; diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c index 2947e3f..69291a9 100644 --- a/tools/perf/util/synthetic-events.c +++ b/tools/perf/util/synthetic-events.c @@ -1417,6 +1417,9 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, result += sample->aux_sample.size; } + if (type & PERF_SAMPLE_WEIGHT_EXT) + result += sizeof(u64); + return result; } @@ -1603,6 +1606,11 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_fo array = (void *)array + sz; } + if (type & PERF_SAMPLE_WEIGHT_EXT) { + *array = sample->weight_ext.val; + array++; + } + return 0; } -- 2.7.4
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