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8208277: Code cache heap (-XX:ReservedCodeCacheSize) doesn't work with 1GB LargePages

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Use huge pages for code cache if ReservedCodeCacheSize == InitialCodeCacheSize

Reviewed-by: kvn
This commit is contained in:
Tobias Hartmann 2018-12-06 10:07:54 +01:00
parent 4a28e27fd2
commit d4acf96543
3 changed files with 14 additions and 7 deletions
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12
src/hotspot/share/code/codeCache.cpp
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@ -289,7 +289,7 @@ void CodeCache::initialize_heaps() {
// If large page support is enabled, align code heaps according to large
// page size to make sure that code cache is covered by large pages.
const size_t alignment = MAX2(page_size(false), (size_t) os::vm_allocation_granularity());
const size_t alignment = MAX2(page_size(false, 8), (size_t) os::vm_allocation_granularity());
non_nmethod_size = align_up(non_nmethod_size, alignment);
profiled_size = align_down(profiled_size, alignment);
@ -314,10 +314,14 @@ void CodeCache::initialize_heaps() {
add_heap(non_profiled_space, "CodeHeap 'non-profiled nmethods'", CodeBlobType::MethodNonProfiled);
}
size_t CodeCache::page_size(bool aligned) {
size_t CodeCache::page_size(bool aligned, size_t min_pages) {
if (os::can_execute_large_page_memory()) {
return aligned ? os::page_size_for_region_aligned(ReservedCodeCacheSize, 8) :
os::page_size_for_region_unaligned(ReservedCodeCacheSize, 8);
if (InitialCodeCacheSize < ReservedCodeCacheSize) {
// Make sure that the page size allows for an incremental commit of the reserved space
min_pages = MAX2(min_pages, (size_t)8);
}
return aligned ? os::page_size_for_region_aligned(ReservedCodeCacheSize, min_pages) :
os::page_size_for_region_unaligned(ReservedCodeCacheSize, min_pages);
} else {
return os::vm_page_size();
}