-
Notifications
You must be signed in to change notification settings - Fork 97
/
memcpy.c
267 lines (229 loc) · 8.6 KB
/
memcpy.c
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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
/*
* memcpy benchmark.
*
* Copyright (c) 2020-2023, Arm Limited.
* SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
*/
#define _GNU_SOURCE
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "stringlib.h"
#include "benchlib.h"
#define ITERS 5000
#define ITERS2 20000000
#define ITERS3 200000
#define NUM_TESTS 16384
#define MIN_SIZE 32768
#define MAX_SIZE (1024 * 1024)
static uint8_t a[MAX_SIZE + 4096 + 64] __attribute__((__aligned__(4096)));
static uint8_t b[MAX_SIZE + 4096 + 64] __attribute__((__aligned__(4096)));
#define DOTEST(STR,TESTFN) \
printf (STR); \
RUN (TESTFN, memcpy); \
RUNA64 (TESTFN, __memcpy_aarch64); \
RUNA64 (TESTFN, __memcpy_aarch64_simd); \
RUNSVE (TESTFN, __memcpy_aarch64_sve); \
RUNMOPS (TESTFN, __memcpy_aarch64_mops); \
RUNA32 (TESTFN, __memcpy_arm); \
printf ("\n");
typedef struct { uint16_t size; uint16_t freq; } freq_data_t;
typedef struct { uint8_t align; uint16_t freq; } align_data_t;
#define SIZE_NUM 65536
#define SIZE_MASK (SIZE_NUM-1)
static uint8_t size_arr[SIZE_NUM];
/* Frequency data for memcpy of less than 4096 bytes based on SPEC2017. */
static freq_data_t size_freq[] =
{
{32,22320}, { 16,9554}, { 8,8915}, {152,5327}, { 4,2159}, {292,2035},
{ 12,1608}, { 24,1343}, {1152,895}, {144, 813}, {884, 733}, {284, 721},
{120, 661}, { 2, 649}, {882, 550}, { 5, 475}, { 7, 461}, {108, 460},
{ 10, 361}, { 9, 361}, { 6, 334}, { 3, 326}, {464, 308}, {2048,303},
{ 1, 298}, { 64, 250}, { 11, 197}, {296, 194}, { 68, 187}, { 15, 185},
{192, 184}, {1764,183}, { 13, 173}, {560, 126}, {160, 115}, {288, 96},
{104, 96}, {1144, 83}, { 18, 80}, { 23, 78}, { 40, 77}, { 19, 68},
{ 48, 63}, { 17, 57}, { 72, 54}, {1280, 51}, { 20, 49}, { 28, 47},
{ 22, 46}, {640, 45}, { 25, 41}, { 14, 40}, { 56, 37}, { 27, 35},
{ 35, 33}, {384, 33}, { 29, 32}, { 80, 30}, {4095, 22}, {232, 22},
{ 36, 19}, {184, 17}, { 21, 17}, {256, 16}, { 44, 15}, { 26, 15},
{ 31, 14}, { 88, 14}, {176, 13}, { 33, 12}, {1024, 12}, {208, 11},
{ 62, 11}, {128, 10}, {704, 10}, {324, 10}, { 96, 10}, { 60, 9},
{136, 9}, {124, 9}, { 34, 8}, { 30, 8}, {480, 8}, {1344, 8},
{273, 7}, {520, 7}, {112, 6}, { 52, 6}, {344, 6}, {336, 6},
{504, 5}, {168, 5}, {424, 5}, { 0, 4}, { 76, 3}, {200, 3},
{512, 3}, {312, 3}, {240, 3}, {960, 3}, {264, 2}, {672, 2},
{ 38, 2}, {328, 2}, { 84, 2}, { 39, 2}, {216, 2}, { 42, 2},
{ 37, 2}, {1608, 2}, { 70, 2}, { 46, 2}, {536, 2}, {280, 1},
{248, 1}, { 47, 1}, {1088, 1}, {1288, 1}, {224, 1}, { 41, 1},
{ 50, 1}, { 49, 1}, {808, 1}, {360, 1}, {440, 1}, { 43, 1},
{ 45, 1}, { 78, 1}, {968, 1}, {392, 1}, { 54, 1}, { 53, 1},
{ 59, 1}, {376, 1}, {664, 1}, { 58, 1}, {272, 1}, { 66, 1},
{2688, 1}, {472, 1}, {568, 1}, {720, 1}, { 51, 1}, { 63, 1},
{ 86, 1}, {496, 1}, {776, 1}, { 57, 1}, {680, 1}, {792, 1},
{122, 1}, {760, 1}, {824, 1}, {552, 1}, { 67, 1}, {456, 1},
{984, 1}, { 74, 1}, {408, 1}, { 75, 1}, { 92, 1}, {576, 1},
{116, 1}, { 65, 1}, {117, 1}, { 82, 1}, {352, 1}, { 55, 1},
{100, 1}, { 90, 1}, {696, 1}, {111, 1}, {880, 1}, { 79, 1},
{488, 1}, { 61, 1}, {114, 1}, { 94, 1}, {1032, 1}, { 98, 1},
{ 87, 1}, {584, 1}, { 85, 1}, {648, 1}, {0, 0}
};
#define ALIGN_NUM 1024
#define ALIGN_MASK (ALIGN_NUM-1)
static uint8_t src_align_arr[ALIGN_NUM];
static uint8_t dst_align_arr[ALIGN_NUM];
/* Source alignment frequency for memcpy based on SPEC2017. */
static align_data_t src_align_freq[] =
{
{8, 300}, {16, 292}, {32, 168}, {64, 153}, {4, 79}, {2, 14}, {1, 18}, {0, 0}
};
static align_data_t dst_align_freq[] =
{
{8, 265}, {16, 263}, {64, 209}, {32, 174}, {4, 90}, {2, 10}, {1, 13}, {0, 0}
};
typedef struct
{
uint64_t src : 24;
uint64_t dst : 24;
uint64_t len : 16;
} copy_t;
static copy_t test_arr[NUM_TESTS];
typedef char *(*proto_t) (char *, const char *, size_t);
static void
init_copy_distribution (void)
{
int i, j, freq, size, n;
for (n = i = 0; (freq = size_freq[i].freq) != 0; i++)
for (j = 0, size = size_freq[i].size; j < freq; j++)
size_arr[n++] = size;
assert (n == SIZE_NUM);
for (n = i = 0; (freq = src_align_freq[i].freq) != 0; i++)
for (j = 0, size = src_align_freq[i].align; j < freq; j++)
src_align_arr[n++] = size - 1;
assert (n == ALIGN_NUM);
for (n = i = 0; (freq = dst_align_freq[i].freq) != 0; i++)
for (j = 0, size = dst_align_freq[i].align; j < freq; j++)
dst_align_arr[n++] = size - 1;
assert (n == ALIGN_NUM);
}
static size_t
init_copies (size_t max_size)
{
size_t total = 0;
/* Create a random set of copies with the given size and alignment
distributions. */
for (int i = 0; i < NUM_TESTS; i++)
{
test_arr[i].dst = (rand32 (0) & (max_size - 1));
test_arr[i].dst &= ~dst_align_arr[rand32 (0) & ALIGN_MASK];
test_arr[i].src = (rand32 (0) & (max_size - 1));
test_arr[i].src &= ~src_align_arr[rand32 (0) & ALIGN_MASK];
test_arr[i].len = size_arr[rand32 (0) & SIZE_MASK];
total += test_arr[i].len;
}
return total;
}
static void inline __attribute ((always_inline))
memcpy_random (const char *name, void *(*fn)(void *, const void *, size_t))
{
printf ("%22s ", name);
uint64_t total = 0, tsum = 0;
for (int size = MIN_SIZE; size <= MAX_SIZE; size *= 2)
{
uint64_t copy_size = init_copies (size) * ITERS;
for (int c = 0; c < NUM_TESTS; c++)
fn (b + test_arr[c].dst, a + test_arr[c].src, test_arr[c].len);
uint64_t t = clock_get_ns ();
for (int i = 0; i < ITERS; i++)
for (int c = 0; c < NUM_TESTS; c++)
fn (b + test_arr[c].dst, a + test_arr[c].src, test_arr[c].len);
t = clock_get_ns () - t;
total += copy_size;
tsum += t;
printf ("%dK: %5.2f ", size / 1024, (double)copy_size / t);
}
printf( "avg %5.2f\n", (double)total / tsum);
}
static void inline __attribute ((always_inline))
memcpy_medium_aligned (const char *name, void *(*fn)(void *, const void *, size_t))
{
printf ("%22s ", name);
for (int size = 8; size <= 512; size *= 2)
{
uint64_t t = clock_get_ns ();
for (int i = 0; i < ITERS2; i++)
fn (b, a, size);
t = clock_get_ns () - t;
printf ("%dB: %5.2f ", size, (double)size * ITERS2 / t);
}
printf ("\n");
}
static void inline __attribute ((always_inline))
memcpy_medium_unaligned (const char *name, void *(*fn)(void *, const void *, size_t))
{
printf ("%22s ", name);
for (int size = 8; size <= 512; size *= 2)
{
uint64_t t = clock_get_ns ();
for (int i = 0; i < ITERS2; i++)
fn (b + 3, a + 1, size);
t = clock_get_ns () - t;
printf ("%dB: %5.2f ", size, (double)size * ITERS2 / t);
}
printf ("\n");
}
static void inline __attribute ((always_inline))
memcpy_large (const char *name, void *(*fn)(void *, const void *, size_t))
{
printf ("%22s ", name);
for (int size = 1024; size <= 65536; size *= 2)
{
uint64_t t = clock_get_ns ();
for (int i = 0; i < ITERS3; i++)
fn (b, a, size);
t = clock_get_ns () - t;
printf ("%dK: %5.2f ", size / 1024, (double)size * ITERS3 / t);
}
printf ("\n");
}
static void inline __attribute ((always_inline))
memmove_forward_unaligned (const char *name, void *(*fn)(void *, const void *, size_t))
{
printf ("%22s ", name);
for (int size = 1024; size <= 65536; size *= 2)
{
uint64_t t = clock_get_ns ();
for (int i = 0; i < ITERS3; i++)
fn (a, a + 256 + (i & 31), size);
t = clock_get_ns () - t;
printf ("%dK: %5.2f ", size / 1024, (double)size * ITERS3 / t);
}
printf ("\n");
}
static void inline __attribute ((always_inline))
memmove_backward_unaligned (const char *name, void *(*fn)(void *, const void *, size_t))
{
printf ("%22s ", name);
for (int size = 1024; size <= 65536; size *= 2)
{
uint64_t t = clock_get_ns ();
for (int i = 0; i < ITERS3; i++)
fn (a + 256 + (i & 31), a, size);
t = clock_get_ns () - t;
printf ("%dK: %5.2f ", size / 1024, (double)size * ITERS3 / t);
}
printf ("\n");
}
int main (void)
{
init_copy_distribution ();
memset (a, 1, sizeof (a));
memset (b, 2, sizeof (b));
DOTEST ("Random memcpy (bytes/ns):\n", memcpy_random);
DOTEST ("Medium memcpy aligned (bytes/ns):\n", memcpy_medium_aligned);
DOTEST ("Medium memcpy unaligned (bytes/ns):\n", memcpy_medium_unaligned);
DOTEST ("Large memcpy (bytes/ns):\n", memcpy_large);
DOTEST ("Forwards memmove unaligned (bytes/ns):\n", memmove_forward_unaligned);
DOTEST ("Backwards memmove unaligned (bytes/ns):\n", memmove_backward_unaligned);
return 0;
}