diff options
Diffstat (limited to 'tools/perf/util/evsel.c')
| -rw-r--r-- | tools/perf/util/evsel.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index fe93f11cf3d1..56ebefd075f2 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1092,6 +1092,71 @@ static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param * } } +static void evsel__apply_ratio_to_prev(struct evsel *evsel, + struct perf_event_attr *attr, + struct record_opts *opts, + const char *buf) +{ + struct perf_event_attr *prev_attr = NULL; + struct evsel *evsel_prev = NULL; + u64 type = evsel->core.attr.sample_type; + u64 prev_type = 0; + double rtp; + + rtp = strtod(buf, NULL); + if (rtp <= 0) { + pr_err("Invalid ratio-to-prev value %lf\n", rtp); + return; + } + if (evsel == evsel__leader(evsel)) { + pr_err("Invalid use of ratio-to-prev term without preceding element in group\n"); + return; + } + if (!evsel->pmu->is_core) { + pr_err("Event using ratio-to-prev term must have a core PMU\n"); + return; + } + + evsel_prev = evsel__prev(evsel); + if (!evsel_prev) { + pr_err("Previous event does not exist.\n"); + return; + } + + if (evsel_prev->pmu->type != evsel->pmu->type) { + pr_err("Compared events (\"%s\", \"%s\") must have same PMU\n", + evsel->name, evsel_prev->name); + return; + } + + prev_attr = &evsel_prev->core.attr; + prev_type = evsel_prev->core.attr.sample_type; + + if (!(prev_type & PERF_SAMPLE_PERIOD)) { + attr->sample_period = prev_attr->sample_period * rtp; + attr->freq = 0; + evsel__reset_sample_bit(evsel, PERIOD); + } else if (!(type & PERF_SAMPLE_PERIOD)) { + prev_attr->sample_period = attr->sample_period / rtp; + prev_attr->freq = 0; + evsel__reset_sample_bit(evsel_prev, PERIOD); + } else { + if (opts->user_interval != ULLONG_MAX) { + prev_attr->sample_period = opts->user_interval; + attr->sample_period = prev_attr->sample_period * rtp; + prev_attr->freq = 0; + attr->freq = 0; + evsel__reset_sample_bit(evsel_prev, PERIOD); + evsel__reset_sample_bit(evsel, PERIOD); + } else { + pr_err("Event period term or count (-c) must be set when using ratio-to-prev term.\n"); + return; + } + } + + arch_evsel__apply_ratio_to_prev(evsel, attr); +} + static void evsel__apply_config_terms(struct evsel *evsel, struct record_opts *opts, bool track) { @@ -1105,6 +1170,7 @@ static void evsel__apply_config_terms(struct evsel *evsel, u32 dump_size = 0; int max_stack = 0; const char *callgraph_buf = NULL; + const char *rtp_buf = NULL; list_for_each_entry(term, config_terms, list) { switch (term->type) { @@ -1175,6 +1241,9 @@ static void evsel__apply_config_terms(struct evsel *evsel, break; case EVSEL__CONFIG_TERM_CFG_CHG: break; + case EVSEL__CONFIG_TERM_RATIO_TO_PREV: + rtp_buf = term->val.str; + break; default: break; } @@ -1226,6 +1295,8 @@ static void evsel__apply_config_terms(struct evsel *evsel, evsel__config_callchain(evsel, opts, ¶m); } } + if (rtp_buf) + evsel__apply_ratio_to_prev(evsel, attr, opts, rtp_buf); } struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type) @@ -1250,6 +1321,11 @@ void __weak arch__post_evsel_config(struct evsel *evsel __maybe_unused, { } +void __weak arch_evsel__apply_ratio_to_prev(struct evsel *evsel __maybe_unused, + struct perf_event_attr *attr __maybe_unused) +{ +} + static void evsel__set_default_freq_period(struct record_opts *opts, struct perf_event_attr *attr) { |