void CodeCache::initialize_heaps() { bool non_nmethod_set = FLAG_IS_CMDLINE(NonNMethodCodeHeapSize); bool profiled_set = FLAG_IS_CMDLINE(ProfiledCodeHeapSize); bool non_profiled_set = FLAG_IS_CMDLINE(NonProfiledCodeHeapSize); size_t min_size = os::vm_page_size(); size_t cache_size = ReservedCodeCacheSize; size_t non_nmethod_size = NonNMethodCodeHeapSize; size_t profiled_size = ProfiledCodeHeapSize; size_t non_profiled_size = NonProfiledCodeHeapSize; // Check if total size set via command line flags exceeds the reserved size check_heap_sizes((non_nmethod_set ? non_nmethod_size : min_size), (profiled_set ? profiled_size : min_size), (non_profiled_set ? non_profiled_size : min_size), cache_size, non_nmethod_set && profiled_set && non_profiled_set); // Determine size of compiler buffers size_t code_buffers_size = 0; #ifdef COMPILER1 // C1 temporary code buffers (see Compiler::init_buffer_blob()) const int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); code_buffers_size += c1_count * Compiler::code_buffer_size(); #endif #ifdef COMPILER2 // C2 scratch buffers (see Compile::init_scratch_buffer_blob()) const int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); // Initial size of constant table (this may be increased if a compiled method needs more space) code_buffers_size += c2_count * C2Compiler::initial_code_buffer_size(); #endif // Increase default non_nmethod_size to account for compiler buffers if (!non_nmethod_set) { non_nmethod_size += code_buffers_size; } // Calculate default CodeHeap sizes if not set by user if (!non_nmethod_set && !profiled_set && !non_profiled_set) { // Check if we have enough space for the non-nmethod code heap if (cache_size > non_nmethod_size) { // Use the default value for non_nmethod_size and one half of the // remaining size for non-profiled and one half for profiled methods size_t remaining_size = cache_size - non_nmethod_size; profiled_size = remaining_size / 2; non_profiled_size = remaining_size - profiled_size; } else { // Use all space for the non-nmethod heap and set other heaps to minimal size non_nmethod_size = cache_size - 2 * min_size; profiled_size = min_size; non_profiled_size = min_size; } } else if (!non_nmethod_set || !profiled_set || !non_profiled_set) { // The user explicitly set some code heap sizes. Increase or decrease the (default) // sizes of the other code heaps accordingly. First adapt non-profiled and profiled // code heap sizes and then only change non-nmethod code heap size if still necessary. intx diff_size = cache_size - (non_nmethod_size + profiled_size + non_profiled_size); if (non_profiled_set) { if (!profiled_set) { // Adapt size of profiled code heap if (diff_size < 0 && ((intx)profiled_size + diff_size) <= 0) { // Not enough space available, set to minimum size diff_size += profiled_size - min_size; profiled_size = min_size; } else { profiled_size += diff_size; diff_size = 0; } } } else if (profiled_set) { // Adapt size of non-profiled code heap if (diff_size < 0 && ((intx)non_profiled_size + diff_size) <= 0) { // Not enough space available, set to minimum size diff_size += non_profiled_size - min_size; non_profiled_size = min_size; } else { non_profiled_size += diff_size; diff_size = 0; } } else if (non_nmethod_set) { // Distribute remaining size between profiled and non-profiled code heaps diff_size = cache_size - non_nmethod_size; profiled_size = diff_size / 2; non_profiled_size = diff_size - profiled_size; diff_size = 0; } if (diff_size != 0) { // Use non-nmethod code heap for remaining space requirements assert(!non_nmethod_set && ((intx)non_nmethod_size + diff_size) > 0, "sanity"); non_nmethod_size += diff_size; } } // We do not need the profiled CodeHeap, use all space for the non-profiled CodeHeap if(!heap_available(CodeBlobType::MethodProfiled)) { non_profiled_size += profiled_size; profiled_size = 0; } // We do not need the non-profiled CodeHeap, use all space for the non-nmethod CodeHeap if(!heap_available(CodeBlobType::MethodNonProfiled)) { non_nmethod_size += non_profiled_size; non_profiled_size = 0; } // Make sure we have enough space for VM internal code uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3); if (non_nmethod_size < (min_code_cache_size + code_buffers_size)) { vm_exit_during_initialization(err_msg( "Not enough space in non-nmethod code heap to run VM: %zuK < %zuK", non_nmethod_size/K, (min_code_cache_size + code_buffers_size)/K)); } // Verify sizes and update flag values assert(non_profiled_size + profiled_size + non_nmethod_size == cache_size, "Invalid code heap sizes"); FLAG_SET_ERGO(uintx, NonNMethodCodeHeapSize, non_nmethod_size); FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, profiled_size); FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, non_profiled_size); // Align CodeHeaps size_t alignment = heap_alignment(); non_nmethod_size = align_size_up(non_nmethod_size, alignment); profiled_size = align_size_down(profiled_size, alignment); // Reserve one continuous chunk of memory for CodeHeaps and split it into // parts for the individual heaps. The memory layout looks like this: // ---------- high ----------- // Non-profiled nmethods // Profiled nmethods // Non-nmethods // ---------- low ------------ ReservedCodeSpace rs = reserve_heap_memory(cache_size); ReservedSpace non_method_space = rs.first_part(non_nmethod_size); ReservedSpace rest = rs.last_part(non_nmethod_size); ReservedSpace profiled_space = rest.first_part(profiled_size); ReservedSpace non_profiled_space = rest.last_part(profiled_size); // Non-nmethods (stubs, adapters, ...) add_heap(non_method_space, "CodeHeap 'non-nmethods'", CodeBlobType::NonNMethod); // Tier 2 and tier 3 (profiled) methods add_heap(profiled_space, "CodeHeap 'profiled nmethods'", CodeBlobType::MethodProfiled); // Tier 1 and tier 4 (non-profiled) methods and native methods add_heap(non_profiled_space, "CodeHeap 'non-profiled nmethods'", CodeBlobType::MethodNonProfiled); }
CompactingPermGenGen::CompactingPermGenGen(ReservedSpace rs, ReservedSpace shared_rs, size_t initial_byte_size, int level, GenRemSet* remset, ContiguousSpace* space, PermanentGenerationSpec* spec_) : OneContigSpaceCardGeneration(rs, initial_byte_size, MinPermHeapExpansion, level, remset, space) { set_spec(spec_); if (!UseSharedSpaces && !DumpSharedSpaces) { spec()->disable_sharing(); } // Break virtual space into address ranges for all spaces. if (spec()->enable_shared_spaces()) { shared_end = (HeapWord*)(shared_rs.base() + shared_rs.size()); misccode_end = shared_end; misccode_bottom = misccode_end - heap_word_size(spec()->misc_code_size()); miscdata_end = misccode_bottom; miscdata_bottom = miscdata_end - heap_word_size(spec()->misc_data_size()); readwrite_end = miscdata_bottom; readwrite_bottom = readwrite_end - heap_word_size(spec()->read_write_size()); readonly_end = readwrite_bottom; readonly_bottom = readonly_end - heap_word_size(spec()->read_only_size()); shared_bottom = readonly_bottom; unshared_end = shared_bottom; assert((char*)shared_bottom == shared_rs.base(), "shared space mismatch"); } else { shared_end = (HeapWord*)(rs.base() + rs.size()); misccode_end = shared_end; misccode_bottom = shared_end; miscdata_end = shared_end; miscdata_bottom = shared_end; readwrite_end = shared_end; readwrite_bottom = shared_end; readonly_end = shared_end; readonly_bottom = shared_end; shared_bottom = shared_end; unshared_end = shared_bottom; } unshared_bottom = (HeapWord*) rs.base(); // Verify shared and unshared spaces adjacent. assert((char*)shared_bottom == rs.base()+rs.size(), "shared space mismatch"); assert(unshared_end > unshared_bottom, "shared space mismatch"); // Split reserved memory into pieces. ReservedSpace ro_rs = shared_rs.first_part(spec()->read_only_size(), UseSharedSpaces); ReservedSpace tmp_rs1 = shared_rs.last_part(spec()->read_only_size()); ReservedSpace rw_rs = tmp_rs1.first_part(spec()->read_write_size(), UseSharedSpaces); ReservedSpace tmp_rs2 = tmp_rs1.last_part(spec()->read_write_size()); ReservedSpace md_rs = tmp_rs2.first_part(spec()->misc_data_size(), UseSharedSpaces); ReservedSpace mc_rs = tmp_rs2.last_part(spec()->misc_data_size()); _shared_space_size = spec()->read_only_size() + spec()->read_write_size() + spec()->misc_data_size() + spec()->misc_code_size(); // Allocate the unshared (default) space. _the_space = new ContigPermSpace(_bts, MemRegion(unshared_bottom, heap_word_size(initial_byte_size))); if (_the_space == NULL) vm_exit_during_initialization("Could not allocate an unshared" " CompactingPermGen Space"); // Allocate shared spaces if (spec()->enable_shared_spaces()) { // If mapping a shared file, the space is not committed, don't // mangle. NOT_PRODUCT(bool old_ZapUnusedHeapArea = ZapUnusedHeapArea;)
void CodeCache::initialize_heaps() { // Determine size of compiler buffers size_t code_buffers_size = 0; #ifdef COMPILER1 // C1 temporary code buffers (see Compiler::init_buffer_blob()) const int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); code_buffers_size += c1_count * Compiler::code_buffer_size(); #endif #ifdef COMPILER2 // C2 scratch buffers (see Compile::init_scratch_buffer_blob()) const int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); // Initial size of constant table (this may be increased if a compiled method needs more space) code_buffers_size += c2_count * C2Compiler::initial_code_buffer_size(); #endif // Calculate default CodeHeap sizes if not set by user if (!FLAG_IS_CMDLINE(NonNMethodCodeHeapSize) && !FLAG_IS_CMDLINE(ProfiledCodeHeapSize) && !FLAG_IS_CMDLINE(NonProfiledCodeHeapSize)) { // Increase default NonNMethodCodeHeapSize to account for compiler buffers FLAG_SET_ERGO(uintx, NonNMethodCodeHeapSize, NonNMethodCodeHeapSize + code_buffers_size); // Check if we have enough space for the non-nmethod code heap if (ReservedCodeCacheSize > NonNMethodCodeHeapSize) { // Use the default value for NonNMethodCodeHeapSize and one half of the // remaining size for non-profiled methods and one half for profiled methods size_t remaining_size = ReservedCodeCacheSize - NonNMethodCodeHeapSize; size_t profiled_size = remaining_size / 2; size_t non_profiled_size = remaining_size - profiled_size; FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, profiled_size); FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, non_profiled_size); } else { // Use all space for the non-nmethod heap and set other heaps to minimal size FLAG_SET_ERGO(uintx, NonNMethodCodeHeapSize, ReservedCodeCacheSize - os::vm_page_size() * 2); FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, os::vm_page_size()); FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, os::vm_page_size()); } } // We do not need the profiled CodeHeap, use all space for the non-profiled CodeHeap if(!heap_available(CodeBlobType::MethodProfiled)) { FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize + ProfiledCodeHeapSize); FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, 0); } // We do not need the non-profiled CodeHeap, use all space for the non-nmethod CodeHeap if(!heap_available(CodeBlobType::MethodNonProfiled)) { FLAG_SET_ERGO(uintx, NonNMethodCodeHeapSize, NonNMethodCodeHeapSize + NonProfiledCodeHeapSize); FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, 0); } // Make sure we have enough space for VM internal code uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3); if (NonNMethodCodeHeapSize < (min_code_cache_size + code_buffers_size)) { vm_exit_during_initialization("Not enough space in non-nmethod code heap to run VM."); } guarantee(NonProfiledCodeHeapSize + ProfiledCodeHeapSize + NonNMethodCodeHeapSize <= ReservedCodeCacheSize, "Size check"); // Align CodeHeaps size_t alignment = heap_alignment(); size_t non_method_size = align_size_up(NonNMethodCodeHeapSize, alignment); size_t profiled_size = align_size_down(ProfiledCodeHeapSize, alignment); // Reserve one continuous chunk of memory for CodeHeaps and split it into // parts for the individual heaps. The memory layout looks like this: // ---------- high ----------- // Non-profiled nmethods // Profiled nmethods // Non-nmethods // ---------- low ------------ ReservedCodeSpace rs = reserve_heap_memory(ReservedCodeCacheSize); ReservedSpace non_method_space = rs.first_part(non_method_size); ReservedSpace rest = rs.last_part(non_method_size); ReservedSpace profiled_space = rest.first_part(profiled_size); ReservedSpace non_profiled_space = rest.last_part(profiled_size); // Non-nmethods (stubs, adapters, ...) add_heap(non_method_space, "CodeHeap 'non-nmethods'", CodeBlobType::NonNMethod); // Tier 2 and tier 3 (profiled) methods add_heap(profiled_space, "CodeHeap 'profiled nmethods'", CodeBlobType::MethodProfiled); // Tier 1 and tier 4 (non-profiled) methods and native methods add_heap(non_profiled_space, "CodeHeap 'non-profiled nmethods'", CodeBlobType::MethodNonProfiled); }