Changeset f94e76ba in rtems

Timestamp:

07/28/99 18:03:20 (24 years ago)

Author:

Joel Sherrill <joel.sherrill@…>

Branches:

4.10, 4.11, 4.8, 4.9, 5, master

Children:

e112b63

Parents:

f28dfb36

Message:

Fix after this report from Peter Pointner <pr@…>:

Problem: a posix thread which is created by

pthread_attr_init(&tattr);
pthread_attr_setinheritsched(&tattr, PTHREAD_EXPLICIT_SCHED);
pthread_attr_setschedpolicy(&tattr, SCHED_RR);
pthread_create(&th, &tattr, func, arg);

has a first timeslice of 2^{32 ticks (changing a running thread to
SCHED_RR id ok).}

I use RTEMS-4.0.0. I am not sure if the problem exists in the current CVS
head revision. If it's not fixed, the patch at the end should do it.

Peter

--- pthreadcreate.c.orig Wed Jul 28 14:45:58 1999
+++ pthreadcreate.c Wed Jul 28 15:06:09 1999
@@ -199,6 +199,10 @@

api->schedpolicy = schedpolicy;
api->schedparam = schedparam;

+ if ( schedpolicy == SCHED_RR ) {
+ the_thread->cpu_time_budget = _Thread_Ticks_per_timeslice;
+ }
+

/*

• This insures we evaluate the process-wide signals pending when we
• first run.

Files:

• c/src/exec/score/src/threadinitialize.c (modified) (1 diff)
• cpukit/score/src/threadinitialize.c (modified) (1 diff)

c/src/exec/score/src/threadinitialize.c

@@ -138 +138 @@
   the_thread->Start.budget_algorithm = budget_algorithm;
   the_thread->Start.budget_callout   = budget_callout;
+
+  switch ( budget_algorithm ) {
+    case THREAD_CPU_BUDGET_ALGORITHM_NONE:
+    case THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE:
+      break;
+    case THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE:
+      the_thread->cpu_time_budget = _Thread_Ticks_per_timeslice;
+      break;
+    case THREAD_CPU_BUDGET_ALGORITHM_CALLOUT:
+      break;
+  }
+
   the_thread->Start.isr_level        = isr_level;
 

cpukit/score/src/threadinitialize.c

@@ -138 +138 @@
   the_thread->Start.budget_algorithm = budget_algorithm;
   the_thread->Start.budget_callout   = budget_callout;
+
+  switch ( budget_algorithm ) {
+    case THREAD_CPU_BUDGET_ALGORITHM_NONE:
+    case THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE:
+      break;
+    case THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE:
+      the_thread->cpu_time_budget = _Thread_Ticks_per_timeslice;
+      break;
+    case THREAD_CPU_BUDGET_ALGORITHM_CALLOUT:
+      break;
+  }
+
   the_thread->Start.isr_level        = isr_level;