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view src/os_cpu/linux_x86/vm/threadLS_linux_x86.hpp @ 2433:abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
7023151: G1: refactor the code that operates on _cur_alloc_region to be re-used for allocs by the GC threads
7018286: G1: humongous allocation attempts should take the GC locker into account
Summary: First, this change replaces the asymmetric locking scheme in the G1 slow alloc path by a summetric one. Second, it factors out the code that operates on _cur_alloc_region so that it can be re-used for allocations by the GC threads in the future.
Reviewed-by: stefank, brutisso, johnc
author | tonyp |
---|---|
date | Wed, 30 Mar 2011 10:26:59 -0400 |
parents | f95d63e2154a |
children | 65dba8692db7 |
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/* * Copyright (c) 1999, 2010, 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 * 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. * */ #ifndef OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP #define OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP // Processor dependent parts of ThreadLocalStorage #ifndef AMD64 // map stack pointer to thread pointer - see notes in threadLS_linux_x86.cpp #define SP_BITLENGTH 32 #define PAGE_SHIFT 12 #define PAGE_SIZE (1UL << PAGE_SHIFT) static Thread* _sp_map[1UL << (SP_BITLENGTH - PAGE_SHIFT)]; #endif // !AMD64 public: #ifndef AMD64 static Thread** sp_map_addr() { return _sp_map; } #endif // !AMD64 static Thread* thread() { #ifdef AMD64 return (Thread*) os::thread_local_storage_at(thread_index()); #else uintptr_t sp; __asm__ volatile ("movl %%esp, %0" : "=r" (sp)); return _sp_map[sp >> PAGE_SHIFT]; #endif // AMD64 } #endif // OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP