| /* |
| * Copyright (c) 1998, 2007, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| /* This file houses the common methods for VM ergonomics the platforms |
| * are split into ergo_sparc and ergo_x86, and they could be split more |
| * in the future if required. The following comments are not entirely |
| * true after bifurcation of the platform specific files. |
| */ |
| |
| /* |
| * The following methods (down to ServerClassMachine()) answer |
| * the question about whether a machine is a "server-class" |
| * machine. A server-class machine is loosely defined as one |
| * with 2 or more processors and 2 gigabytes or more physical |
| * memory. The definition of a processor is a physical package, |
| * not a hyperthreaded chip masquerading as a multi-processor. |
| * The definition of memory is also somewhat fuzzy, since x86 |
| * machines seem not to report all the memory in their DIMMs, we |
| * think because of memory mapping of graphics cards, etc. |
| * |
| * This code is somewhat more confused with #ifdef's than we'd |
| * like because this file is used by both Solaris and Linux |
| * platforms, and so needs to be parameterized for SPARC and |
| * i586 hardware. The other Linux platforms (amd64 and ia64) |
| * don't even ask this question, because they only come with |
| * server JVMs. |
| */ |
| |
| #include "ergo.h" |
| |
| /* Dispatch to the platform-specific definition of "server-class" */ |
| jboolean |
| ServerClassMachine(void) { |
| jboolean result; |
| switch(GetErgoPolicy()) { |
| case NEVER_SERVER_CLASS: |
| return JNI_FALSE; |
| case ALWAYS_SERVER_CLASS: |
| return JNI_TRUE; |
| default: |
| result = ServerClassMachineImpl(); |
| JLI_TraceLauncher("ServerClassMachine: returns default value of %s\n", |
| (result == JNI_TRUE ? "true" : "false")); |
| return result; |
| } |
| } |
| |
| |
| /* Compute physical memory by asking the OS */ |
| uint64_t |
| physical_memory(void) { |
| const uint64_t pages = (uint64_t) sysconf(_SC_PHYS_PAGES); |
| const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE); |
| const uint64_t result = pages * page_size; |
| # define UINT64_FORMAT "%" PRIu64 |
| |
| JLI_TraceLauncher("pages: " UINT64_FORMAT |
| " page_size: " UINT64_FORMAT |
| " physical memory: " UINT64_FORMAT " (%.3fGB)\n", |
| pages, page_size, result, result / (double) GB); |
| return result; |
| } |