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test/native/gc/g1/test_g1Predictions.cpp

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rev 11782 : 8164028: Convert TestPredictions_test to GTest
Reviewed-by: duke

*** 1,7 **** /* ! * Copyright (c) 2015, 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. --- 1,7 ---- /* ! * Copyright (c) 2016, 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.
*** 22,98 **** * */ #include "precompiled.hpp" #include "gc/g1/g1Predictions.hpp" ! #ifndef PRODUCT ! void G1Predictions::test() { ! double const epsilon = 1e-6; ! { ! // Some basic formula tests with confidence = 0.0 G1Predictions predictor(0.0); TruncatedSeq s; double p0 = predictor.get_new_prediction(&s); ! assert(p0 < epsilon, "Initial prediction of empty sequence must be 0.0 but is %f", p0); s.add(5.0); double p1 = predictor.get_new_prediction(&s); ! assert(fabs(p1 - 5.0) < epsilon, "Prediction should be 5.0 but is %f", p1); for (int i = 0; i < 40; i++) { s.add(5.0); } double p2 = predictor.get_new_prediction(&s); ! assert(fabs(p2 - 5.0) < epsilon, "Prediction should be 5.0 but is %f", p1); ! } ! { ! // The following tests checks that the initial predictions are based on the ! // average of the sequence and not on the stddev (which is 0). G1Predictions predictor(0.5); TruncatedSeq s; s.add(1.0); double p1 = predictor.get_new_prediction(&s); ! assert(p1 > 1.0, "First prediction must be larger than average, but avg is %f and prediction %f", s.davg(), p1); s.add(1.0); double p2 = predictor.get_new_prediction(&s); ! assert(p2 < p1, "First prediction must be larger than second, but they are %f %f", p1, p2); s.add(1.0); double p3 = predictor.get_new_prediction(&s); ! assert(p3 < p2, "Second prediction must be larger than third, but they are %f %f", p2, p3); s.add(1.0); s.add(1.0); // Five elements are now in the sequence. ! double p5 = predictor.get_new_prediction(&s); ! assert(p5 < p3, "Fifth prediction must be smaller than third, but they are %f %f", p3, p5); ! assert(fabs(p5 - 1.0) < epsilon, "Prediction must be 1.0+epsilon, but is %f", p5); ! } ! { ! // The following tests checks that initially prediction based on the average is ! // used, that gets overridden by the stddev prediction at the end. G1Predictions predictor(0.5); TruncatedSeq s; s.add(0.5); double p1 = predictor.get_new_prediction(&s); ! assert(p1 > 0.5, "First prediction must be larger than average, but avg is %f and prediction %f", s.davg(), p1); s.add(0.2); double p2 = predictor.get_new_prediction(&s); ! assert(p2 < p1, "First prediction must be larger than second, but they are %f %f", p1, p2); s.add(0.5); double p3 = predictor.get_new_prediction(&s); ! assert(p3 < p2, "Second prediction must be larger than third, but they are %f %f", p2, p3); s.add(0.2); s.add(2.0); ! double p5 = predictor.get_new_prediction(&s); ! assert(p5 > p3, "Fifth prediction must be bigger than third, but they are %f %f", p3, p5); ! } } - - void TestPredictions_test() { - G1Predictions::test(); - } - - #endif --- 22,98 ---- * */ #include "precompiled.hpp" #include "gc/g1/g1Predictions.hpp" + #include "unittest.hpp" ! static const double epsilon = 1e-6; ! // Some basic formula tests with confidence = 0.0 ! TEST_VM(G1Predictions, basic_predictions) { G1Predictions predictor(0.0); TruncatedSeq s; double p0 = predictor.get_new_prediction(&s); ! ASSERT_LT(p0, epsilon) << "Initial prediction of empty sequence must be 0.0"; s.add(5.0); double p1 = predictor.get_new_prediction(&s); ! ASSERT_NEAR(p1, 5.0, epsilon); ! for (int i = 0; i < 40; i++) { s.add(5.0); } double p2 = predictor.get_new_prediction(&s); ! ASSERT_NEAR(p2, 5.0, epsilon); ! } ! // The following tests checks that the initial predictions are based on ! // the average of the sequence and not on the stddev (which is 0). ! TEST_VM(G1Predictions, average_not_stdev_predictions) { G1Predictions predictor(0.5); TruncatedSeq s; s.add(1.0); double p1 = predictor.get_new_prediction(&s); ! ASSERT_GT(p1, s.davg()) << "First prediction must be greater than average"; ! s.add(1.0); double p2 = predictor.get_new_prediction(&s); ! ASSERT_GT(p1, p2) << "First prediction must be greater than second"; ! s.add(1.0); double p3 = predictor.get_new_prediction(&s); ! ASSERT_GT(p2, p3) << "Second prediction must be greater than third"; ! s.add(1.0); s.add(1.0); // Five elements are now in the sequence. ! double p4 = predictor.get_new_prediction(&s); ! ASSERT_LT(p4, p3) << "Fourth prediction must be smaller than third"; ! ASSERT_NEAR(p4, 1.0, epsilon); ! } ! // The following tests checks that initially prediction based on ! // the average is used, that gets overridden by the stddev prediction at ! // the end. ! TEST_VM(G1Predictions, average_stdev_predictions) { G1Predictions predictor(0.5); TruncatedSeq s; s.add(0.5); double p1 = predictor.get_new_prediction(&s); ! ASSERT_GT(p1, s.davg()) << "First prediction must be greater than average"; ! s.add(0.2); double p2 = predictor.get_new_prediction(&s); ! ASSERT_GT(p1, p2) << "First prediction must be greater than second"; ! s.add(0.5); double p3 = predictor.get_new_prediction(&s); ! ASSERT_GT(p2, p3) << "Second prediction must be greater than third"; ! s.add(0.2); s.add(2.0); ! double p4 = predictor.get_new_prediction(&s); ! ASSERT_GT(p4, p3) << "Fourth prediction must be greater than third"; }
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