Rename lttngerr.h to error.h
[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 it
6 * under the terms of the GNU General Public License as published by the Free
7 * Software Foundation; only version 2 of the License.
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
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
9bda164d 13 *
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14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307, USA.
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17 */
18
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19#ifndef _DEFAULTS_H
20#define _DEFAULTS_H
e848fc76 21
f6a9efaa 22/* Default size of a hash table */
bec39940 23#define DEFAULT_HT_SIZE 4
f6a9efaa 24
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25/* Default lttng run directory */
26#define DEFAULT_LTTNG_RUNDIR "/var/run/lttng"
27#define DEFAULT_LTTNG_HOME_RUNDIR "%s/.lttng"
28
29/* Default unix socket path */
30#define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/client-lttng-sessiond"
31#define DEFAULT_GLOBAL_APPS_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/apps-lttng-sessiond"
32#define DEFAULT_HOME_APPS_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/apps-lttng-sessiond"
33#define DEFAULT_HOME_CLIENT_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/client-lttng-sessiond"
34
35/*
36 * Value taken from the hard limit allowed by the kernel when using setrlimit
37 * with RLIMIT_NOFILE on an Intel i7 CPU and Linux 3.0.3.
38 */
39#define DEFAULT_POLL_SIZE 65535
40
f3ed775e 41/* Default channel attributes */
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42#define DEFAULT_CHANNEL_NAME "channel0"
43#define DEFAULT_CHANNEL_OVERWRITE 0 /* usec */
7d452e12 44/* DEFAULT_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
3817e7df 45#define DEFAULT_CHANNEL_SUBBUF_SIZE 4096 /* bytes */
7d452e12 46/* DEFAULT_CHANNEL_SUBBUF_NUM must always be a power of 2 */
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47#define DEFAULT_CHANNEL_SUBBUF_NUM 8
48#define DEFAULT_CHANNEL_SWITCH_TIMER 0 /* usec */
b389abbe 49#define DEFAULT_CHANNEL_READ_TIMER 200 /* usec */
3817e7df 50#define DEFAULT_CHANNEL_OUTPUT LTTNG_EVENT_MMAP
b389abbe 51
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52#define DEFAULT_METADATA_SUBBUF_SIZE 4096
53#define DEFAULT_METADATA_SUBBUF_NUM 2
e6ddca71 54
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55/* Kernel has different defaults */
56
57/* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
3817e7df 58#define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE 262144 /* bytes */
b389abbe 59/* DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM must always be a power of 2 */
3817e7df 60#define DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM 4
b389abbe 61/* See lttng-kernel.h enum lttng_kernel_output for channel output */
3817e7df 62#define DEFAULT_KERNEL_CHANNEL_OUTPUT LTTNG_EVENT_SPLICE
f3ed775e 63
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64/* User space defaults */
65
66/* Must be a power of 2 */
67#define DEFAULT_UST_CHANNEL_SUBBUF_SIZE 4096 /* bytes */
68/* Must be a power of 2 */
69#define DEFAULT_UST_CHANNEL_SUBBUF_NUM 4
28ca4a8b 70/* See lttng-ust.h enum lttng_ust_output */
d41f73b7 71#define DEFAULT_UST_CHANNEL_OUTPUT LTTNG_EVENT_MMAP
0b0dd29a 72
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73/*
74 * Default timeout value for the sem_timedwait() call. Blocking forever is not
75 * wanted so a timeout is used to control the data flow and not freeze the
76 * session daemon.
77 */
78#define DEFAULT_SEM_WAIT_TIMEOUT 30 /* in seconds */
79
990570ed 80#endif /* _DEFAULTS_H */
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