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
|
/* Benchmark malloc and free functions.
Copyright (C) 2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <sys/resource.h>
#include "bench-timing.h"
#include "json-lib.h"
/* Benchmark the malloc/free performance of a varying number of blocks of a
given size. This enables performance tracking of the t-cache and fastbins.
It tests 3 different scenarios: single-threaded using main arena,
multi-threaded using thread-arena, and main arena with SINGLE_THREAD_P
false. */
#define NUM_ITERS 200000
#define NUM_ALLOCS 4
#define MAX_ALLOCS 1600
typedef struct
{
size_t iters;
size_t size;
int n;
timing_t elapsed;
} malloc_args;
static void
do_benchmark (malloc_args *args, int **arr)
{
timing_t start, stop;
size_t iters = args->iters;
size_t size = args->size;
int n = args->n;
TIMING_NOW (start);
for (int j = 0; j < iters; j++)
{
for (int i = 0; i < n; i++)
arr[i] = malloc (size);
for (int i = 0; i < n; i++)
free (arr[i]);
}
TIMING_NOW (stop);
TIMING_DIFF (args->elapsed, start, stop);
}
static malloc_args tests[3][NUM_ALLOCS];
static int allocs[NUM_ALLOCS] = { 25, 100, 400, MAX_ALLOCS };
static void *
thread_test (void *p)
{
int **arr = (int**)p;
/* Run benchmark multi-threaded. */
for (int i = 0; i < NUM_ALLOCS; i++)
do_benchmark (&tests[2][i], arr);
return p;
}
void
bench (unsigned long size)
{
size_t iters = NUM_ITERS;
int **arr = (int**) malloc (MAX_ALLOCS * sizeof (void*));
for (int t = 0; t < 3; t++)
for (int i = 0; i < NUM_ALLOCS; i++)
{
tests[t][i].n = allocs[i];
tests[t][i].size = size;
tests[t][i].iters = iters / allocs[i];
/* Do a quick warmup run. */
if (t == 0)
do_benchmark (&tests[0][i], arr);
}
/* Run benchmark single threaded in main_arena. */
for (int i = 0; i < NUM_ALLOCS; i++)
do_benchmark (&tests[0][i], arr);
/* Run benchmark in a thread_arena. */
pthread_t t;
pthread_create (&t, NULL, thread_test, (void*)arr);
pthread_join (t, NULL);
/* Repeat benchmark in main_arena with SINGLE_THREAD_P == false. */
for (int i = 0; i < NUM_ALLOCS; i++)
do_benchmark (&tests[1][i], arr);
free (arr);
json_ctx_t json_ctx;
json_init (&json_ctx, 0, stdout);
json_document_begin (&json_ctx);
json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
json_attr_object_begin (&json_ctx, "functions");
json_attr_object_begin (&json_ctx, "malloc");
char s[100];
double iters2 = iters;
json_attr_object_begin (&json_ctx, "");
json_attr_double (&json_ctx, "malloc_block_size", size);
struct rusage usage;
getrusage (RUSAGE_SELF, &usage);
json_attr_double (&json_ctx, "max_rss", usage.ru_maxrss);
for (int i = 0; i < NUM_ALLOCS; i++)
{
sprintf (s, "main_arena_st_allocs_%04d_time", allocs[i]);
json_attr_double (&json_ctx, s, tests[0][i].elapsed / iters2);
}
for (int i = 0; i < NUM_ALLOCS; i++)
{
sprintf (s, "main_arena_mt_allocs_%04d_time", allocs[i]);
json_attr_double (&json_ctx, s, tests[1][i].elapsed / iters2);
}
for (int i = 0; i < NUM_ALLOCS; i++)
{
sprintf (s, "thread_arena__allocs_%04d_time", allocs[i]);
json_attr_double (&json_ctx, s, tests[2][i].elapsed / iters2);
}
json_attr_object_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_document_end (&json_ctx);
}
static void usage (const char *name)
{
fprintf (stderr, "%s: <alloc_size>\n", name);
exit (1);
}
int
main (int argc, char **argv)
{
long val = 16;
if (argc == 2)
val = strtol (argv[1], NULL, 0);
if (argc > 2 || val <= 0)
usage (argv[0]);
bench (val);
return 0;
}
|
