1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2003-2004 Xiangxiu Yang
3 * 2006 Mathieu Desnoyers
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License Version 2.1 as published by the Free Software Foundation.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
24 #include <sys/types.h>
27 #include <ltt/event.h>
30 #define max(a,b) ((a)>(b)?(a):(b))
34 #define min(a,b) ((a)<(b)?(a):(b))
39 #define LTT_MAGIC_NUMBER 0x00D6B7ED
40 #define LTT_REV_MAGIC_NUMBER 0xEDB7D600
42 #define NSEC_PER_USEC 1000
45 #define LTT_GET_BO(t) ((t)->reverse_bo)
47 #define LTT_HAS_FLOAT(t) ((t)->float_word_order ! =0)
48 #define LTT_GET_FLOAT_BO(t) \
49 (((t)->float_word_order == __BYTE_ORDER) ? 0 : 1)
51 #define SEQUENCE_AVG_ELEMENTS 1000
53 typedef guint8
uint8_t;
54 typedef guint16
uint16_t;
55 typedef guint32
uint32_t;
56 typedef guint64
uint64_t;
58 /* Subbuffer header */
59 struct ltt_subbuffer_header_2_0
{
60 uint64_t cycle_count_begin
; /* Cycle count at subbuffer start */
61 uint64_t cycle_count_end
; /* Cycle count at subbuffer end */
62 uint32_t magic_number
; /* Trace magic number.
63 * contains endianness information.
65 uint8_t major_version
;
66 uint8_t minor_version
;
67 uint8_t arch_size
; /* Architecture pointer size */
68 uint8_t alignment
; /* LTT data alignment */
69 uint64_t start_time_sec
; /* NTP-corrected start time */
70 uint64_t start_time_usec
;
71 uint64_t start_freq
; /*
72 * Frequency at trace start,
73 * used all along the trace.
75 uint32_t freq_scale
; /* Frequency scaling */
76 uint32_t lost_size
; /* Size unused at end of subbuffer */
77 uint32_t buf_size
; /* Size of this subbuffer */
80 typedef struct ltt_subbuffer_header_2_0 ltt_subbuffer_header_t
;
82 enum field_status
{ FIELD_UNKNOWN
, FIELD_VARIABLE
, FIELD_FIXED
};
84 typedef struct _LttBuffer
{
91 uint64_t freq
; /* Frequency in khz */
96 uint64_t freq
; /* Frequency in khz */
98 uint32_t lost_size
; /* Size unused at the end of the buffer */
101 uint64_t tsc
; /* Current timestamp counter */
102 uint64_t freq
; /* Frequency in khz */
103 guint32 cyc2ns_scale
;
106 struct LttTracefile
{
107 gboolean cpu_online
; //is the cpu online ?
108 GQuark long_name
; //tracefile complete filename
109 GQuark name
; //tracefile name
110 guint cpu_num
; //cpu number of the tracefile
111 guint tid
; //Usertrace tid, else 0
112 guint pgid
; //Usertrace pgid, else 0
113 guint64 creation
; //Usertrace creation, else 0
114 LttTrace
* trace
; //trace containing the tracefile
115 int fd
; //file descriptor
116 off_t file_size
; //file size
117 //unsigned block_size; //block_size
118 guint num_blocks
; //number of blocks in the file
119 gboolean reverse_bo
; //must we reverse byte order ?
120 gboolean float_word_order
; //what is the byte order of floats ?
121 size_t alignment
; //alignment of events in the tracefile.
122 // 0 or the architecture size in bytes.
124 size_t buffer_header_size
;
128 uint64_t tsc_mask_next_bit
; //next MSB after the mask
131 LttEvent event
; //Event currently accessible in the trace
134 LttBuffer buffer
; //current buffer
135 guint32 buf_size
; /* The size of blocks */
138 /* The characteristics of the system on which the trace was obtained
139 is described in a LttSystemDescription structure. */
141 struct LttSystemDescription
{
147 LttArchEndian endian
;
149 gchar
*kernel_release
;
150 gchar
*kernel_version
;
153 gchar
*hardware_platform
;
154 gchar
*operating_system
;
159 /* Calculate the offset needed to align the type.
160 * If alignment is 0, alignment is disactivated.
161 * else, the function returns the offset needed to
162 * align align_drift on the alignment value (should be
163 * the size of the architecture). */
164 static inline unsigned int ltt_align(size_t align_drift
,
168 size_t align_offset
= min(alignment
, size_of_type
);
173 g_assert(size_of_type
!= 0);
174 return ((align_offset
- align_drift
) & (align_offset
-1));
178 #endif /* LTT_PRIVATE_H */