[lttv.git] / usertrace-fast / ltt-usertrace-fast.h


/* LTTng user-space "fast" tracing header
 *
 * Copyright 2006 Mathieu Desnoyers
 *
 */

#ifndef _LTT_USERTRACE_FAST_H
#define _LTT_USERTRACE_FAST_H

#include <errno.h>
#include <asm/atomic.h>
#include <pthread.h>

#ifndef	LTT_BUF_SIZE_CPU
#define LTT_BUF_SIZE_CPU 1048576
#endif //LTT_BUF_SIZE_CPU

#ifndef	LTT_BUF_SIZE_FACILITIES
#define LTT_BUF_SIZE_FACILITIES 4096
#endif //LTT_BUF_SIZE_FACILITIES

struct ltt_buf {
	atomic_t	offset;
	atomic_t	reserve_count;
	atomic_t	commit_count;

	atomic_t	events_lost;
};

struct ltt_trace_info {
	int init;
	int filter;
#ifndef LTT_USE_THREADS
	pid_t daemon_id;
#else
	pthread_t daemon_id;
#endif //LTT_USE_THREADS
	atomic_t nesting;
	struct {
		struct ltt_buf facilities;
		struct ltt_buf cpu;
		char facilities_buf[LTT_BUF_SIZE_FACILITIES] __attribute__ ((aligned (8)));
		char cpu_buf[LTT_BUF_SIZE_CPU] __attribute__ ((aligned (8)));
	} channel;
};

extern __thread struct ltt_trace_info *thread_trace_info;

void ltt_thread_init(void);

void ltt_usertrace_fast_buffer_switch(void);

#endif //_LTT_USERTRACE_FAST_H
Commit	Line	Data
	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	#include <pthread.h>
	14
	15	#ifndef LTT_BUF_SIZE_CPU
	16	#define LTT_BUF_SIZE_CPU 1048576
	17	#endif //LTT_BUF_SIZE_CPU
	18
	19	#ifndef LTT_BUF_SIZE_FACILITIES
	20	#define LTT_BUF_SIZE_FACILITIES 4096
	21	#endif //LTT_BUF_SIZE_FACILITIES
	22
	23	struct ltt_buf {
	24	atomic_t offset;
	25	atomic_t reserve_count;
	26	atomic_t commit_count;
	27
	28	atomic_t events_lost;
	29	};
	30
	31	struct ltt_trace_info {
	32	int init;
	33	int filter;
	34	#ifndef LTT_USE_THREADS
	35	pid_t daemon_id;
	36	#else
	37	pthread_t daemon_id;
	38	#endif //LTT_USE_THREADS
	39	atomic_t nesting;
	40	struct {
	41	struct ltt_buf facilities;
	42	struct ltt_buf cpu;
	43	char facilities_buf[LTT_BUF_SIZE_FACILITIES] __attribute__ ((aligned (8)));
	44	char cpu_buf[LTT_BUF_SIZE_CPU] __attribute__ ((aligned (8)));
	45	} channel;
	46	};
	47
	48	extern __thread struct ltt_trace_info *thread_trace_info;
	49
	50	void ltt_thread_init(void);
	51
	52	void ltt_usertrace_fast_buffer_switch(void);
	53
	54	#endif //_LTT_USERTRACE_FAST_H