src/common/defaults.h

   1 /*
   2  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
   3  *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *
   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.
   8  *
   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
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  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.
  17  */
  18
  19 #ifndef _DEFAULTS_H
  20 #define _DEFAULTS_H
  21
  22 /* Default unix group name for tracing. */
  23 #define DEFAULT_TRACING_GROUP                   "tracing"
  24
  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
  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
  38 /* Default size of a hash table */
  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
  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
  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
  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  */
  59 #define DEFAULT_SESSION_NAME                    "auto"
  60
  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
  79
  80 /* Default lttng run directory */
  81 #define DEFAULT_LTTNG_RUNDIR                    "/var/run/lttng"
  82 #define DEFAULT_LTTNG_HOME_RUNDIR               "%s/.lttng"
  83 #define DEFAULT_LTTNG_SESSIOND_PIDFILE          "lttng-sessiond.pid"
  84
  85 /* Default unix socket path */
  86 #define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK         DEFAULT_LTTNG_RUNDIR "/client-lttng-sessiond"
  87 #define DEFAULT_HOME_CLIENT_UNIX_SOCK           DEFAULT_LTTNG_HOME_RUNDIR "/client-lttng-sessiond"
  88 #define DEFAULT_GLOBAL_HEALTH_UNIX_SOCK         DEFAULT_LTTNG_RUNDIR "/health.sock"
  89 #define DEFAULT_HOME_HEALTH_UNIX_SOCK           DEFAULT_LTTNG_HOME_RUNDIR "/health.sock"
  90
  91 #define DEFAULT_GLOBAL_APPS_UNIX_SOCK \
  92         DEFAULT_LTTNG_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
  93 #define DEFAULT_HOME_APPS_UNIX_SOCK \
  94         DEFAULT_LTTNG_HOME_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
  95 #define DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH \
  96         "/" LTTNG_UST_WAIT_FILENAME
  97 #define DEFAULT_HOME_APPS_WAIT_SHM_PATH \
  98         DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH "-%d"
  99
 100 /*
 101  * Value taken from the hard limit allowed by the kernel when using setrlimit
 102  * with RLIMIT_NOFILE on an Intel i7 CPU and Linux 3.0.3.
 103  */
 104 #define DEFAULT_POLL_SIZE 65535
 105
 106 /*
 107  * Format is %s_%d respectively channel name and CPU number. Eigth bytes
 108  * are added here to add space for the CPU number. I guess 2^8 CPUs is more
 109  * than enough. We might end up with quantum computing in a cell phone when
 110  * reaching this limit.
 111  */
 112 #define DEFAULT_STREAM_NAME_LEN        LTTNG_SYMBOL_NAME_LEN + 8
 113
 114 /* Default channel attributes */
 115 #define DEFAULT_CHANNEL_NAME            "channel0"
 116 #define DEFAULT_CHANNEL_OVERWRITE       0       /* usec */
 117 /* DEFAULT_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
 118 #define DEFAULT_CHANNEL_SUBBUF_SIZE     4096    /* bytes */
 119 /* DEFAULT_CHANNEL_SUBBUF_NUM must always be a power of 2 */
 120 #define DEFAULT_CHANNEL_SUBBUF_NUM      4
 121 #define DEFAULT_CHANNEL_SWITCH_TIMER    0       /* usec */
 122 #define DEFAULT_CHANNEL_READ_TIMER      200000  /* usec */
 123 #define DEFAULT_CHANNEL_OUTPUT          LTTNG_EVENT_MMAP
 124
 125 #define DEFAULT_METADATA_SUBBUF_SIZE    4096
 126 #define DEFAULT_METADATA_SUBBUF_NUM     2
 127
 128 /* Kernel has different defaults */
 129
 130 /* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
 131 #define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE  262144    /* bytes */
 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
 137 /* See lttng-kernel.h enum lttng_kernel_output for channel output */
 138 #define DEFAULT_KERNEL_CHANNEL_OUTPUT       LTTNG_EVENT_SPLICE
 139
 140 #define DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER     \
 141                 DEFAULT_CHANNEL_SWITCH_TIMER
 142 #define DEFAULT_KERNEL_CHANNEL_READ_TIMER      200000  /* usec */
 143
 144 /* User space defaults */
 145
 146 /* Must be a power of 2 */
 147 #define DEFAULT_UST_CHANNEL_SUBBUF_SIZE     4096    /* bytes */
 148 /* Must be a power of 2. Update help manuall if override. */
 149 #define DEFAULT_UST_CHANNEL_SUBBUF_NUM      DEFAULT_CHANNEL_SUBBUF_NUM
 150 /* See lttng-ust.h enum lttng_ust_output */
 151 #define DEFAULT_UST_CHANNEL_OUTPUT          LTTNG_EVENT_MMAP
 152
 153 #define DEFAULT_UST_CHANNEL_SWITCH_TIMER        \
 154                 DEFAULT_CHANNEL_SWITCH_TIMER
 155 #define DEFAULT_UST_CHANNEL_READ_TIMER      0  /* usec */
 156
 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
 164 /* Default network ports for trace streaming support */
 165 #define DEFAULT_NETWORK_CONTROL_PORT        5342
 166 #define DEFAULT_NETWORK_DATA_PORT           5343
 167
 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
 175 /*
 176  * Wait period before retrying the lttng_data_pending command in the lttng
 177  * stop command of liblttng-ctl.
 178  */
 179 #define DEFAULT_DATA_AVAILABILITY_WAIT_TIME 200000  /* usec */
 180
 181 /*
 182  * Default receiving and sending timeout for an application socket.
 183  */
 184 #define DEFAULT_APP_SOCKET_RW_TIMEOUT       5  /* sec */
 185 #define DEFAULT_APP_SOCKET_TIMEOUT_ENV      "LTTNG_APP_SOCKET_TIMEOUT"
 186
 187 #define DEFAULT_UST_STREAM_FD_NUM                       2 /* Number of fd per UST stream. */
 188
 189 extern size_t default_channel_subbuf_size;
 190 extern size_t default_metadata_subbuf_size;
 191 extern size_t default_ust_channel_subbuf_size;
 192 extern size_t default_kernel_channel_subbuf_size;
 193
 194
 195 /*
 196  * Returns the default subbuf size.
 197  *
 198  * This function depends on a value that is set at constructor time, so it is
 199  * unsafe to call it from another constructor.
 200  */
 201 static inline
 202 size_t default_get_channel_subbuf_size(void)
 203 {
 204         return default_channel_subbuf_size;
 205 }
 206
 207 /*
 208  * Returns the default metadata subbuf size.
 209  *
 210  * This function depends on a value that is set at constructor time, so it is
 211  * unsafe to call it from another constructor.
 212  */
 213 static inline
 214 size_t default_get_metadata_subbuf_size(void)
 215 {
 216         return default_metadata_subbuf_size;
 217 }
 218
 219 /*
 220  * Returns the default subbuf size for the kernel domain.
 221  *
 222  * This function depends on a value that is set at constructor time, so it is
 223  * unsafe to call it from another constructor.
 224  */
 225 static inline
 226 size_t default_get_kernel_channel_subbuf_size(void)
 227 {
 228         return default_kernel_channel_subbuf_size;
 229 }
 230
 231 /*
 232  * Returns the default subbuf size for the UST domain.
 233  *
 234  * This function depends on a value that is set at constructor time, so it is
 235  * unsafe to call it from another constructor.
 236  */
 237 static inline
 238 size_t default_get_ust_channel_subbuf_size(void)
 239 {
 240         return default_ust_channel_subbuf_size;
 241 }
 242
 243 #endif /* _DEFAULTS_H */