--- a/hotspot/src/share/vm/runtime/os.cpp Fri Sep 14 22:00:41 2012 -0700
+++ b/hotspot/src/share/vm/runtime/os.cpp Mon Sep 17 07:36:31 2012 -0400
@@ -201,14 +201,21 @@
}
}
-
+// The mapping from OS priority back to Java priority may be inexact because
+// Java priorities can map M:1 with native priorities. If you want the definite
+// Java priority then use JavaThread::java_priority()
OSReturn os::get_priority(const Thread* const thread, ThreadPriority& priority) {
int p;
int os_prio;
OSReturn ret = get_native_priority(thread, &os_prio);
if (ret != OS_OK) return ret;
- for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] > os_prio; p--) ;
+ if (java_to_os_priority[MaxPriority] > java_to_os_priority[MinPriority]) {
+ for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] > os_prio; p--) ;
+ } else {
+ // niceness values are in reverse order
+ for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] < os_prio; p--) ;
+ }
priority = (ThreadPriority)p;
return OS_OK;
}