106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Copyright (C) 2017 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define BOOST_TEST_MODULE core
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#include <boost/test/unit_test.hpp>
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#include "utils/streaming_histogram.hh"
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#include <seastar/core/print.hh>
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#include <map>
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#include <cmath>
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#include "disk-error-handler.hh"
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thread_local disk_error_signal_type commit_error;
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thread_local disk_error_signal_type general_disk_error;
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BOOST_AUTO_TEST_CASE(basic_streaming_histogram_test) {
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utils::streaming_histogram hist(5);
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long samples[] = {23, 19, 10, 16, 36, 2, 9, 32, 30, 45};
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// add 7 points to histogram of 5 bins
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for (int i = 0; i < 7; i++) {
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hist.update(samples[i]);
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}
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// should end up (2,1),(9.5,2),(17.5,2),(23,1),(36,1)
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std::map<double, uint64_t> expected1;
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expected1.emplace(2.0, 1L);
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expected1.emplace(9.5, 2L);
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expected1.emplace(17.5, 2L);
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expected1.emplace(23.0, 1L);
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expected1.emplace(36.0, 1L);
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auto expected_itr = expected1.begin();
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for (auto& actual : hist.bin) {
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auto entry = expected_itr++;
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// Asserts that two keys are equal to within a positive delta
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BOOST_REQUIRE(std::fabs(entry->first - actual.first) <= 0.01);
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BOOST_REQUIRE_EQUAL(entry->second, actual.second);
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}
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// merge test
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utils::streaming_histogram hist2(3);
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for (int i = 7; i < int(sizeof(samples)/sizeof(samples[0])); i++) {
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hist2.update(samples[i]);
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}
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hist.merge(hist2);
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// should end up (2,1),(9.5,2),(19.33,3),(32.67,3),(45,1)
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std::map<double, uint64_t> expected2;
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expected2.emplace(2.0, 1L);
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expected2.emplace(9.5, 2L);
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expected2.emplace(19.33, 3L);
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expected2.emplace(32.67, 3L);
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expected2.emplace(45.0, 1L);
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expected_itr = expected2.begin();
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for (auto& actual : hist.bin) {
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auto entry = expected_itr++;
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// Asserts that two keys are equal to within a positive delta
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BOOST_REQUIRE(std::fabs(entry->first - actual.first) <= 0.01);
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BOOST_REQUIRE_EQUAL(entry->second, actual.second);
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}
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// sum test
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BOOST_REQUIRE(std::fabs(3.28 - hist.sum(15)) <= 0.01);
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// sum test (b > max(hist))
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BOOST_REQUIRE(std::fabs(10.0 - hist.sum(50)) <= 0.01);
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}
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