blob: 7df0b3aafe209df5e363f70d0ee3c4300b71f6c0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. You may not use this file except in compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Copyright (C) 2018 ScyllaDB Ltd.
*/
#include <seastar/core/reactor.hh>
#include <seastar/testing/test_case.hh>
#include <seastar/testing/thread_test_case.hh>
#include <atomic>
#include <chrono>
using namespace seastar;
using namespace std::chrono_literals;
class temporary_stall_detector_settings {
std::chrono::milliseconds _old_threshold;
std::function<void ()> _old_report;
public:
temporary_stall_detector_settings(std::chrono::duration<double> threshold, std::function<void ()> report)
: _old_threshold(engine().get_blocked_reactor_notify_ms())
, _old_report(engine().get_stall_detector_report_function()) {
engine().update_blocked_reactor_notify_ms(std::chrono::duration_cast<std::chrono::milliseconds>(threshold));
engine().set_stall_detector_report_function(std::move(report));
}
~temporary_stall_detector_settings() {
engine().update_blocked_reactor_notify_ms(_old_threshold);
engine().set_stall_detector_report_function(std::move(_old_report));
}
};
void spin(std::chrono::duration<double> how_much) {
auto end = std::chrono::steady_clock::now() + how_much;
while (std::chrono::steady_clock::now() < end) {
// spin!
}
}
void spin_some_cooperatively(std::chrono::duration<double> how_much) {
auto end = std::chrono::steady_clock::now() + how_much;
while (std::chrono::steady_clock::now() < end) {
spin(200us);
if (need_preempt()) {
thread::yield();
}
}
}
SEASTAR_THREAD_TEST_CASE(normal_case) {
std::atomic<unsigned> reports{};
temporary_stall_detector_settings tsds(10ms, [&] { ++reports; });
spin_some_cooperatively(1s);
BOOST_REQUIRE_EQUAL(reports, 0);
}
SEASTAR_THREAD_TEST_CASE(simple_stalls) {
std::atomic<unsigned> reports{};
temporary_stall_detector_settings tsds(10ms, [&] { ++reports; });
unsigned nr = 10;
for (unsigned i = 0; i < nr; ++i) {
spin_some_cooperatively(100ms);
spin(20ms);
}
spin_some_cooperatively(100ms);
BOOST_REQUIRE_EQUAL(reports, 10);
}
|
