static enum bpf_perf_event_ret print_bpf_output(void *event, void *priv) { struct event_ring_info *ring = priv; struct perf_event_sample *e = event; struct { struct perf_event_header header; __u64 id; __u64 lost; } *lost = event; if (json_output) { jsonw_start_object(json_wtr); jsonw_name(json_wtr, "type"); jsonw_uint(json_wtr, e->header.type); jsonw_name(json_wtr, "cpu"); jsonw_uint(json_wtr, ring->cpu); jsonw_name(json_wtr, "index"); jsonw_uint(json_wtr, ring->key); if (e->header.type == PERF_RECORD_SAMPLE) { jsonw_name(json_wtr, "timestamp"); jsonw_uint(json_wtr, e->time); jsonw_name(json_wtr, "data"); print_data_json(e->data, e->size); } else if (e->header.type == PERF_RECORD_LOST) { jsonw_name(json_wtr, "lost"); jsonw_start_object(json_wtr); jsonw_name(json_wtr, "id"); jsonw_uint(json_wtr, lost->id); jsonw_name(json_wtr, "count"); jsonw_uint(json_wtr, lost->lost); jsonw_end_object(json_wtr); } jsonw_end_object(json_wtr); } else { if (e->header.type == PERF_RECORD_SAMPLE) { printf("== @%lld.%09lld CPU: %d index: %d =====\n", e->time / 1000000000ULL, e->time % 1000000000ULL, ring->cpu, ring->key); fprint_hex(stdout, e->data, e->size, " "); printf("\n"); } else if (e->header.type == PERF_RECORD_LOST) { printf("lost %lld events\n", lost->lost); } else { printf("unknown event type=%d size=%d\n", e->header.type, e->header.size); } } return LIBBPF_PERF_EVENT_CONT; }
void jsonw_uint_field(json_writer_t *self, const char *prop, unsigned int num) { jsonw_name(self, prop); jsonw_uint(self, num); }