1 /* 2 * Copyright (c) 2002, 2005, 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 "incls/_precompiled.incl" 26 # include "incls/_gcUtil.cpp.incl" 27 28 // Catch-all file for utility classes 29 30 float AdaptiveWeightedAverage::compute_adaptive_average(float new_sample, 31 float average) { 32 // We smooth the samples by not using weight() directly until we've 33 // had enough data to make it meaningful. We'd like the first weight 34 // used to be 1, the second to be 1/2, etc until we have 100/weight 35 // samples. 36 unsigned count_weight = 100/count(); 37 unsigned adaptive_weight = (MAX2(weight(), count_weight)); 38 39 float new_avg = exp_avg(average, new_sample, adaptive_weight); 40 41 return new_avg; 42 } 43 44 void AdaptiveWeightedAverage::sample(float new_sample) { 45 increment_count(); 46 assert(count() != 0, | 1 /* 2 * Copyright (c) 2002, 2010, 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 "precompiled.hpp" 26 #include "gc_implementation/shared/gcUtil.hpp" 27 28 // Catch-all file for utility classes 29 30 float AdaptiveWeightedAverage::compute_adaptive_average(float new_sample, 31 float average) { 32 // We smooth the samples by not using weight() directly until we've 33 // had enough data to make it meaningful. We'd like the first weight 34 // used to be 1, the second to be 1/2, etc until we have 100/weight 35 // samples. 36 unsigned count_weight = 100/count(); 37 unsigned adaptive_weight = (MAX2(weight(), count_weight)); 38 39 float new_avg = exp_avg(average, new_sample, adaptive_weight); 40 41 return new_avg; 42 } 43 44 void AdaptiveWeightedAverage::sample(float new_sample) { 45 increment_count(); 46 assert(count() != 0, |