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8049717: expose L1_data_cache_line_size for diagnostic/sanity checks

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Add support for VM_Version::L1_data_cache_line_size().

Reviewed-by: dsimms, kvn, dholmes
This commit is contained in:
Daniel D. Daugherty 2014-07-15 07:33:49 -07:00
parent a36ef5533f
commit a06d36cada
10 changed files with 194 additions and 17 deletions
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7
hotspot/src/share/vm/runtime/vm_version.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -42,6 +42,7 @@ class Abstract_VM_Version: AllStatic {
static bool _supports_atomic_getadd4;
static bool _supports_atomic_getadd8;
static unsigned int _logical_processors_per_package;
static unsigned int _L1_data_cache_line_size;
static int _vm_major_version;
static int _vm_minor_version;
static int _vm_micro_version;
@ -98,6 +99,10 @@ class Abstract_VM_Version: AllStatic {
return _logical_processors_per_package;
}
static unsigned int L1_data_cache_line_size() {
return _L1_data_cache_line_size;
}
// Need a space at the end of TLAB for prefetch instructions
// which may fault when accessing memory outside of heap.
static int reserve_for_allocation_prefetch() {