[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

#ifndef LTT_USERTRACE_ROOT
#define LTT_USERTRACE_ROOT "/tmp/ltt-usertrace"
#endif //LTT_USERTRACE_ROOT

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
b09f3215	1
04180f7f	2	/* LTTng user-space "fast" tracing header
b09f3215	3	*
	4	* Copyright 2006 Mathieu Desnoyers
	5	*
	6	*/
	7
04180f7f	8	#ifndef _LTT_USERTRACE_FAST_H
04180f7f	9	#define _LTT_USERTRACE_FAST_H
b09f3215	10
b09f3215	11	#include <errno.h>
b09f3215	12	#include <asm/atomic.h>
700d350d	13	#include <pthread.h>
b09f3215	14
51bf1553	15	#ifndef LTT_BUF_SIZE_CPU
	16	#define LTT_BUF_SIZE_CPU 1048576
	17	#endif //LTT_BUF_SIZE_CPU
b09f3215	18
51bf1553	19	#ifndef LTT_BUF_SIZE_FACILITIES
	20	#define LTT_BUF_SIZE_FACILITIES 4096
	21	#endif //LTT_BUF_SIZE_FACILITIES
b09f3215	22
77b31f39	23	#ifndef LTT_USERTRACE_ROOT
	24	#define LTT_USERTRACE_ROOT "/tmp/ltt-usertrace"
	25	#endif //LTT_USERTRACE_ROOT
	26
b09f3215	27	struct ltt_buf {
b09f3215	28	atomic_t offset;
	29	atomic_t reserve_count;
	30	atomic_t commit_count;
	31
	32	atomic_t events_lost;
	33	};
	34
700d350d	35	struct ltt_trace_info {
1c48e587	36	int init;
b09f3215	37	int filter;
700d350d	38	#ifndef LTT_USE_THREADS
	39	pid_t daemon_id;
	40	#else
	41	pthread_t daemon_id;
	42	#endif //LTT_USE_THREADS
b09f3215	43	atomic_t nesting;
	44	struct {
	45	struct ltt_buf facilities;
	46	struct ltt_buf cpu;
700d350d	47	char facilities_buf[LTT_BUF_SIZE_FACILITIES] __attribute__ ((aligned (8)));
51bf1553	48	char cpu_buf[LTT_BUF_SIZE_CPU] __attribute__ ((aligned (8)));
b09f3215	49	} channel;
	50	};
	51
700d350d	52	extern __thread struct ltt_trace_info *thread_trace_info;
b09f3215	53
51bf1553	54	void ltt_thread_init(void);
b09f3215	55
700d350d	56	void ltt_usertrace_fast_buffer_switch(void);
700d350d	57
04180f7f	58	#endif //_LTT_USERTRACE_FAST_H