tools/lib/perf/include/internal/evsel.h

   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 */