Changes between Version 28 and Version 29 of Developer/SMP

Timestamp:

01/13/14 16:05:09 (10 years ago)

Author:

Sh

Comment:

/* Semaphores and Mutexes */

Developer/SMP

@@ -496 +496 @@
 
 
+==== Status ====
+
+
+The semaphore and mutex objects use ''_Objects_Get_isr_disable()''.  On SMP
+configurations this first acquires the Giant lock and then interrupts are
+disabled.
+
+==== Future Directions ====
+
+
+Use an ISR lock per object to improve the performance for uncontested
+operations.  See also [[#Giant Lock vs. Fine Grained Locking|Giant Lock vs. Fine Grained Locking]].
+
 == Implementation ==