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1 | /* |
2 | * Copyright (C) 2018 ScyllaDB | |
3 | */ | |
4 | ||
5 | /* | |
6 | * This file is open source software, licensed to you under the terms | |
7 | * of the Apache License, Version 2.0 (the "License"). See the NOTICE file | |
8 | * distributed with this work for additional information regarding copyright | |
9 | * ownership. You may not use this file except in compliance with the License. | |
10 | * | |
11 | * You may obtain a copy of the License at | |
12 | * | |
13 | * http://www.apache.org/licenses/LICENSE-2.0 | |
14 | * | |
15 | * Unless required by applicable law or agreed to in writing, | |
16 | * software distributed under the License is distributed on an | |
17 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
18 | * KIND, either express or implied. See the License for the | |
19 | * specific language governing permissions and limitations | |
20 | * under the License. | |
21 | */ | |
22 | ||
23 | #pragma once | |
24 | ||
25 | #include <seastar/core/future.hh> | |
26 | #include <seastar/util/noncopyable_function.hh> | |
27 | ||
28 | #include <chrono> | |
29 | #include <iosfwd> | |
30 | ||
31 | // Instrumentation to detect context switches during reactor execution | |
32 | // and associated stall time, intended for use in tests | |
33 | ||
34 | namespace seastar { | |
35 | ||
36 | namespace internal { | |
37 | ||
38 | struct stall_report { | |
39 | uint64_t kernel_stalls; | |
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40 | sched_clock::duration run_wall_time; // excludes sleeps |
41 | sched_clock::duration stall_time; | |
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42 | }; |
43 | ||
44 | /// Run the unit-under-test (uut) function until completion, and report on any | |
45 | /// reactor stalls it generated. | |
46 | future<stall_report> report_reactor_stalls(noncopyable_function<future<> ()> uut); | |
47 | ||
48 | std::ostream& operator<<(std::ostream& os, const stall_report& sr); | |
49 | ||
50 | } | |
51 | ||
52 | } | |
53 |