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Reduce some logging contention by switching several locks over to rwlocks

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@76015 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
2007-07-20 01:54:52 +00:00
parent 0e969271ae
commit 4af3f12b29
1 changed files with 46 additions and 42 deletions
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88
main/logger.c
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@@ -113,7 +113,7 @@ struct logchannel {
AST_LIST_ENTRY(logchannel) list;
};
static AST_LIST_HEAD_STATIC(logchannels, logchannel);
static AST_RWLIST_HEAD_STATIC(logchannels, logchannel);
enum logmsgtypes {
LOGMSG_NORMAL = 0,
@@ -314,10 +314,10 @@ static void init_logger_chain(void)
const char *s;
/* delete our list of log channels */
AST_LIST_LOCK(&logchannels);
while ((chan = AST_LIST_REMOVE_HEAD(&logchannels, list)))
AST_RWLIST_WRLOCK(&logchannels);
while ((chan = AST_RWLIST_REMOVE_HEAD(&logchannels, list)))
free(chan);
AST_LIST_UNLOCK(&logchannels);
AST_RWLIST_UNLOCK(&logchannels);
global_logmask = 0;
errno = 0;
@@ -336,9 +336,9 @@ static void init_logger_chain(void)
return;
chan->type = LOGTYPE_CONSOLE;
chan->logmask = 28; /*warning,notice,error */
AST_LIST_LOCK(&logchannels);
AST_LIST_INSERT_HEAD(&logchannels, chan, list);
AST_LIST_UNLOCK(&logchannels);
AST_RWLIST_WRLOCK(&logchannels);
AST_RWLIST_INSERT_HEAD(&logchannels, chan, list);
AST_RWLIST_UNLOCK(&logchannels);
global_logmask |= chan->logmask;
return;
}
@@ -366,15 +366,15 @@ static void init_logger_chain(void)
if ((s = ast_variable_retrieve(cfg, "general", "rotatetimestamp")))
rotatetimestamp = ast_true(s);
AST_LIST_LOCK(&logchannels);
AST_RWLIST_WRLOCK(&logchannels);
var = ast_variable_browse(cfg, "logfiles");
for (; var; var = var->next) {
if (!(chan = make_logchannel(var->name, var->value, var->lineno)))
continue;
AST_LIST_INSERT_HEAD(&logchannels, chan, list);
AST_RWLIST_INSERT_HEAD(&logchannels, chan, list);
global_logmask |= chan->logmask;
}
AST_LIST_UNLOCK(&logchannels);
AST_RWLIST_UNLOCK(&logchannels);
ast_config_destroy(cfg);
}
@@ -382,16 +382,20 @@ static void init_logger_chain(void)
void ast_queue_log(const char *queuename, const char *callid, const char *agent, const char *event, const char *fmt, ...)
{
va_list ap;
AST_LIST_LOCK(&logchannels);
char qlog_msg[8192];
int qlog_len;
if (qlog) {
va_start(ap, fmt);
fprintf(qlog, "%ld|%s|%s|%s|%s|", (long)time(NULL), callid, queuename, agent, event);
vfprintf(qlog, fmt, ap);
fprintf(qlog, "\n");
qlog_len = snprintf(qlog_msg, sizeof(qlog_msg), "%ld|%s|%s|%s|%s|", (long)time(NULL), callid, queuename, agent, event);
vsnprintf(qlog_msg + qlog_len, sizeof(qlog_msg) - qlog_len, fmt, ap);
va_end(ap);
}
AST_RWLIST_RDLOCK(&logchannels);
if (qlog) {
fprintf(qlog, "%s\n", qlog_msg);
fflush(qlog);
}
AST_LIST_UNLOCK(&logchannels);
AST_RWLIST_UNLOCK(&logchannels);
}
int reload_logger(int rotate)
@@ -403,7 +407,7 @@ int reload_logger(int rotate)
FILE *myf;
int x, res = 0;
AST_LIST_LOCK(&logchannels);
AST_RWLIST_WRLOCK(&logchannels);
if (eventlog)
fclose(eventlog);
@@ -419,7 +423,7 @@ int reload_logger(int rotate)
ast_mkdir(ast_config_AST_LOG_DIR, 0777);
AST_LIST_TRAVERSE(&logchannels, f, list) {
AST_RWLIST_TRAVERSE(&logchannels, f, list) {
if (f->disabled) {
f->disabled = 0; /* Re-enable logging at reload */
manager_event(EVENT_FLAG_SYSTEM, "LogChannel", "Channel: %s\r\nEnabled: Yes\r\n", f->filename);
@@ -516,7 +520,7 @@ int reload_logger(int rotate)
}
}
AST_LIST_UNLOCK(&logchannels);
AST_RWLIST_UNLOCK(&logchannels);
return res;
}
@@ -549,8 +553,8 @@ static int handle_logger_show_channels(int fd, int argc, char *argv[])
ast_cli(fd, "Configuration\n");
ast_cli(fd,FORMATL, "-------", "----", "------");
ast_cli(fd, "-------------\n");
AST_LIST_LOCK(&logchannels);
AST_LIST_TRAVERSE(&logchannels, chan, list) {
AST_RWLIST_RDLOCK(&logchannels);
AST_RWLIST_TRAVERSE(&logchannels, chan, list) {
ast_cli(fd, FORMATL, chan->filename, chan->type==LOGTYPE_CONSOLE ? "Console" : (chan->type==LOGTYPE_SYSLOG ? "Syslog" : "File"),
chan->disabled ? "Disabled" : "Enabled");
ast_cli(fd, " - ");
@@ -570,7 +574,7 @@ static int handle_logger_show_channels(int fd, int argc, char *argv[])
ast_cli(fd, "Event ");
ast_cli(fd, "\n");
}
AST_LIST_UNLOCK(&logchannels);
AST_RWLIST_UNLOCK(&logchannels);
ast_cli(fd, "\n");
return RESULT_SUCCESS;
@@ -581,7 +585,7 @@ struct verb {
AST_LIST_ENTRY(verb) list;
};
static AST_LIST_HEAD_STATIC(verbosers, verb);
static AST_RWLIST_HEAD_STATIC(verbosers, verb);
static char logger_reload_help[] =
"Usage: logger reload\n"
@@ -647,17 +651,17 @@ static void logger_print_normal(struct logmsg *logmsg)
struct logchannel *chan = NULL;
char buf[BUFSIZ];
AST_LIST_LOCK(&logchannels);
AST_RWLIST_RDLOCK(&logchannels);
if (logfiles.event_log && logmsg->level == __LOG_EVENT) {
fprintf(eventlog, "%s asterisk[%ld]: %s", logmsg->date, (long)getpid(), logmsg->str);
fflush(eventlog);
AST_LIST_UNLOCK(&logchannels);
AST_RWLIST_UNLOCK(&logchannels);
return;
}
if (!AST_LIST_EMPTY(&logchannels)) {
AST_LIST_TRAVERSE(&logchannels, chan, list) {
if (!AST_RWLIST_EMPTY(&logchannels)) {
AST_RWLIST_TRAVERSE(&logchannels, chan, list) {
/* If the channel is disabled, then move on to the next one */
if (chan->disabled)
continue;
@@ -714,7 +718,7 @@ static void logger_print_normal(struct logmsg *logmsg)
fputs(logmsg->str, stdout);
}
AST_LIST_UNLOCK(&logchannels);
AST_RWLIST_UNLOCK(&logchannels);
/* If we need to reload because of the file size, then do so */
if (filesize_reload_needed) {
@@ -733,10 +737,10 @@ static void logger_print_verbose(struct logmsg *logmsg)
struct verb *v = NULL;
/* Iterate through the list of verbosers and pass them the log message string */
AST_LIST_LOCK(&verbosers);
AST_LIST_TRAVERSE(&verbosers, v, list)
AST_RWLIST_RDLOCK(&verbosers);
AST_RWLIST_TRAVERSE(&verbosers, v, list)
v->verboser(logmsg->str);
AST_LIST_UNLOCK(&verbosers);
AST_RWLIST_UNLOCK(&verbosers);
return;
}
@@ -833,7 +837,7 @@ void close_logger(void)
ast_cond_signal(&logcond);
AST_LIST_UNLOCK(&logmsgs);
AST_LIST_LOCK(&logchannels);
AST_RWLIST_WRLOCK(&logchannels);
if (eventlog) {
fclose(eventlog);
@@ -845,7 +849,7 @@ void close_logger(void)
qlog = NULL;
}
AST_LIST_TRAVERSE(&logchannels, f, list) {
AST_RWLIST_TRAVERSE(&logchannels, f, list) {
if (f->fileptr && (f->fileptr != stdout) && (f->fileptr != stderr)) {
fclose(f->fileptr);
f->fileptr = NULL;
@@ -854,7 +858,7 @@ void close_logger(void)
closelog(); /* syslog */
AST_LIST_UNLOCK(&logchannels);
AST_RWLIST_UNLOCK(&logchannels);
return;
}
@@ -874,7 +878,7 @@ void ast_log(int level, const char *file, int line, const char *function, const
if (!(buf = ast_str_thread_get(&log_buf, LOG_BUF_INIT_SIZE)))
return;
if (AST_LIST_EMPTY(&logchannels)) {
if (AST_RWLIST_EMPTY(&logchannels)) {
/*
* we don't have the logger chain configured yet,
* so just log to stdout
@@ -1045,9 +1049,9 @@ int ast_register_verbose(void (*v)(const char *string))
verb->verboser = v;
AST_LIST_LOCK(&verbosers);
AST_LIST_INSERT_HEAD(&verbosers, verb, list);
AST_LIST_UNLOCK(&verbosers);
AST_RWLIST_WRLOCK(&verbosers);
AST_RWLIST_INSERT_HEAD(&verbosers, verb, list);
AST_RWLIST_UNLOCK(&verbosers);
return 0;
}
@@ -1056,16 +1060,16 @@ int ast_unregister_verbose(void (*v)(const char *string))
{
struct verb *cur;
AST_LIST_LOCK(&verbosers);
AST_LIST_TRAVERSE_SAFE_BEGIN(&verbosers, cur, list) {
AST_RWLIST_WRLOCK(&verbosers);
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&verbosers, cur, list) {
if (cur->verboser == v) {
AST_LIST_REMOVE_CURRENT(&verbosers, list);
AST_RWLIST_REMOVE_CURRENT(&verbosers, list);
free(cur);
break;
}
}
AST_LIST_TRAVERSE_SAFE_END
AST_LIST_UNLOCK(&verbosers);
AST_RWLIST_TRAVERSE_SAFE_END
AST_RWLIST_UNLOCK(&verbosers);
return cur ? 0 : -1;
}