diff --git a/src/share/vm/memory/allocation.cpp b/src/share/vm/memory/allocation.cpp index c45dab1c4c5ae850fb104285c848a3d7d34fbd5e..6a80c47385e147b6f3422b1d3b055f9f355e8f9c 100644 --- a/src/share/vm/memory/allocation.cpp +++ b/src/share/vm/memory/allocation.cpp @@ -236,10 +236,11 @@ class ChunkPool: public CHeapObj { size_t _num_used; // number of chunks currently checked out const size_t _size; // size of each chunk (must be uniform) - // Our three static pools + // Our four static pools static ChunkPool* _large_pool; static ChunkPool* _medium_pool; static ChunkPool* _small_pool; + static ChunkPool* _tiny_pool; // return first element or null void* get_first() { @@ -319,15 +320,18 @@ class ChunkPool: public CHeapObj { static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } + static ChunkPool* tiny_pool() { assert(_tiny_pool != NULL, "must be initialized"); return _tiny_pool; } static void initialize() { _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); + _tiny_pool = new ChunkPool(Chunk::tiny_size + Chunk::aligned_overhead_size()); } static void clean() { enum { BlocksToKeep = 5 }; + _tiny_pool->free_all_but(BlocksToKeep); _small_pool->free_all_but(BlocksToKeep); _medium_pool->free_all_but(BlocksToKeep); _large_pool->free_all_but(BlocksToKeep); @@ -337,6 +341,7 @@ class ChunkPool: public CHeapObj { ChunkPool* ChunkPool::_large_pool = NULL; ChunkPool* ChunkPool::_medium_pool = NULL; ChunkPool* ChunkPool::_small_pool = NULL; +ChunkPool* ChunkPool::_tiny_pool = NULL; void chunkpool_init() { ChunkPool::initialize(); @@ -376,6 +381,7 @@ void* Chunk::operator new (size_t requested_size, AllocFailType alloc_failmode, case Chunk::size: return ChunkPool::large_pool()->allocate(bytes, alloc_failmode); case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes, alloc_failmode); case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes, alloc_failmode); + case Chunk::tiny_size: return ChunkPool::tiny_pool()->allocate(bytes, alloc_failmode); default: { void* p = os::malloc(bytes, mtChunk, CALLER_PC); if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { @@ -392,6 +398,7 @@ void Chunk::operator delete(void* p) { case Chunk::size: ChunkPool::large_pool()->free(c); break; case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; case Chunk::init_size: ChunkPool::small_pool()->free(c); break; + case Chunk::tiny_size: ChunkPool::tiny_pool()->free(c); break; default: os::free(c, mtChunk); } } diff --git a/src/share/vm/memory/allocation.hpp b/src/share/vm/memory/allocation.hpp index 17654f069845d84a48f325147021d2b8df418063..aa916660d8b6323ffeef183e0a46cd8df86f1cd5 100644 --- a/src/share/vm/memory/allocation.hpp +++ b/src/share/vm/memory/allocation.hpp @@ -353,7 +353,8 @@ class Chunk: CHeapObj { slack = 20, // suspected sizeof(Chunk) + internal malloc headers #endif - init_size = 1*K - slack, // Size of first chunk + tiny_size = 256 - slack, // Size of first chunk (tiny) + init_size = 1*K - slack, // Size of first chunk (normal aka small) medium_size= 10*K - slack, // Size of medium-sized chunk size = 32*K - slack, // Default size of an Arena chunk (following the first) non_pool_size = init_size + 32 // An initial size which is not one of above diff --git a/src/share/vm/runtime/handles.hpp b/src/share/vm/runtime/handles.hpp index 82506bd704958c39453cbb4206b7be6ec5b69def..4a2a90c74c097cf0a0a62a6fb42dce2c3618d405 100644 --- a/src/share/vm/runtime/handles.hpp +++ b/src/share/vm/runtime/handles.hpp @@ -227,7 +227,7 @@ class HandleArea: public Arena { HandleArea* _prev; // link to outer (older) area public: // Constructor - HandleArea(HandleArea* prev) { + HandleArea(HandleArea* prev) : Arena(Chunk::tiny_size) { debug_only(_handle_mark_nesting = 0); debug_only(_no_handle_mark_nesting = 0); _prev = prev;