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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/* Probes the OS and filing system for various characteristics
(C) 2015-2017 Niall Douglas <http://www.nedproductions.biz/> (3 commits)
File Created: Nov 2015
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License in the accompanying file
Licence.txt or 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.
Distributed under the Boost Software License, Version 1.0.
(See accompanying file Licence.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
*/
#define _CRT_SECURE_NO_WARNINGS 1
#include "../../include/afio/afio.hpp"
#include <fstream>
#include <iomanip>
#include <iostream>
#ifdef __linux__
#define file_handle AFIO_V2_NAMESPACE::file_handle
#endif
constexpr unsigned permute_flags_max = 4;
static const std::regex sp_preamble{"(system|storage).*"};
static AFIO_V2_NAMESPACE::storage_profile::storage_profile profile[permute_flags_max];
#define RETCHECK(expr) \
{ \
auto ret = (expr); \
if(ret.has_error()) \
{ \
std::cerr << "WARNING: Operation " #expr " failed due to '" << ret.error().message() << "'" << std::endl; \
abort(); \
} \
}
int main(int argc, char *argv[])
{
using namespace AFIO_V2_NAMESPACE;
using AFIO_V2_NAMESPACE::byte;
std::regex torun(".*");
bool regexvalid = false;
unsigned torunflags = (1 << permute_flags_max) - 1;
if(argc > 1)
{
try
{
torun.assign(argv[1]);
regexvalid = true;
}
catch(...)
{
}
if(argc > 2)
torunflags = atoi(argv[2]);
if(!regexvalid)
{
std::cerr << "Usage: " << argv[0] << " <regex for tests to run> [<flags>]" << std::endl;
return 1;
}
}
// Force extent allocation before test begins
auto make_testfile = [](std::string name) {
// Create file with O_SYNC
auto _testfile(file_handle::file({}, name, handle::mode::write, handle::creation::if_needed, handle::caching::reads));
if(!_testfile)
{
std::cerr << "WARNING: Failed to create test file due to '" << _testfile.error().message() << "', failing" << std::endl;
abort();
}
file_handle testfile(std::move(_testfile.value()));
std::vector<byte> buffer(1024 * 1024 * 1024);
RETCHECK(testfile.truncate(buffer.size()));
file_handle::const_buffer_type _reqs[1] = {{buffer.data(), buffer.size()}};
file_handle::io_request<file_handle::const_buffers_type> reqs(_reqs, 0);
RETCHECK(testfile.write(reqs));
};
if(std::regex_match("latency:read:qd16", torun) || std::regex_match("latency:write:qd16", torun) || std::regex_match("latency:readwrite:qd4", torun))
{
std::cout << "Writing 17Gb of temporary test files, this will take a while ..." << std::endl;
make_testfile("test");
for(size_t n = 0; n < 16; n++)
make_testfile(std::to_string(n));
}
else
{
std::cout << "Writing 1Gb of temporary test files, this will take a while ..." << std::endl;
make_testfile("test");
}
// File closes, as it was opened with O_SYNC it forces extent allocation
// Drop filesystem caches
{
std::cout << "Attempting to flush all modified data in system and drop all filesystem caches ..." << std::endl;
result<void> o = utils::drop_filesystem_cache();
if(o)
{
std::cout << " Success!" << std::endl;
}
else
{
std::cout << " WARNING: Failed due to " << o.error().message() << std::endl;
}
}
// Pause as Windows still takes a while
std::cout << "Waiting for hard drive to quieten after temp files written ..." << std::endl;
std::this_thread::sleep_for(std::chrono::seconds(10));
std::ofstream results("fs_probe_results.yaml", std::ios::app);
{
auto put_time = [](const std::tm *tmb, const char *fmt) {
std::string buffer(256, 0);
buffer.resize(std::strftime((char *) buffer.data(), buffer.size(), fmt, tmb));
return buffer;
};
std::time_t t = std::time(nullptr);
results << "---\ntimestamp: " << put_time(std::gmtime(&t), "%F %T %z") << "\n";
}
bool first = true;
for(unsigned flags = 0; flags < permute_flags_max; flags++)
{
if((1 << flags) & torunflags)
{
handle::caching strategy = handle::caching::all;
switch(flags)
{
case 1:
strategy = handle::caching::only_metadata; // O_DIRECT
break;
case 2:
strategy = handle::caching::reads; // O_SYNC
break;
case 3:
strategy = handle::caching::none; // O_DIRECT|O_SYNC
break;
}
std::cout << "\ndirect=" << !!(flags & 1) << " sync=" << !!(flags & 2) << ":\n";
auto _testfile(file_handle::file({}, "test", handle::mode::write, handle::creation::open_existing, strategy));
if(!_testfile)
{
std::cerr << "WARNING: Failed to create test file due to '" << _testfile.error().message() << "', skipping" << std::endl;
continue;
}
file_handle testfile(std::move(_testfile.value()));
for(auto begin = std::chrono::steady_clock::now(); std::chrono::duration_cast<std::chrono::seconds>(std::chrono::steady_clock::now() - begin).count() < 3;)
;
for(auto &test : profile[flags])
{
if(std::regex_match(test.name, torun))
{
std::cout << "Running test " << test.name << " ..." << std::endl;
auto result = test(profile[flags], testfile);
if(result)
{
test.invoke([](auto &i) { std::cout << " " << i.name << " = " << i.value << std::endl; });
}
else
std::cerr << " ERROR running test '" << test.name << "': " << print(result) << std::endl;
}
}
// Write out results for this combination of flags
if(first)
{
profile[flags].write(results, sp_preamble);
first = false;
}
results << "direct=" << !!(flags & 1) << " sync=" << !!(flags & 2) << ":\n";
profile[flags].write(results, sp_preamble, 4, true);
results.flush();
}
}
// Delete the test file
auto delete_testfile = [](std::string name) {
auto _testfile(file_handle::file({}, name, handle::mode::write));
if(!_testfile)
{
std::cerr << "WARNING: Failed to open test file due to '" << _testfile.error().message() << std::endl;
abort();
}
auto out = _testfile.value().unlink();
if(!out)
{
std::cerr << "WARNING: Failed to unlink test file due to '" << out.error().message() << std::endl;
abort();
}
};
delete_testfile("test");
if(std::regex_match("latency:read:qd16", torun) || std::regex_match("latency:write:qd16", torun) || std::regex_match("latency:readwrite:qd4", torun))
{
for(size_t n = 0; n < 16; n++)
delete_testfile(std::to_string(n));
}
return 0;
}
|
