X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/a1c7dba18ef36983396c282fe85292db066e39db..3903760236c30e3b5ace7a4eefac3a269d68957c:/tools/tests/jitter/timer_jitter.c

diff --git a/tools/tests/jitter/timer_jitter.c b/tools/tests/jitter/timer_jitter.c
index abcfe87b8..7e0c9a0c1 100644
--- a/tools/tests/jitter/timer_jitter.c
+++ b/tools/tests/jitter/timer_jitter.c
@@ -47,6 +47,8 @@
 #include <mach/task.h>
 #include <mach/semaphore.h>
 
+#include <libproc_internal.h>
+
 typedef enum my_policy_type { MY_POLICY_REALTIME, MY_POLICY_TIMESHARE, MY_POLICY_FIXEDPRI } my_policy_type_t;
 
 #define DEFAULT_MAX_SLEEP_NS	2000000000ll /* Two seconds */
@@ -354,6 +356,18 @@ main(int argc, char **argv)
 		exit(1);
 	}
 
+	/*
+	 * Disable the wake monitor.  If we are
+	 * performing a large number of
+	 * iterations, the wake monitor may
+	 * cause this process to get suspended,
+	 * thus causing a large jitter value.
+	 */
+	if (proc_disable_wakemon(getpid()) != KERN_SUCCESS) {
+		printf("Couldn't disable wake monitor.\n");
+		/* For now, do not exit; this call could be locked down */
+	}
+
 	/* 
 	 * Repeatedly pick a random timer length and 
 	 * try to sleep exactly that long