1 /* 2 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "memory/allocation.hpp" 26 #include "memory/allocation.inline.hpp" 27 #include "runtime/os.hpp" 28 #include "vm_version_ext_zero.hpp" 29 30 // VM_Version_Ext statics 31 int VM_Version_Ext::_no_of_threads = 0; 32 int VM_Version_Ext::_no_of_cores = 0; 33 int VM_Version_Ext::_no_of_sockets = 0; 34 bool VM_Version_Ext::_initialized = false; 35 char VM_Version_Ext::_cpu_name[CPU_TYPE_DESC_BUF_SIZE] = {0}; 36 37 void VM_Version_Ext::initialize_cpu_information(void) { 38 // do nothing if cpu info has been initialized 39 if (_initialized) { 40 return; 41 } 42 43 int core_id = -1; 44 int chip_id = -1; 45 int len = 0; 46 char* src_string = NULL; 47 48 _no_of_cores = os::processor_count(); 49 _no_of_threads = _no_of_cores; 50 _no_of_sockets = _no_of_cores; 51 snprintf(_cpu_name, CPU_TYPE_DESC_BUF_SIZE - 1, "Zero VM"); 52 _initialized = true; 53 } 54 55 int VM_Version_Ext::number_of_threads(void) { 56 initialize_cpu_information(); 57 return _no_of_threads; 58 } 59 60 int VM_Version_Ext::number_of_cores(void) { 61 initialize_cpu_information(); 62 return _no_of_cores; 63 } 64 65 int VM_Version_Ext::number_of_sockets(void) { 66 initialize_cpu_information(); 67 return _no_of_sockets; 68 } 69 70 const char* VM_Version_Ext::cpu_name(void) { 71 initialize_cpu_information(); 72 char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_TYPE_DESC_BUF_SIZE, mtTracing); 73 if (NULL == tmp) { 74 return NULL; 75 } 76 strncpy(tmp, _cpu_name, CPU_TYPE_DESC_BUF_SIZE); 77 return tmp; 78 } 79 80 const char* VM_Version_Ext::cpu_description(void) { 81 return ""; 82 }