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