diff options
Diffstat (limited to 'tools/perf/util/evsel.c')
| -rw-r--r-- | tools/perf/util/evsel.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 29d7b97f66fbc..6d187059a3736 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -232,6 +232,7 @@ void perf_evsel__init(struct perf_evsel *evsel, evsel->leader = evsel; evsel->unit = ""; evsel->scale = 1.0; + evsel->max_events = ULONG_MAX; evsel->evlist = NULL; evsel->bpf_fd = -1; INIT_LIST_HEAD(&evsel->node); @@ -793,6 +794,9 @@ static void apply_config_terms(struct perf_evsel *evsel, case PERF_EVSEL__CONFIG_TERM_MAX_STACK: max_stack = term->val.max_stack; break; + case PERF_EVSEL__CONFIG_TERM_MAX_EVENTS: + evsel->max_events = term->val.max_events; + break; case PERF_EVSEL__CONFIG_TERM_INHERIT: /* * attr->inherit should has already been set by @@ -1203,16 +1207,27 @@ int perf_evsel__append_addr_filter(struct perf_evsel *evsel, const char *filter) int perf_evsel__enable(struct perf_evsel *evsel) { - return perf_evsel__run_ioctl(evsel, - PERF_EVENT_IOC_ENABLE, - 0); + int err = perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_ENABLE, 0); + + if (!err) + evsel->disabled = false; + + return err; } int perf_evsel__disable(struct perf_evsel *evsel) { - return perf_evsel__run_ioctl(evsel, - PERF_EVENT_IOC_DISABLE, - 0); + int err = perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_DISABLE, 0); + /* + * We mark it disabled here so that tools that disable a event can + * ignore events after they disable it. I.e. the ring buffer may have + * already a few more events queued up before the kernel got the stop + * request. + */ + if (!err) + evsel->disabled = true; + + return err; } int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads) |