--- a/hotspot/src/cpu/x86/vm/vm_version_x86.cpp Tue Aug 16 11:53:57 2011 -0700
+++ b/hotspot/src/cpu/x86/vm/vm_version_x86.cpp Tue Aug 16 16:59:46 2011 -0700
@@ -557,14 +557,16 @@
if( !supports_sse() && supports_3dnow_prefetch() ) AllocatePrefetchInstr = 3;
// Allocation prefetch settings
- intx cache_line_size = L1_data_cache_line_size();
+ intx cache_line_size = prefetch_data_size();
if( cache_line_size > AllocatePrefetchStepSize )
AllocatePrefetchStepSize = cache_line_size;
- if( FLAG_IS_DEFAULT(AllocatePrefetchLines) )
- AllocatePrefetchLines = 3; // Optimistic value
+
assert(AllocatePrefetchLines > 0, "invalid value");
- if( AllocatePrefetchLines < 1 ) // set valid value in product VM
- AllocatePrefetchLines = 1; // Conservative value
+ if( AllocatePrefetchLines < 1 ) // set valid value in product VM
+ AllocatePrefetchLines = 3;
+ assert(AllocateInstancePrefetchLines > 0, "invalid value");
+ if( AllocateInstancePrefetchLines < 1 ) // set valid value in product VM
+ AllocateInstancePrefetchLines = 1;
AllocatePrefetchDistance = allocate_prefetch_distance();
AllocatePrefetchStyle = allocate_prefetch_style();
@@ -601,10 +603,11 @@
tty->print_cr("Logical CPUs per core: %u",
logical_processors_per_package());
tty->print_cr("UseSSE=%d",UseSSE);
- tty->print("Allocation: ");
+ tty->print("Allocation");
if (AllocatePrefetchStyle <= 0 || UseSSE == 0 && !supports_3dnow_prefetch()) {
- tty->print_cr("no prefetching");
+ tty->print_cr(": no prefetching");
} else {
+ tty->print(" prefetching: ");
if (UseSSE == 0 && supports_3dnow_prefetch()) {
tty->print("PREFETCHW");
} else if (UseSSE >= 1) {
@@ -619,9 +622,9 @@
}
}
if (AllocatePrefetchLines > 1) {
- tty->print_cr(" %d, %d lines with step %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize);
+ tty->print_cr(" at distance %d, %d lines of %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize);
} else {
- tty->print_cr(" %d, one line", AllocatePrefetchDistance);
+ tty->print_cr(" at distance %d, one line of %d bytes", AllocatePrefetchDistance, AllocatePrefetchStepSize);
}
}