Mercurial > hg > graal-compiler
view src/share/vm/shark/sharkCacheDecache.cpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | f95d63e2154a |
children | 597bc897257d da91efe96a93 |
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/* * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2008, 2009 Red Hat, Inc. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "ci/ciMethod.hpp" #include "code/debugInfoRec.hpp" #include "shark/llvmValue.hpp" #include "shark/sharkBuilder.hpp" #include "shark/sharkCacheDecache.hpp" #include "shark/sharkFunction.hpp" #include "shark/sharkState.hpp" using namespace llvm; void SharkDecacher::start_frame() { // Start recording the debug information _pc_offset = code_buffer()->create_unique_offset(); _oopmap = new OopMap( oopmap_slot_munge(stack()->oopmap_frame_size()), oopmap_slot_munge(arg_size())); debug_info()->add_safepoint(pc_offset(), oopmap()); } void SharkDecacher::start_stack(int stack_depth) { // Create the array we'll record our stack slots in _exparray = new GrowableArray<ScopeValue*>(stack_depth); // Set the stack pointer stack()->CreateStoreStackPointer( builder()->CreatePtrToInt( stack()->slot_addr( stack()->stack_slots_offset() + max_stack() - stack_depth), SharkType::intptr_type())); } void SharkDecacher::process_stack_slot(int index, SharkValue** addr, int offset) { SharkValue *value = *addr; // Write the value to the frame if necessary if (stack_slot_needs_write(index, value)) { write_value_to_frame( SharkType::to_stackType(value->basic_type()), value->generic_value(), adjusted_offset(value, offset)); } // Record the value in the oopmap if necessary if (stack_slot_needs_oopmap(index, value)) { oopmap()->set_oop(slot2reg(offset)); } // Record the value in the debuginfo if necessary if (stack_slot_needs_debuginfo(index, value)) { exparray()->append(slot2lv(offset, stack_location_type(index, addr))); } } void SharkDecacher::start_monitors(int num_monitors) { // Create the array we'll record our monitors in _monarray = new GrowableArray<MonitorValue*>(num_monitors); } void SharkDecacher::process_monitor(int index, int box_offset, int obj_offset) { oopmap()->set_oop(slot2reg(obj_offset)); monarray()->append(new MonitorValue( slot2lv (obj_offset, Location::oop), slot2loc(box_offset, Location::normal))); } void SharkDecacher::process_oop_tmp_slot(Value** value, int offset) { // Decache the temporary oop slot if (*value) { write_value_to_frame( SharkType::oop_type(), *value, offset); oopmap()->set_oop(slot2reg(offset)); } } void SharkDecacher::process_method_slot(Value** value, int offset) { // Decache the method pointer write_value_to_frame( SharkType::methodOop_type(), *value, offset); oopmap()->set_oop(slot2reg(offset)); } void SharkDecacher::process_pc_slot(int offset) { // Record the PC builder()->CreateStore( builder()->code_buffer_address(pc_offset()), stack()->slot_addr(offset)); } void SharkDecacher::start_locals() { // Create the array we'll record our local variables in _locarray = new GrowableArray<ScopeValue*>(max_locals());} void SharkDecacher::process_local_slot(int index, SharkValue** addr, int offset) { SharkValue *value = *addr; // Write the value to the frame if necessary if (local_slot_needs_write(index, value)) { write_value_to_frame( SharkType::to_stackType(value->basic_type()), value->generic_value(), adjusted_offset(value, offset)); } // Record the value in the oopmap if necessary if (local_slot_needs_oopmap(index, value)) { oopmap()->set_oop(slot2reg(offset)); } // Record the value in the debuginfo if necessary if (local_slot_needs_debuginfo(index, value)) { locarray()->append(slot2lv(offset, local_location_type(index, addr))); } } void SharkDecacher::end_frame() { // Record the scope debug_info()->describe_scope( pc_offset(), target(), bci(), true, false, false, debug_info()->create_scope_values(locarray()), debug_info()->create_scope_values(exparray()), debug_info()->create_monitor_values(monarray())); // Finish recording the debug information debug_info()->end_safepoint(pc_offset()); } void SharkCacher::process_stack_slot(int index, SharkValue** addr, int offset) { SharkValue *value = *addr; // Read the value from the frame if necessary if (stack_slot_needs_read(index, value)) { *addr = SharkValue::create_generic( value->type(), read_value_from_frame( SharkType::to_stackType(value->basic_type()), adjusted_offset(value, offset)), value->zero_checked()); } } void SharkOSREntryCacher::process_monitor(int index, int box_offset, int obj_offset) { // Copy the monitor from the OSR buffer to the frame int src_offset = max_locals() + index * 2; builder()->CreateStore( builder()->CreateLoad( CreateAddressOfOSRBufEntry(src_offset, SharkType::intptr_type())), stack()->slot_addr(box_offset, SharkType::intptr_type())); builder()->CreateStore( builder()->CreateLoad( CreateAddressOfOSRBufEntry(src_offset + 1, SharkType::oop_type())), stack()->slot_addr(obj_offset, SharkType::oop_type())); } void SharkCacher::process_oop_tmp_slot(Value** value, int offset) { // Cache the temporary oop if (*value) *value = read_value_from_frame(SharkType::oop_type(), offset); } void SharkCacher::process_method_slot(Value** value, int offset) { // Cache the method pointer *value = read_value_from_frame(SharkType::methodOop_type(), offset); } void SharkFunctionEntryCacher::process_method_slot(Value** value, int offset) { // "Cache" the method pointer *value = method(); } void SharkCacher::process_local_slot(int index, SharkValue** addr, int offset) { SharkValue *value = *addr; // Read the value from the frame if necessary if (local_slot_needs_read(index, value)) { *addr = SharkValue::create_generic( value->type(), read_value_from_frame( SharkType::to_stackType(value->basic_type()), adjusted_offset(value, offset)), value->zero_checked()); } } Value* SharkOSREntryCacher::CreateAddressOfOSRBufEntry(int offset, const Type* type) { Value *result = builder()->CreateStructGEP(osr_buf(), offset); if (type != SharkType::intptr_type()) result = builder()->CreateBitCast(result, PointerType::getUnqual(type)); return result; } void SharkOSREntryCacher::process_local_slot(int index, SharkValue** addr, int offset) { SharkValue *value = *addr; // Read the value from the OSR buffer if necessary if (local_slot_needs_read(index, value)) { *addr = SharkValue::create_generic( value->type(), builder()->CreateLoad( CreateAddressOfOSRBufEntry( adjusted_offset(value, max_locals() - 1 - index), SharkType::to_stackType(value->basic_type()))), value->zero_checked()); } } void SharkDecacher::write_value_to_frame(const Type* type, Value* value, int offset) { builder()->CreateStore(value, stack()->slot_addr(offset, type)); } Value* SharkCacher::read_value_from_frame(const Type* type, int offset) { return builder()->CreateLoad(stack()->slot_addr(offset, type)); }