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bird/sysdep/unix/config.Y
Maria Matejka 84c298465f Decoupling loops from threads to allow fixed thread count
On large configurations, too many threads would spawn with one thread
per loop. Therefore, threads may now run multiple loops at once. The
thread count is configurable and may be changed during run. All threads
are spawned on startup.

This change helps with memory bloating. BIRD filters need large
temporary memory blocks to store their stack and also memory management
keeps its hot page storage per-thread.

Known bugs:
* Thread autobalancing is not yet implemented.
* Low latency loops are executed together with standard loops.
2023-01-19 11:13:50 +01:00

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/*
* BIRD -- UNIX Configuration
*
* (c) 1999--2000 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#include "sysdep/unix/unix.h"
#include <stdio.h>
CF_DEFINES
static struct log_config *this_log;
CF_DECLS
CF_KEYWORDS(LOG, SYSLOG, ALL, DEBUG, TRACE, INFO, REMOTE, WARNING, ERROR, AUTH, FATAL, BUG, STDERR, SOFT)
CF_KEYWORDS(NAME, CONFIRM, UNDO, CHECK, TIMEOUT, DEBUG, LATENCY, LIMIT, WATCHDOG, WARNING, STATUS)
CF_KEYWORDS(GRACEFUL, RESTART)
%type <i> log_mask log_mask_list log_cat cfg_timeout
%type <t> cfg_name
%type <tf> timeformat_which
%type <t> syslog_name
CF_GRAMMAR
conf: log_config ;
log_begin: { this_log = cfg_allocz(sizeof(struct log_config)); };
log_config: LOG log_begin log_file log_mask ';' {
this_log->mask = $4;
add_tail(&new_config->logfiles, &this_log->n);
}
;
syslog_name:
NAME text { $$ = $2; }
| { $$ = bird_name; }
;
log_limit:
/* empty */
| expr text { this_log->limit = $1; this_log->backup = $2; }
;
log_file:
text log_limit {
if (!parse_and_exit)
{
this_log->rf = rf_open(new_config->pool, $1, "a");
if (!this_log->rf) cf_error("Unable to open log file '%s': %m", $1);
this_log->fh = rf_file(this_log->rf);
}
this_log->pos = -1;
this_log->filename = $1;
}
| SYSLOG syslog_name { this_log->fh = NULL; new_config->syslog_name = $2; }
| STDERR { this_log->fh = stderr; }
;
log_mask:
ALL { $$ = ~0; }
| '{' log_mask_list '}' { $$ = $2; }
;
log_mask_list:
log_cat { $$ = 1 << $1; }
| log_mask_list ',' log_cat { $$ = $1 | (1 << $3); }
;
log_cat:
DEBUG { $$ = L_DEBUG[0]; }
| TRACE { $$ = L_TRACE[0]; }
| INFO { $$ = L_INFO[0]; }
| REMOTE { $$ = L_REMOTE[0]; }
| WARNING { $$ = L_WARN[0]; }
| ERROR { $$ = L_ERR[0]; }
| AUTH { $$ = L_AUTH[0]; }
| FATAL { $$ = L_FATAL[0]; }
| BUG { $$ = L_BUG[0]; }
;
conf: mrtdump_base ;
mrtdump_base:
MRTDUMP PROTOCOLS mrtdump_mask ';' { new_config->proto_default_mrtdump = $3; }
| MRTDUMP text ';' {
if (!parse_and_exit)
{
struct rfile *f = rf_open(new_config->pool, $2, "a");
if (!f) cf_error("Unable to open MRTDump file '%s': %m", $2);
new_config->mrtdump_file = rf_fileno(f);
}
}
;
conf: THREADS expr {
if ($2 < 1) cf_error("Number of threads must be at least one.");
new_config->thread_count = $2;
}
conf: debug_unix ;
debug_unix:
DEBUG LATENCY bool { new_config->latency_debug = $3; }
| DEBUG LATENCY LIMIT expr_us { new_config->latency_limit = $4; }
| WATCHDOG WARNING expr_us { new_config->watchdog_warning = $3; }
| WATCHDOG TIMEOUT expr_us { new_config->watchdog_timeout = ($3 + 999999) TO_S; }
;
/* Unix specific commands */
CF_CLI_HELP(CONFIGURE, ..., [[Reload configuration]])
CF_CLI(CONFIGURE, cfg_name cfg_timeout, [\"<file>\"] [timeout [<sec>]], [[Reload configuration]])
{ cmd_reconfig($2, RECONFIG_HARD, $3); } ;
CF_CLI(CONFIGURE SOFT, cfg_name cfg_timeout, [\"<file>\"] [timeout [<sec>]], [[Reload configuration and ignore changes in filters]])
{ cmd_reconfig($3, RECONFIG_SOFT, $4); } ;
/* Hack to get input completion for 'timeout' */
CF_CLI_CMD(CONFIGURE TIMEOUT, [<sec>], [[Reload configuration with undo timeout]])
CF_CLI_CMD(CONFIGURE SOFT TIMEOUT, [<sec>], [[Reload configuration with undo timeout]])
CF_CLI(CONFIGURE CONFIRM,,, [[Confirm last configuration change - deactivate undo timeout]])
{ cmd_reconfig_confirm(); } ;
CF_CLI(CONFIGURE UNDO,,, [[Undo last configuration change]])
{ cmd_reconfig_undo(); } ;
CF_CLI(CONFIGURE STATUS,,, [[Show configuration status]])
{ cmd_reconfig_status(); } ;
CF_CLI(CONFIGURE CHECK, cfg_name, [\"<file>\"], [[Parse configuration and check its validity]])
{ cmd_check_config($3); } ;
CF_CLI(DOWN,,, [[Shut the daemon down]])
{ cmd_shutdown(); } ;
CF_CLI_HELP(GRACEFUL, restart, [[Shut the daemon down for graceful restart]])
CF_CLI(GRACEFUL RESTART,,, [[Shut the daemon down for graceful restart]])
{ cmd_graceful_restart(); } ;
CF_CLI(SHOW THREADS,,, [[Write out thread information]])
{ cmd_show_threads(0); } ;
CF_CLI(SHOW THREADS ALL,,, [[Write out thread and IO loop information]])
{ cmd_show_threads(1); } ;
cfg_name:
/* empty */ { $$ = NULL; }
| TEXT
;
cfg_timeout:
/* empty */ { $$ = 0; }
| TIMEOUT { $$ = UNIX_DEFAULT_CONFIGURE_TIMEOUT; }
| TIMEOUT expr { $$ = $2; }
;
CF_CODE
CF_END