[Commit-gnuradio] r6425 - gnuradio/branches/developers/michaelld/mc_and_rt/gnuradio-core/src/lib/runtime

[michaelld]

Author: michaelld
Date: 2007-09-13 14:02:43 -0600 (Thu, 13 Sep 2007)
New Revision: 6425

Modified:
   
gnuradio/branches/developers/michaelld/mc_and_rt/gnuradio-core/src/lib/runtime/gr_realtime.cc
Log:
Fix to make realtime using 'pthread_setschedparam' equivalent to that
provided by 'sched_setscheduler'.



Modified: 
gnuradio/branches/developers/michaelld/mc_and_rt/gnuradio-core/src/lib/runtime/gr_realtime.cc
===================================================================
--- 
gnuradio/branches/developers/michaelld/mc_and_rt/gnuradio-core/src/lib/runtime/gr_realtime.cc
       2007-09-13 18:45:31 UTC (rev 6424)
+++ 
gnuradio/branches/developers/michaelld/mc_and_rt/gnuradio-core/src/lib/runtime/gr_realtime.cc
       2007-09-13 20:02:43 UTC (rev 6425)
@@ -65,23 +65,14 @@
 gr_rt_status_t
 gr_enable_realtime_scheduling()
 {
-  int policy = 0;
-  int pri = 0;
+  int policy = SCHED_FIFO;
+  int pri = (sched_get_priority_max (policy) +
+            sched_get_priority_min (policy)) / 2;
   pthread_t this_thread = pthread_self ();  // this process
   struct sched_param param;
   memset (&param, 0, sizeof (param));
   param.sched_priority = pri;
-  int result = pthread_getschedparam (this_thread, &policy, &param);
-  if (result == 0) { // good results
-    // set the priority half-way between the default and maximum
-    pri = (sched_get_priority_max (policy) + param.sched_priority) / 2;
-
-    int policy = SCHED_FIFO;   // desired policy
-    struct sched_param param;
-    memset (&param, 0, sizeof (struct sched_param));
-    param.sched_priority = pri;
-    result = pthread_setschedparam (this_thread, policy, &param);
-  }
+  int result = pthread_setschedparam (this_thread, policy, &param);
   if (result != 0) {
     if (errno == EPERM)
       return RT_NO_PRIVS;
@@ -90,7 +81,7 @@
       return RT_OTHER_ERROR;
     }
   }
-  // printf ("SCHED_FIFO enabled with priority = %d\n", pri);
+  printf("SCHED_FIFO enabled with priority = %d\n", pri);
   return RT_OK;
 }