usertrace-fast/ltt-usertrace-fast.h

   1
   2 /* LTTng user-space "fast" tracing header
   3  *
   4  * Copyright 2006 Mathieu Desnoyers
   5  *
   6  */
   7
   8 #ifndef _LTT_USERTRACE_FAST_H
   9 #define _LTT_USERTRACE_FAST_H
  10
  11 #include <errno.h>
  12 #include <asm/atomic.h>
  13
  14 #ifndef LTT_BUF_SIZE_CPU
  15 #define LTT_BUF_SIZE_CPU 1048576
  16 #endif //LTT_BUF_SIZE_CPU
  17
  18 #ifndef LTT_BUF_SIZE_FACILITIES
  19 #define LTT_BUF_SIZE_FACILITIES 4096
  20 #endif //LTT_BUF_SIZE_FACILITIES
  21
  22 struct ltt_buf {
  23         atomic_t        offset;
  24         atomic_t        reserve_count;
  25         atomic_t        commit_count;
  26
  27         atomic_t        events_lost;
  28 };
  29
  30 struct lttng_trace_info {
  31         struct _pthread_cleanup_buffer cleanup;
  32         int init;
  33         int filter;
  34         atomic_t nesting;
  35         struct {
  36                 struct ltt_buf facilities;
  37                 char facilities_buf[LTT_BUF_SIZE_FACILITIES] __attribute__ ((aligned (8)));
  38                 struct ltt_buf cpu;
  39                 char cpu_buf[LTT_BUF_SIZE_CPU] __attribute__ ((aligned (8)));
  40         } channel;
  41 };
  42
  43 extern __thread struct lttng_trace_info lttng_trace_info;
  44
  45 void ltt_thread_init(void);
  46
  47 #endif //_LTT_USERTRACE_FAST_H