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[lttng-tools.git] / src / common / defaults.h
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9bda164d 1/*
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2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9bda164d 4 *
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5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
9bda164d 8 *
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9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
d14d33bf 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
e848fc76 12 * more details.
9bda164d 13 *
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14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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17 */
18
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19#ifndef _DEFAULTS_H
20#define _DEFAULTS_H
e848fc76 21
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22/* Default unix group name for tracing. */
23#define DEFAULT_TRACING_GROUP "tracing"
24
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25/*
26 * This value is defined in the CTF specification (see
27 * git://git.efficios.com/ctf.git in the file
28 * common-trace-format-specification.txt.
29 */
30#define DEFAULT_METADATA_NAME "metadata"
31
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32/* Environment variable to set session daemon binary path. */
33#define DEFAULT_SESSIOND_PATH_ENV "LTTNG_SESSIOND_PATH"
34
35/* Default trace output directory name */
36#define DEFAULT_TRACE_DIR_NAME "lttng-traces"
37
f6a9efaa 38/* Default size of a hash table */
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39#define DEFAULT_HT_SIZE 4
40
41/* Default session daemon paths */
42#define DEFAULT_HOME_DIR "/tmp"
43#define DEFAULT_UST_SOCK_DIR DEFAULT_HOME_DIR "/ust-app-socks"
44#define DEFAULT_GLOBAL_APPS_PIPE DEFAULT_UST_SOCK_DIR "/global"
45#define DEFAULT_TRACE_OUTPUT DEFAULT_HOME_DIR "/lttng"
46
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47/* Default directory where the trace are written in per domain */
48#define DEFAULT_KERNEL_TRACE_DIR "/kernel"
49#define DEFAULT_UST_TRACE_DIR "/ust"
50
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51/* Subpath for per PID or UID sessions. */
52#define DEFAULT_UST_TRACE_PID_PATH "/pid"
53#define DEFAULT_UST_TRACE_UID_PATH "/uid/%d/%u-bit"
54
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55/*
56 * Default session name for the lttng command line. This default value will
57 * get the date and time appended (%Y%m%d-%H%M%S) to it.
58 */
07424f16 59#define DEFAULT_SESSION_NAME "auto"
a4b92340 60
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61/* Default consumer paths */
62#define DEFAULT_CONSUMERD_RUNDIR "%s"
63
64/* Kernel consumer path */
65#define DEFAULT_KCONSUMERD_PATH DEFAULT_CONSUMERD_RUNDIR "/kconsumerd"
66#define DEFAULT_KCONSUMERD_CMD_SOCK_PATH DEFAULT_KCONSUMERD_PATH "/command"
67#define DEFAULT_KCONSUMERD_ERR_SOCK_PATH DEFAULT_KCONSUMERD_PATH "/error"
68
69/* UST 64-bit consumer path */
70#define DEFAULT_USTCONSUMERD64_PATH DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd64"
71#define DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH DEFAULT_USTCONSUMERD64_PATH "/command"
72#define DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH DEFAULT_USTCONSUMERD64_PATH "/error"
73
74/* UST 32-bit consumer path */
75#define DEFAULT_USTCONSUMERD32_PATH DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd32"
76#define DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH DEFAULT_USTCONSUMERD32_PATH "/command"
77#define DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH DEFAULT_USTCONSUMERD32_PATH "/error"
78
990570ed 79/* Default lttng run directory */
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80#define DEFAULT_LTTNG_RUNDIR "/var/run/lttng"
81#define DEFAULT_LTTNG_HOME_RUNDIR "%s/.lttng"
35f90c40 82#define DEFAULT_LTTNG_SESSIOND_PIDFILE "lttng-sessiond.pid"
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83
84/* Default unix socket path */
60922cb0 85#define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/client-lttng-sessiond"
60922cb0 86#define DEFAULT_HOME_CLIENT_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/client-lttng-sessiond"
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87#define DEFAULT_GLOBAL_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/health.sock"
88#define DEFAULT_HOME_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/health.sock"
990570ed 89
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90#define DEFAULT_GLOBAL_APPS_UNIX_SOCK \
91 DEFAULT_LTTNG_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
92#define DEFAULT_HOME_APPS_UNIX_SOCK \
93 DEFAULT_LTTNG_HOME_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
94#define DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH \
95 "/" LTTNG_UST_WAIT_FILENAME
96#define DEFAULT_HOME_APPS_WAIT_SHM_PATH \
97 DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH "-%d"
98
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99/*
100 * Value taken from the hard limit allowed by the kernel when using setrlimit
101 * with RLIMIT_NOFILE on an Intel i7 CPU and Linux 3.0.3.
102 */
103#define DEFAULT_POLL_SIZE 65535
104
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105/*
106 * Format is %s_%d respectively channel name and CPU number. Eigth bytes
107 * are added here to add space for the CPU number. I guess 2^8 CPUs is more
108 * than enough. We might end up with quantum computing in a cell phone when
109 * reaching this limit.
110 */
111#define DEFAULT_STREAM_NAME_LEN LTTNG_SYMBOL_NAME_LEN + 8
112
f3ed775e 113/* Default channel attributes */
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114#define DEFAULT_CHANNEL_NAME "channel0"
115#define DEFAULT_CHANNEL_OVERWRITE 0 /* usec */
7d452e12 116/* DEFAULT_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
3817e7df 117#define DEFAULT_CHANNEL_SUBBUF_SIZE 4096 /* bytes */
7d452e12 118/* DEFAULT_CHANNEL_SUBBUF_NUM must always be a power of 2 */
9f778c9a 119#define DEFAULT_CHANNEL_SUBBUF_NUM 4
3817e7df 120#define DEFAULT_CHANNEL_SWITCH_TIMER 0 /* usec */
6bb9e85f 121#define DEFAULT_CHANNEL_READ_TIMER 200000 /* usec */
3817e7df 122#define DEFAULT_CHANNEL_OUTPUT LTTNG_EVENT_MMAP
b389abbe 123
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124#define DEFAULT_METADATA_SUBBUF_SIZE 4096
125#define DEFAULT_METADATA_SUBBUF_NUM 2
331744e3 126#define DEFAULT_METADATA_CACHE_SIZE 4096
e6ddca71 127
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128/* Kernel has different defaults */
129
130/* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
3817e7df 131#define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE 262144 /* bytes */
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132/*
133 * DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM must always be a power of 2.
134 * Update help manually if override.
135 */
136#define DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM DEFAULT_CHANNEL_SUBBUF_NUM
b389abbe 137/* See lttng-kernel.h enum lttng_kernel_output for channel output */
3817e7df 138#define DEFAULT_KERNEL_CHANNEL_OUTPUT LTTNG_EVENT_SPLICE
f3ed775e 139
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140#define DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER \
141 DEFAULT_CHANNEL_SWITCH_TIMER
142#define DEFAULT_KERNEL_CHANNEL_READ_TIMER 200000 /* usec */
143
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144/* User space defaults */
145
146/* Must be a power of 2 */
147#define DEFAULT_UST_CHANNEL_SUBBUF_SIZE 4096 /* bytes */
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148/* Must be a power of 2. Update help manuall if override. */
149#define DEFAULT_UST_CHANNEL_SUBBUF_NUM DEFAULT_CHANNEL_SUBBUF_NUM
28ca4a8b 150/* See lttng-ust.h enum lttng_ust_output */
d41f73b7 151#define DEFAULT_UST_CHANNEL_OUTPUT LTTNG_EVENT_MMAP
0b0dd29a 152
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153#define DEFAULT_UST_CHANNEL_SWITCH_TIMER \
154 DEFAULT_CHANNEL_SWITCH_TIMER
155#define DEFAULT_UST_CHANNEL_READ_TIMER 0 /* usec */
156
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157/*
158 * Default timeout value for the sem_timedwait() call. Blocking forever is not
159 * wanted so a timeout is used to control the data flow and not freeze the
160 * session daemon.
161 */
162#define DEFAULT_SEM_WAIT_TIMEOUT 30 /* in seconds */
163
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164/* Default network ports for trace streaming support */
165#define DEFAULT_NETWORK_CONTROL_PORT 5342
166#define DEFAULT_NETWORK_DATA_PORT 5343
167
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168/*
169 * If a thread stalls for this amount of time, it will be considered bogus (bad
170 * health).
171 */
172#define DEFAULT_HEALTH_CHECK_DELTA_S 20
173#define DEFAULT_HEALTH_CHECK_DELTA_NS 0
174
38ee087f 175/*
6d805429 176 * Wait period before retrying the lttng_data_pending command in the lttng
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177 * stop command of liblttng-ctl.
178 */
179#define DEFAULT_DATA_AVAILABILITY_WAIT_TIME 200000 /* usec */
180
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181/*
182 * Wait period before retrying the lttng_consumer_flushed_cache when
183 * the consumer receives metadata.
184 */
185#define DEFAULT_METADATA_AVAILABILITY_WAIT_TIME 200000 /* usec */
186
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187/*
188 * Default receiving and sending timeout for an application socket.
189 */
190#define DEFAULT_APP_SOCKET_RW_TIMEOUT 5 /* sec */
191#define DEFAULT_APP_SOCKET_TIMEOUT_ENV "LTTNG_APP_SOCKET_TIMEOUT"
192
ffe60014 193#define DEFAULT_UST_STREAM_FD_NUM 2 /* Number of fd per UST stream. */
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194
195extern size_t default_channel_subbuf_size;
196extern size_t default_metadata_subbuf_size;
197extern size_t default_ust_channel_subbuf_size;
198extern size_t default_kernel_channel_subbuf_size;
199
200
201/*
202 * Returns the default subbuf size.
203 *
204 * This function depends on a value that is set at constructor time, so it is
205 * unsafe to call it from another constructor.
206 */
207static inline
208size_t default_get_channel_subbuf_size(void)
209{
210 return default_channel_subbuf_size;
211}
212
213/*
214 * Returns the default metadata subbuf size.
215 *
216 * This function depends on a value that is set at constructor time, so it is
217 * unsafe to call it from another constructor.
218 */
219static inline
220size_t default_get_metadata_subbuf_size(void)
221{
222 return default_metadata_subbuf_size;
223}
224
225/*
226 * Returns the default subbuf size for the kernel domain.
227 *
228 * This function depends on a value that is set at constructor time, so it is
229 * unsafe to call it from another constructor.
230 */
231static inline
232size_t default_get_kernel_channel_subbuf_size(void)
233{
234 return default_kernel_channel_subbuf_size;
235}
236
237/*
238 * Returns the default subbuf size for the UST domain.
239 *
240 * This function depends on a value that is set at constructor time, so it is
241 * unsafe to call it from another constructor.
242 */
243static inline
244size_t default_get_ust_channel_subbuf_size(void)
245{
246 return default_ust_channel_subbuf_size;
247}
248
990570ed 249#endif /* _DEFAULTS_H */
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