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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* dbus-mempool.h Memory pools
*
* Copyright (C) 2002, 2003 Red Hat, Inc.
* Copyright (C) 2003 CodeFactory AB
* Copyright (C) 2013 Chengwei Yang / Intel
*
* SPDX-License-Identifier: AFL-2.1 OR GPL-2.0-or-later
*
* Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <config.h>
#include "misc-internals.h"
#include <stdio.h>
#include <time.h>
#include <dbus/dbus-mempool.h>
#include <dbus/dbus-internals.h>
static void
time_for_size (int size)
{
int i;
int j;
#ifdef DBUS_ENABLE_VERBOSE_MODE
clock_t start;
clock_t end;
#endif
#define FREE_ARRAY_SIZE 512
#define N_ITERATIONS FREE_ARRAY_SIZE * 512
void *to_free[FREE_ARRAY_SIZE];
DBusMemPool *pool;
_dbus_verbose ("Timings for size %d\n", size);
_dbus_verbose (" malloc\n");
#ifdef DBUS_ENABLE_VERBOSE_MODE
start = clock ();
#endif
i = 0;
j = 0;
while (i < N_ITERATIONS)
{
to_free[j] = dbus_malloc (size);
_dbus_assert (to_free[j] != NULL); /* in a real app of course this is wrong */
++j;
if (j == FREE_ARRAY_SIZE)
{
j = 0;
while (j < FREE_ARRAY_SIZE)
{
dbus_free (to_free[j]);
++j;
}
j = 0;
}
++i;
}
#ifdef DBUS_ENABLE_VERBOSE_MODE
end = clock ();
_dbus_verbose (" created/destroyed %d elements in %g seconds\n",
N_ITERATIONS, (end - start) / (double) CLOCKS_PER_SEC);
_dbus_verbose (" mempools\n");
start = clock ();
#endif
pool = _dbus_mem_pool_new (size, FALSE);
i = 0;
j = 0;
while (i < N_ITERATIONS)
{
to_free[j] = _dbus_mem_pool_alloc (pool);
_dbus_assert (to_free[j] != NULL); /* in a real app of course this is wrong */
++j;
if (j == FREE_ARRAY_SIZE)
{
j = 0;
while (j < FREE_ARRAY_SIZE)
{
_dbus_mem_pool_dealloc (pool, to_free[j]);
++j;
}
j = 0;
}
++i;
}
_dbus_mem_pool_free (pool);
#ifdef DBUS_ENABLE_VERBOSE_MODE
end = clock ();
_dbus_verbose (" created/destroyed %d elements in %g seconds\n",
N_ITERATIONS, (end - start) / (double) CLOCKS_PER_SEC);
_dbus_verbose (" zeroed malloc\n");
start = clock ();
#endif
i = 0;
j = 0;
while (i < N_ITERATIONS)
{
to_free[j] = dbus_malloc0 (size);
_dbus_assert (to_free[j] != NULL); /* in a real app of course this is wrong */
++j;
if (j == FREE_ARRAY_SIZE)
{
j = 0;
while (j < FREE_ARRAY_SIZE)
{
dbus_free (to_free[j]);
++j;
}
j = 0;
}
++i;
}
#ifdef DBUS_ENABLE_VERBOSE_MODE
end = clock ();
_dbus_verbose (" created/destroyed %d elements in %g seconds\n",
N_ITERATIONS, (end - start) / (double) CLOCKS_PER_SEC);
_dbus_verbose (" zeroed mempools\n");
start = clock ();
#endif
pool = _dbus_mem_pool_new (size, TRUE);
i = 0;
j = 0;
while (i < N_ITERATIONS)
{
to_free[j] = _dbus_mem_pool_alloc (pool);
_dbus_assert (to_free[j] != NULL); /* in a real app of course this is wrong */
++j;
if (j == FREE_ARRAY_SIZE)
{
j = 0;
while (j < FREE_ARRAY_SIZE)
{
_dbus_mem_pool_dealloc (pool, to_free[j]);
++j;
}
j = 0;
}
++i;
}
_dbus_mem_pool_free (pool);
#ifdef DBUS_ENABLE_VERBOSE_MODE
end = clock ();
_dbus_verbose (" created/destroyed %d elements in %g seconds\n",
N_ITERATIONS, (end - start) / (double) CLOCKS_PER_SEC);
#endif
}
/**
* @ingroup DBusMemPoolInternals
* Unit test for DBusMemPool
* @returns #TRUE on success.
*/
dbus_bool_t
_dbus_mem_pool_test (const char *test_data_dir _DBUS_GNUC_UNUSED)
{
int i;
int element_sizes[] = { 4, 8, 16, 50, 124 };
i = 0;
while (i < _DBUS_N_ELEMENTS (element_sizes))
{
time_for_size (element_sizes[i]);
++i;
}
return TRUE;
}
|
