Changeset 6a27d63 in mainline for src/proc/scheduler.c

Timestamp:

2005-05-11T21:53:09Z (20 years ago)

Author:

Jakub Vana <jakub.vana@…>

Branches:

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

Children:

c884ef1

Parents:

6ba143d

Message:

Finished FPU lazy context switching - first version. I have not tested it and there are many things which must be changed when
it runs first time OK.

File:

• src/proc/scheduler.c (modified) (2 diffs)

src/proc/scheduler.c

@@ -268 +268 @@
                             list_remove(&THREAD->threads_link);
                             spinlock_unlock(&threads_lock);
+
+                            spinlock_lock(&THREAD->cpu->lock);
+                            if(THREAD->cpu->arch.fpu_owner==THREAD) THREAD->cpu->arch.fpu_owner=NULL;
+                            spinlock_unlock(&THREAD->cpu->lock);
+
                             
                             free(THREAD);
@@ -428 +433 @@
                                  * We don't want to steal CPU-wired threads neither threads already stolen.
                                  * The latter prevents threads from migrating between CPU's without ever being run.
-                                 */
+                                 * We don't want to steal threads whose FPU context is still in CPU
+                                 */
                                 spinlock_lock(&t->lock);
-                                if (!(t->flags & (X_WIRED | X_STOLEN))) {
+                                if ( (!(t->flags & (X_WIRED | X_STOLEN))) && (!(t->fpu_context_engaged)) ) {
                                         /*
                                          * Remove t from r.