Re: Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.31-7

[Ingo Molnar <mingo@elte.hu>]

> > --- ./drivers/alsa/alsa_driver.c.orig	2004-11-26 14:11:26.000000000 +0100
> > +++ ./drivers/alsa/alsa_driver.c	2004-11-26 14:24:41.000000000 +0100

find yet another approach below - it aborts jackd when the first xrun
happens. Since an xrun can trigger other xruns, the most reliable trace
would be the first xrun that triggers.

	Ingo

--- ./drivers/alsa/alsa_driver.c.orig	2004-11-26 14:11:26.000000000 +0100
+++ ./drivers/alsa/alsa_driver.c	2004-11-29 17:39:15.985918576 +0100
@@ -1077,13 +1077,17 @@ alsa_driver_xrun_recovery (alsa_driver_t
 	    && driver->process_count > XRUN_REPORT_DELAY) {
 		struct timeval now, diff, tstamp;
 		driver->xrun_count++;
+		gettimeofday(0,0);
 		gettimeofday(&now, 0);
 		snd_pcm_status_get_trigger_tstamp(status, &tstamp);
 		timersub(&now, &tstamp, &diff);
 		*delayed_usecs = diff.tv_sec * 1000000.0 + diff.tv_usec;
+#if 1
 		fprintf(stderr, "\n\n**** alsa_pcm: xrun of at least %.3f "
 			"msecs\n\n",
 			*delayed_usecs / 1000.0);
+#endif
+		exit(-1);
 	}
 
 	if (alsa_driver_stop (driver) ||
@@ -1185,6 +1189,7 @@ alsa_driver_wait (alsa_driver_t *driver,
 			nfds++;
 		}
 
+		gettimeofday(0,1);
 		poll_enter = jack_get_microseconds ();
 
 		if (poll (driver->pfd, nfds, driver->poll_timeout) < 0) {