1 /*
2 * memcpy benchmark.
3 *
4 * Copyright (c) 2020-2023, Arm Limited.
5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
6 */
7
8 #define _GNU_SOURCE
9 #include <stdint.h>
10 #include <stdio.h>
11 #include <string.h>
12 #include <assert.h>
13 #include "stringlib.h"
14 #include "benchlib.h"
15
16 #define ITERS 5000
17 #define ITERS2 20000000
18 #define ITERS3 200000
19 #define NUM_TESTS 16384
20 #define MIN_SIZE 32768
21 #define MAX_SIZE (1024 * 1024)
22
23 static uint8_t a[MAX_SIZE + 4096 + 64] __attribute__((__aligned__(4096)));
24 static uint8_t b[MAX_SIZE + 4096 + 64] __attribute__((__aligned__(4096)));
25
26 #define DOTEST(STR,TESTFN) \
27 printf (STR); \
28 RUN (TESTFN, memcpy); \
29 RUNA64 (TESTFN, __memcpy_aarch64); \
30 RUNA64 (TESTFN, __memcpy_aarch64_simd); \
31 RUNSVE (TESTFN, __memcpy_aarch64_sve); \
32 RUNMOPS (TESTFN, __memcpy_aarch64_mops); \
33 RUNA32 (TESTFN, __memcpy_arm); \
34 printf ("\n");
35
36 typedef struct { uint16_t size; uint16_t freq; } freq_data_t;
37 typedef struct { uint8_t align; uint16_t freq; } align_data_t;
38
39 #define SIZE_NUM 65536
40 #define SIZE_MASK (SIZE_NUM-1)
41 static uint8_t size_arr[SIZE_NUM];
42
43 /* Frequency data for memcpy of less than 4096 bytes based on SPEC2017. */
44 static freq_data_t size_freq[] =
45 {
46 {32,22320}, { 16,9554}, { 8,8915}, {152,5327}, { 4,2159}, {292,2035},
47 { 12,1608}, { 24,1343}, {1152,895}, {144, 813}, {884, 733}, {284, 721},
48 {120, 661}, { 2, 649}, {882, 550}, { 5, 475}, { 7, 461}, {108, 460},
49 { 10, 361}, { 9, 361}, { 6, 334}, { 3, 326}, {464, 308}, {2048,303},
50 { 1, 298}, { 64, 250}, { 11, 197}, {296, 194}, { 68, 187}, { 15, 185},
51 {192, 184}, {1764,183}, { 13, 173}, {560, 126}, {160, 115}, {288, 96},
52 {104, 96}, {1144, 83}, { 18, 80}, { 23, 78}, { 40, 77}, { 19, 68},
53 { 48, 63}, { 17, 57}, { 72, 54}, {1280, 51}, { 20, 49}, { 28, 47},
54 { 22, 46}, {640, 45}, { 25, 41}, { 14, 40}, { 56, 37}, { 27, 35},
55 { 35, 33}, {384, 33}, { 29, 32}, { 80, 30}, {4095, 22}, {232, 22},
56 { 36, 19}, {184, 17}, { 21, 17}, {256, 16}, { 44, 15}, { 26, 15},
57 { 31, 14}, { 88, 14}, {176, 13}, { 33, 12}, {1024, 12}, {208, 11},
58 { 62, 11}, {128, 10}, {704, 10}, {324, 10}, { 96, 10}, { 60, 9},
59 {136, 9}, {124, 9}, { 34, 8}, { 30, 8}, {480, 8}, {1344, 8},
60 {273, 7}, {520, 7}, {112, 6}, { 52, 6}, {344, 6}, {336, 6},
61 {504, 5}, {168, 5}, {424, 5}, { 0, 4}, { 76, 3}, {200, 3},
62 {512, 3}, {312, 3}, {240, 3}, {960, 3}, {264, 2}, {672, 2},
63 { 38, 2}, {328, 2}, { 84, 2}, { 39, 2}, {216, 2}, { 42, 2},
64 { 37, 2}, {1608, 2}, { 70, 2}, { 46, 2}, {536, 2}, {280, 1},
65 {248, 1}, { 47, 1}, {1088, 1}, {1288, 1}, {224, 1}, { 41, 1},
66 { 50, 1}, { 49, 1}, {808, 1}, {360, 1}, {440, 1}, { 43, 1},
67 { 45, 1}, { 78, 1}, {968, 1}, {392, 1}, { 54, 1}, { 53, 1},
68 { 59, 1}, {376, 1}, {664, 1}, { 58, 1}, {272, 1}, { 66, 1},
69 {2688, 1}, {472, 1}, {568, 1}, {720, 1}, { 51, 1}, { 63, 1},
70 { 86, 1}, {496, 1}, {776, 1}, { 57, 1}, {680, 1}, {792, 1},
71 {122, 1}, {760, 1}, {824, 1}, {552, 1}, { 67, 1}, {456, 1},
72 {984, 1}, { 74, 1}, {408, 1}, { 75, 1}, { 92, 1}, {576, 1},
73 {116, 1}, { 65, 1}, {117, 1}, { 82, 1}, {352, 1}, { 55, 1},
74 {100, 1}, { 90, 1}, {696, 1}, {111, 1}, {880, 1}, { 79, 1},
75 {488, 1}, { 61, 1}, {114, 1}, { 94, 1}, {1032, 1}, { 98, 1},
76 { 87, 1}, {584, 1}, { 85, 1}, {648, 1}, {0, 0}
77 };
78
79 #define ALIGN_NUM 1024
80 #define ALIGN_MASK (ALIGN_NUM-1)
81 static uint8_t src_align_arr[ALIGN_NUM];
82 static uint8_t dst_align_arr[ALIGN_NUM];
83
84 /* Source alignment frequency for memcpy based on SPEC2017. */
85 static align_data_t src_align_freq[] =
86 {
87 {8, 300}, {16, 292}, {32, 168}, {64, 153}, {4, 79}, {2, 14}, {1, 18}, {0, 0}
88 };
89
90 static align_data_t dst_align_freq[] =
91 {
92 {8, 265}, {16, 263}, {64, 209}, {32, 174}, {4, 90}, {2, 10}, {1, 13}, {0, 0}
93 };
94
95 typedef struct
96 {
97 uint64_t src : 24;
98 uint64_t dst : 24;
99 uint64_t len : 16;
100 } copy_t;
101
102 static copy_t test_arr[NUM_TESTS];
103
104 typedef char *(*proto_t) (char *, const char *, size_t);
105
106 static void
init_copy_distribution(void)107 init_copy_distribution (void)
108 {
109 int i, j, freq, size, n;
110
111 for (n = i = 0; (freq = size_freq[i].freq) != 0; i++)
112 for (j = 0, size = size_freq[i].size; j < freq; j++)
113 size_arr[n++] = size;
114 assert (n == SIZE_NUM);
115
116 for (n = i = 0; (freq = src_align_freq[i].freq) != 0; i++)
117 for (j = 0, size = src_align_freq[i].align; j < freq; j++)
118 src_align_arr[n++] = size - 1;
119 assert (n == ALIGN_NUM);
120
121 for (n = i = 0; (freq = dst_align_freq[i].freq) != 0; i++)
122 for (j = 0, size = dst_align_freq[i].align; j < freq; j++)
123 dst_align_arr[n++] = size - 1;
124 assert (n == ALIGN_NUM);
125 }
126
127 static size_t
init_copies(size_t max_size)128 init_copies (size_t max_size)
129 {
130 size_t total = 0;
131 /* Create a random set of copies with the given size and alignment
132 distributions. */
133 for (int i = 0; i < NUM_TESTS; i++)
134 {
135 test_arr[i].dst = (rand32 (0) & (max_size - 1));
136 test_arr[i].dst &= ~dst_align_arr[rand32 (0) & ALIGN_MASK];
137 test_arr[i].src = (rand32 (0) & (max_size - 1));
138 test_arr[i].src &= ~src_align_arr[rand32 (0) & ALIGN_MASK];
139 test_arr[i].len = size_arr[rand32 (0) & SIZE_MASK];
140 total += test_arr[i].len;
141 }
142
143 return total;
144 }
145
146 static void inline __attribute ((always_inline))
memcpy_random(const char * name,void * (* fn)(void *,const void *,size_t))147 memcpy_random (const char *name, void *(*fn)(void *, const void *, size_t))
148 {
149 printf ("%22s ", name);
150 uint64_t total = 0, tsum = 0;
151 for (int size = MIN_SIZE; size <= MAX_SIZE; size *= 2)
152 {
153 uint64_t copy_size = init_copies (size) * ITERS;
154
155 for (int c = 0; c < NUM_TESTS; c++)
156 fn (b + test_arr[c].dst, a + test_arr[c].src, test_arr[c].len);
157
158 uint64_t t = clock_get_ns ();
159 for (int i = 0; i < ITERS; i++)
160 for (int c = 0; c < NUM_TESTS; c++)
161 fn (b + test_arr[c].dst, a + test_arr[c].src, test_arr[c].len);
162 t = clock_get_ns () - t;
163 total += copy_size;
164 tsum += t;
165 printf ("%dK: %5.2f ", size / 1024, (double)copy_size / t);
166 }
167 printf( "avg %5.2f\n", (double)total / tsum);
168 }
169
170 static void inline __attribute ((always_inline))
memcpy_medium_aligned(const char * name,void * (* fn)(void *,const void *,size_t))171 memcpy_medium_aligned (const char *name, void *(*fn)(void *, const void *, size_t))
172 {
173 printf ("%22s ", name);
174
175 for (int size = 8; size <= 512; size *= 2)
176 {
177 uint64_t t = clock_get_ns ();
178 for (int i = 0; i < ITERS2; i++)
179 fn (b, a, size);
180 t = clock_get_ns () - t;
181 printf ("%dB: %5.2f ", size, (double)size * ITERS2 / t);
182 }
183 printf ("\n");
184 }
185
186 static void inline __attribute ((always_inline))
memcpy_medium_unaligned(const char * name,void * (* fn)(void *,const void *,size_t))187 memcpy_medium_unaligned (const char *name, void *(*fn)(void *, const void *, size_t))
188 {
189 printf ("%22s ", name);
190
191 for (int size = 8; size <= 512; size *= 2)
192 {
193 uint64_t t = clock_get_ns ();
194 for (int i = 0; i < ITERS2; i++)
195 fn (b + 3, a + 1, size);
196 t = clock_get_ns () - t;
197 printf ("%dB: %5.2f ", size, (double)size * ITERS2 / t);
198 }
199 printf ("\n");
200 }
201
202 static void inline __attribute ((always_inline))
memcpy_large(const char * name,void * (* fn)(void *,const void *,size_t))203 memcpy_large (const char *name, void *(*fn)(void *, const void *, size_t))
204 {
205 printf ("%22s ", name);
206
207 for (int size = 1024; size <= 65536; size *= 2)
208 {
209 uint64_t t = clock_get_ns ();
210 for (int i = 0; i < ITERS3; i++)
211 fn (b, a, size);
212 t = clock_get_ns () - t;
213 printf ("%dK: %5.2f ", size / 1024, (double)size * ITERS3 / t);
214 }
215 printf ("\n");
216 }
217
218 static void inline __attribute ((always_inline))
memmove_forward_unaligned(const char * name,void * (* fn)(void *,const void *,size_t))219 memmove_forward_unaligned (const char *name, void *(*fn)(void *, const void *, size_t))
220 {
221 printf ("%22s ", name);
222
223 for (int size = 1024; size <= 65536; size *= 2)
224 {
225 uint64_t t = clock_get_ns ();
226 for (int i = 0; i < ITERS3; i++)
227 fn (a, a + 256 + (i & 31), size);
228 t = clock_get_ns () - t;
229 printf ("%dK: %5.2f ", size / 1024, (double)size * ITERS3 / t);
230 }
231
232 printf ("\n");
233 }
234
235 static void inline __attribute ((always_inline))
memmove_backward_unaligned(const char * name,void * (* fn)(void *,const void *,size_t))236 memmove_backward_unaligned (const char *name, void *(*fn)(void *, const void *, size_t))
237 {
238 printf ("%22s ", name);
239
240 for (int size = 1024; size <= 65536; size *= 2)
241 {
242 uint64_t t = clock_get_ns ();
243 for (int i = 0; i < ITERS3; i++)
244 fn (a + 256 + (i & 31), a, size);
245 t = clock_get_ns () - t;
246 printf ("%dK: %5.2f ", size / 1024, (double)size * ITERS3 / t);
247 }
248
249 printf ("\n");
250 }
251
main(void)252 int main (void)
253 {
254 init_copy_distribution ();
255
256 memset (a, 1, sizeof (a));
257 memset (b, 2, sizeof (b));
258
259 DOTEST ("Random memcpy (bytes/ns):\n", memcpy_random);
260 DOTEST ("Medium memcpy aligned (bytes/ns):\n", memcpy_medium_aligned);
261 DOTEST ("Medium memcpy unaligned (bytes/ns):\n", memcpy_medium_unaligned);
262 DOTEST ("Large memcpy (bytes/ns):\n", memcpy_large);
263 DOTEST ("Forwards memmove unaligned (bytes/ns):\n", memmove_forward_unaligned);
264 DOTEST ("Backwards memmove unaligned (bytes/ns):\n", memmove_backward_unaligned);
265
266 return 0;
267 }
268