Mercurial > hg > truffle
view src/os_cpu/linux_sparc/vm/vm_version_linux_sparc.cpp @ 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 | a0ea36509b7b |
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/* * Copyright (c) 2006, 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. * */ #include "precompiled.hpp" #include "runtime/os.hpp" #include "vm_version_sparc.hpp" static bool detect_niagara() { char cpu[128]; bool rv = false; FILE* fp = fopen("/proc/cpuinfo", "r"); if (fp == NULL) { return rv; } while (!feof(fp)) { if (fscanf(fp, "cpu\t\t: %100[^\n]", &cpu) == 1) { if (strstr(cpu, "Niagara") != NULL) { rv = true; } break; } } fclose(fp); return rv; } int VM_Version::platform_features(int features) { // Default to generic v9 features = generic_v9_m; if (detect_niagara()) { NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Detected Linux on Niagara");) features = niagara1_m; } return features; }