| /* |
| * Copyright (c) 2013, 2018, 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 "jvm.h" |
| #include "memory/allocation.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "vm_version_ext_sparc.hpp" |
| |
| // VM_Version_Ext statics |
| int VM_Version_Ext::_no_of_threads = 0; |
| int VM_Version_Ext::_no_of_cores = 0; |
| int VM_Version_Ext::_no_of_sockets = 0; |
| kid_t VM_Version_Ext::_kcid = -1; |
| char VM_Version_Ext::_cpu_name[CPU_TYPE_DESC_BUF_SIZE] = {0}; |
| char VM_Version_Ext::_cpu_desc[CPU_DETAILED_DESC_BUF_SIZE] = {0}; |
| |
| // get cpu information. It takes into account if the kstat chain id |
| // has been changed and update the info if necessary. |
| bool VM_Version_Ext::initialize_cpu_information(void) { |
| |
| int core_id = -1; |
| int chip_id = -1; |
| int len = 0; |
| char* src_string = NULL; |
| kstat_ctl_t* kc = kstat_open(); |
| if (!kc) { |
| return false; |
| } |
| |
| // check if kstat chain has been updated |
| kid_t kcid = kstat_chain_update(kc); |
| if (kcid == -1) { |
| kstat_close(kc); |
| return false; |
| } |
| |
| bool updated = ((kcid > 0) && (kcid != _kcid)) || |
| ((kcid == 0) && (_kcid == -1)); |
| if (!updated) { |
| kstat_close(kc); |
| return true; |
| } |
| |
| // update the cached _kcid |
| _kcid = kcid; |
| |
| // find the number of online processors |
| // for modern processsors, it is also known as the |
| // hardware threads. |
| _no_of_threads = sysconf(_SC_NPROCESSORS_ONLN); |
| |
| if (_no_of_threads <= 0 ) { |
| kstat_close(kc); |
| return false; |
| } |
| |
| _no_of_cores = 0; |
| _no_of_sockets = 0; |
| |
| // loop through the kstat chain |
| kstat_t* ksp = NULL; |
| for (ksp = kc->kc_chain; ksp != NULL; ksp = ksp->ks_next) { |
| // only interested in "cpu_info" |
| if (strcmp(ksp->ks_module, (char*)CPU_INFO) == 0) { |
| if (kstat_read(kc, ksp, NULL) == -1) { |
| kstat_close(kc); |
| return false; |
| } |
| if (ksp->ks_data != NULL) { |
| kstat_named_t* knm = (kstat_named_t *)ksp->ks_data; |
| // loop through the number of fields in each record |
| for (int i = 0; i < ksp->ks_ndata; i++) { |
| // set cpu type if it hasn't been already set |
| if ((strcmp((const char*)&(knm[i].name), CPU_TYPE) == 0) && |
| (_cpu_name[0] == '\0')) { |
| if (knm[i].data_type == KSTAT_DATA_STRING) { |
| src_string = (char*)KSTAT_NAMED_STR_PTR(&knm[i]); |
| } else { |
| src_string = (char*)&(knm[i].value.c[0]); |
| } |
| len = strlen(src_string); |
| if (len < CPU_TYPE_DESC_BUF_SIZE) { |
| jio_snprintf(_cpu_name, CPU_TYPE_DESC_BUF_SIZE, |
| "%s", src_string); |
| } |
| } |
| |
| // set cpu description if it hasn't been already set |
| if ((strcmp((const char*)&(knm[i].name), CPU_DESCRIPTION) == 0) && |
| (_cpu_desc[0] == '\0')) { |
| if (knm[i].data_type == KSTAT_DATA_STRING) { |
| src_string = (char*)KSTAT_NAMED_STR_PTR(&knm[i]); |
| } else { |
| src_string = (char*)&(knm[i].value.c[0]); |
| } |
| len = strlen(src_string); |
| if (len < CPU_DETAILED_DESC_BUF_SIZE) { |
| jio_snprintf(_cpu_desc, CPU_DETAILED_DESC_BUF_SIZE, |
| "%s", src_string); |
| } |
| } |
| |
| // count the number of sockets based on the chip id |
| if (strcmp((const char*)&(knm[i].name), CHIP_ID) == 0) { |
| if (chip_id != knm[i].value.l) { |
| chip_id = knm[i].value.l; |
| _no_of_sockets++; |
| } |
| } |
| |
| // count the number of cores based on the core id |
| if (strcmp((const char*)&(knm[i].name), CORE_ID) == 0) { |
| if (core_id != knm[i].value.l) { |
| core_id = knm[i].value.l; |
| _no_of_cores++; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| kstat_close(kc); |
| return true; |
| } |
| |
| int VM_Version_Ext::number_of_threads(void) { |
| initialize_cpu_information(); |
| return _no_of_threads; |
| } |
| |
| int VM_Version_Ext::number_of_cores(void) { |
| initialize_cpu_information(); |
| return _no_of_cores; |
| } |
| |
| int VM_Version_Ext::number_of_sockets(void) { |
| initialize_cpu_information(); |
| return _no_of_sockets; |
| } |
| |
| const char* VM_Version_Ext::cpu_name(void) { |
| if (!initialize_cpu_information()) { |
| return NULL; |
| } |
| char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_TYPE_DESC_BUF_SIZE, mtTracing); |
| if (NULL == tmp) { |
| return NULL; |
| } |
| strncpy(tmp, _cpu_name, CPU_TYPE_DESC_BUF_SIZE); |
| return tmp; |
| } |
| |
| const char* VM_Version_Ext::cpu_description(void) { |
| if (!initialize_cpu_information()) { |
| return NULL; |
| } |
| char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_DETAILED_DESC_BUF_SIZE, mtTracing); |
| if (NULL == tmp) { |
| return NULL; |
| } |
| strncpy(tmp, _cpu_desc, CPU_DETAILED_DESC_BUF_SIZE); |
| return tmp; |
| } |