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dmeventd: prevent busy looping on CPU

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Use usleep when looping on DM_WAIT_RETRY.
This commit is contained in:
Zdenek Kabelac 2012-03-22 17:00:25 +01:00
parent b87c148499
commit 7c5feaed3b
2 changed files with 4 additions and 1 deletions
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1
WHATS_NEW_DM
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@ -1,5 +1,6 @@
Version 1.02.84 - Version 1.02.84 -
==================================== ====================================
Avoid busy looping on CPU when dmeventd reads event DM_WAIT_RETRY.
Ensure global mutex is being hold when working with dmeventd thread. Ensure global mutex is being hold when working with dmeventd thread.
Drop taking timeout mutex for un/registering dmeventd monitor. Drop taking timeout mutex for un/registering dmeventd monitor.
Allow section names in config file data to be quoted strings. Allow section names in config file data to be quoted strings.

4
daemons/dmeventd/dmeventd.c
View File

@ -796,8 +796,10 @@ static void *_monitor_thread(void *arg)
thread->current_events = 0; thread->current_events = 0;
wait_error = _event_wait(thread, &task); wait_error = _event_wait(thread, &task);
if (wait_error == DM_WAIT_RETRY) if (wait_error == DM_WAIT_RETRY) {
usleep(100); /* avoid busy loop */
continue; continue;
}
if (wait_error == DM_WAIT_FATAL) if (wait_error == DM_WAIT_FATAL)
break; break;