GSN-EDF: facilitate debugging

Make CPU state available to gdb.

1 files changed, 6 insertions, 3 deletions

diff --git a/litmus/sched_gsn_edf.c b/litmus/sched_gsn_edf.c
index 854dfcf141..08069abe1c 100644
--- a/litmus/sched_gsn_edf.c
+++ b/litmus/sched_gsn_edf.c
@@ -99,6 +99,8 @@ typedef struct  {
 } cpu_entry_t;
 DEFINE_PER_CPU(cpu_entry_t, gsnedf_cpu_entries);
 
+cpu_entry_t* gsnedf_cpus[NR_CPUS];
+
 #define set_will_schedule() \
         (atomic_set(&__get_cpu_var(gsnedf_cpu_entries).will_schedule, 1))
 #define clear_will_schedule() \
@@ -292,7 +294,7 @@ static noinline void gsnedf_job_arrival(struct task_struct* task)
         if (edf_preemption_needed(&gsnedf, last->linked)) {
                 /* preemption necessary */
                 task = __take_ready(&gsnedf);
-                TRACE("job_arrival: task %d linked to %d\n",
+                TRACE("job_arrival: attempting to link task %d to %d\n",
                       task->pid, last->cpu);
                 if (last->linked)
                         requeue(last->linked);
@@ -386,8 +388,8 @@ static void gsnedf_tick(struct task_struct* t)
  */
 static struct task_struct* gsnedf_schedule(struct task_struct * prev)
 {
-        cpu_entry_t*    entry = &__get_cpu_var(gsnedf_cpu_entries);
-        int                     out_of_time, sleep, preempt, np, exists, blocks;
+        cpu_entry_t* entry = &__get_cpu_var(gsnedf_cpu_entries);
+        int out_of_time, sleep, preempt, np, exists, blocks;    
         struct task_struct* next = NULL;
 
         /* Will be released in finish_switch. */
@@ -695,6 +697,7 @@ static int __init init_gsn_edf(void)
         /* initialize CPU state */
         for (cpu = 0; cpu < NR_CPUS; cpu++)  {
                 entry = &per_cpu(gsnedf_cpu_entries, cpu);
+                gsnedf_cpus[cpu] = entry;
                 atomic_set(&entry->will_schedule, 0);
                 entry->linked    = NULL;
                 entry->scheduled = NULL;