Changeset 4ffa9e0 in mainline for src/proc/thread.c

Timestamp:

2005-02-23T11:48:52Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

3418c41

Parents:

b109ebb

Message:

New IPI for waking up idle CPU's halted in scheduler.
Added architecture-independent ipi_broadcast().

File:

• src/proc/thread.c (modified) (3 diffs)

src/proc/thread.c

@@ -46 +46 @@
 #include <time/clock.h>
 #include <list.h>
+#include <config.h>
+
+#ifdef __SMP__
+#include <arch/interrupt.h>
+#include <arch/apic.h>
+#endif /* __SMP__ */
 
 char *thread_states[] = {"Invalid", "Running", "Sleeping", "Ready", "Entering", "Exiting"};
@@ -89 +95 @@
         runq_t *r;
         pri_t pri;
-        int i;
+        int i, avg, send_ipi = 0;
 
         pri = cpu_priority_high();
@@ -113 +119 @@
 
         spinlock_lock(&nrdylock);
-        nrdy++;
+        avg = ++nrdy / config.cpu_active;
         spinlock_unlock(&nrdylock);
 
         spinlock_lock(&cpu->lock);
-        cpu->nrdy++;
+        if ((++cpu->nrdy) > avg && (config.cpu_active == config.cpu_count)) {
+                /*
+                 * If there are idle halted CPU's, this will wake them up.
+                 */
+                #ifdef __SMP__
+                l_apic_broadcast_custom_ipi(VECTOR_WAKEUP_IPI);
+                #endif /* __SMP__  */
+        }       
         spinlock_unlock(&cpu->lock);