tools/perf/util/mmap.h

   1 #ifndef __PERF_MMAP_H
   2 #define __PERF_MMAP_H 1
   3
   4 #include <internal/mmap.h>
   5 #include <linux/compiler.h>
   6 #include <linux/refcount.h>
   7 #include <linux/types.h>
   8 #include <linux/ring_buffer.h>
   9 #include <stdbool.h>
  10 #include <pthread.h> // for cpu_set_t
  11 #ifdef HAVE_AIO_SUPPORT
  12 #include <aio.h>
  13 #endif
  14 #include "auxtrace.h"
  15 #include "event.h"
  16
  17 struct aiocb;
  18
  19 struct mmap_cpu_mask {
  20         unsigned long *bits;
  21         size_t nbits;
  22 };
  23
  24 #define MMAP_CPU_MASK_BYTES(m) \
  25         (BITS_TO_LONGS(((struct mmap_cpu_mask *)m)->nbits) * sizeof(unsigned long))
  26
  27 /**
  28  * struct mmap - perf's ring buffer mmap details
  29  *
  30  * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
  31  */
  32 struct mmap {
  33         struct perf_mmap        core;
  34         struct auxtrace_mmap auxtrace_mmap;
  35 #ifdef HAVE_AIO_SUPPORT
  36         struct {
  37                 void             **data;
  38                 struct aiocb     *cblocks;
  39                 struct aiocb     **aiocb;
  40                 int              nr_cblocks;
  41         } aio;
  42 #endif
  43         struct mmap_cpu_mask    affinity_mask;
  44         void            *data;
  45         int             comp_level;
  46 };
  47
  48 struct mmap_params {
  49         struct perf_mmap_param core;
  50         int nr_cblocks, affinity, flush, comp_level;
  51         struct auxtrace_mmap_params auxtrace_mp;
  52 };
  53
  54 int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
  55 void mmap__munmap(struct mmap *map);
  56
  57 union perf_event *perf_mmap__read_forward(struct mmap *map);
  58
  59 int perf_mmap__push(struct mmap *md, void *to,
  60                     int push(struct mmap *map, void *to, void *buf, size_t size));
  61
  62 size_t mmap__mmap_len(struct mmap *map);
  63
  64 void mmap_cpu_mask__scnprintf(struct mmap_cpu_mask *mask, const char *tag);
  65
  66 #endif /*__PERF_MMAP_H */