1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LIBPERF_INTERNAL_EVSEL_H 3 #define __LIBPERF_INTERNAL_EVSEL_H 4 5 #include <linux/types.h> 6 #include <linux/perf_event.h> 7 #include <stdbool.h> 8 #include <sys/types.h> 9 10 struct perf_cpu_map; 11 struct perf_thread_map; 12 struct xyarray; 13 14 /* 15 * Per fd, to map back from PERF_SAMPLE_ID to evsel, only used when there are 16 * more than one entry in the evlist. 17 */ 18 struct perf_sample_id { 19 struct hlist_node node; 20 u64 id; 21 struct perf_evsel *evsel; 22 /* 23 * 'idx' will be used for AUX area sampling. A sample will have AUX area 24 * data that will be queued for decoding, where there are separate 25 * queues for each CPU (per-cpu tracing) or task (per-thread tracing). 26 * The sample ID can be used to lookup 'idx' which is effectively the 27 * queue number. 28 */ 29 int idx; 30 int cpu; 31 pid_t tid; 32 33 /* Holds total ID period value for PERF_SAMPLE_READ processing. */ 34 u64 period; 35 }; 36 37 struct perf_evsel { 38 struct list_head node; 39 struct perf_event_attr attr; 40 struct perf_cpu_map *cpus; 41 struct perf_cpu_map *own_cpus; 42 struct perf_thread_map *threads; 43 struct xyarray *fd; 44 struct xyarray *sample_id; 45 u64 *id; 46 u32 ids; 47 48 /* parse modifier helper */ 49 int nr_members; 50 bool system_wide; 51 }; 52 53 void perf_evsel__init(struct perf_evsel *evsel, struct perf_event_attr *attr); 54 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads); 55 void perf_evsel__close_fd(struct perf_evsel *evsel); 56 void perf_evsel__free_fd(struct perf_evsel *evsel); 57 int perf_evsel__read_size(struct perf_evsel *evsel); 58 int perf_evsel__apply_filter(struct perf_evsel *evsel, const char *filter); 59 60 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads); 61 void perf_evsel__free_id(struct perf_evsel *evsel); 62 63 #endif /* __LIBPERF_INTERNAL_EVSEL_H */ 64