1 /* 2 * Copyright (c) 2015, 2017, 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 #ifndef SHARE_GC_Z_ZWORKERS_HPP 25 #define SHARE_GC_Z_ZWORKERS_HPP 26 27 #include "gc/shared/workgroup.hpp" 28 #include "memory/allocation.hpp" 29 30 class ZTask; 31 32 class ZWorkers { 33 private: 34 bool _boost; 35 WorkGang _workers; 36 37 static uint calculate_ncpus(double share_in_percent); 38 39 void run(ZTask* task, uint nworkers); 40 41 public: 42 static uint calculate_nparallel(); 43 static uint calculate_nconcurrent(); 44 45 ZWorkers(); 46 47 uint nparallel() const; 48 uint nparallel_no_boost() const; 49 uint nconcurrent() const; 50 uint nconcurrent_no_boost() const; 51 uint nworkers() const; 52 53 void set_boost(bool boost); 54 55 void run_parallel(ZTask* task); 56 void run_concurrent(ZTask* task); 57 58 void threads_do(ThreadClosure* tc) const; 59 void print_threads_on(outputStream* st) const; 60 }; 61 62 #endif // SHARE_GC_Z_ZWORKERS_HPP