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9#include "debug.h"
10#include "../perf.h"
11#include "../util/util.h"
12#include <subcmd/parse-options.h>
13#include "../util/header.h"
14#include "../util/cloexec.h"
15#include "../util/string2.h"
16#include "bench.h"
17#include "mem-memcpy-arch.h"
18#include "mem-memset-arch.h"
19
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <sys/time.h>
24#include <errno.h>
25#include <linux/time64.h>
26
27#define K 1024
28
29static const char *size_str = "1MB";
30static const char *function_str = "all";
31static int nr_loops = 1;
32static bool use_cycles;
33static int cycles_fd;
34
35static const struct option options[] = {
36 OPT_STRING('s', "size", &size_str, "1MB",
37 "Specify the size of the memory buffers. "
38 "Available units: B, KB, MB, GB and TB (case insensitive)"),
39
40 OPT_STRING('f', "function", &function_str, "all",
41 "Specify the function to run, \"all\" runs all available functions, \"help\" lists them"),
42
43 OPT_INTEGER('l', "nr_loops", &nr_loops,
44 "Specify the number of loops to run. (default: 1)"),
45
46 OPT_BOOLEAN('c', "cycles", &use_cycles,
47 "Use a cycles event instead of gettimeofday() to measure performance"),
48
49 OPT_END()
50};
51
52typedef void *(*memcpy_t)(void *, const void *, size_t);
53typedef void *(*memset_t)(void *, int, size_t);
54
55struct function {
56 const char *name;
57 const char *desc;
58 union {
59 memcpy_t memcpy;
60 memset_t memset;
61 } fn;
62};
63
64static struct perf_event_attr cycle_attr = {
65 .type = PERF_TYPE_HARDWARE,
66 .config = PERF_COUNT_HW_CPU_CYCLES
67};
68
69static int init_cycles(void)
70{
71 cycles_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, perf_event_open_cloexec_flag());
72
73 if (cycles_fd < 0 && errno == ENOSYS) {
74 pr_debug("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
75 return -1;
76 }
77
78 return cycles_fd;
79}
80
81static u64 get_cycles(void)
82{
83 int ret;
84 u64 clk;
85
86 ret = read(cycles_fd, &clk, sizeof(u64));
87 BUG_ON(ret != sizeof(u64));
88
89 return clk;
90}
91
92static double timeval2double(struct timeval *ts)
93{
94 return (double)ts->tv_sec + (double)ts->tv_usec / (double)USEC_PER_SEC;
95}
96
97#define print_bps(x) do { \
98 if (x < K) \
99 printf(" %14lf bytes/sec\n", x); \
100 else if (x < K * K) \
101 printf(" %14lfd KB/sec\n", x / K); \
102 else if (x < K * K * K) \
103 printf(" %14lf MB/sec\n", x / K / K); \
104 else \
105 printf(" %14lf GB/sec\n", x / K / K / K); \
106 } while (0)
107
108struct bench_mem_info {
109 const struct function *functions;
110 u64 (*do_cycles)(const struct function *r, size_t size, void *src, void *dst);
111 double (*do_gettimeofday)(const struct function *r, size_t size, void *src, void *dst);
112 const char *const *usage;
113 bool alloc_src;
114};
115
116static void __bench_mem_function(struct bench_mem_info *info, int r_idx, size_t size, double size_total)
117{
118 const struct function *r = &info->functions[r_idx];
119 double result_bps = 0.0;
120 u64 result_cycles = 0;
121 void *src = NULL, *dst = zalloc(size);
122
123 printf("# function '%s' (%s)\n", r->name, r->desc);
124
125 if (dst == NULL)
126 goto out_alloc_failed;
127
128 if (info->alloc_src) {
129 src = zalloc(size);
130 if (src == NULL)
131 goto out_alloc_failed;
132 }
133
134 if (bench_format == BENCH_FORMAT_DEFAULT)
135 printf("# Copying %s bytes ...\n\n", size_str);
136
137 if (use_cycles) {
138 result_cycles = info->do_cycles(r, size, src, dst);
139 } else {
140 result_bps = info->do_gettimeofday(r, size, src, dst);
141 }
142
143 switch (bench_format) {
144 case BENCH_FORMAT_DEFAULT:
145 if (use_cycles) {
146 printf(" %14lf cycles/byte\n", (double)result_cycles/size_total);
147 } else {
148 print_bps(result_bps);
149 }
150 break;
151
152 case BENCH_FORMAT_SIMPLE:
153 if (use_cycles) {
154 printf("%lf\n", (double)result_cycles/size_total);
155 } else {
156 printf("%lf\n", result_bps);
157 }
158 break;
159
160 default:
161 BUG_ON(1);
162 break;
163 }
164
165out_free:
166 free(src);
167 free(dst);
168 return;
169out_alloc_failed:
170 printf("# Memory allocation failed - maybe size (%s) is too large?\n", size_str);
171 goto out_free;
172}
173
174static int bench_mem_common(int argc, const char **argv, struct bench_mem_info *info)
175{
176 int i;
177 size_t size;
178 double size_total;
179
180 argc = parse_options(argc, argv, options, info->usage, 0);
181
182 if (use_cycles) {
183 i = init_cycles();
184 if (i < 0) {
185 fprintf(stderr, "Failed to open cycles counter\n");
186 return i;
187 }
188 }
189
190 size = (size_t)perf_atoll((char *)size_str);
191 size_total = (double)size * nr_loops;
192
193 if ((s64)size <= 0) {
194 fprintf(stderr, "Invalid size:%s\n", size_str);
195 return 1;
196 }
197
198 if (!strncmp(function_str, "all", 3)) {
199 for (i = 0; info->functions[i].name; i++)
200 __bench_mem_function(info, i, size, size_total);
201 return 0;
202 }
203
204 for (i = 0; info->functions[i].name; i++) {
205 if (!strcmp(info->functions[i].name, function_str))
206 break;
207 }
208 if (!info->functions[i].name) {
209 if (strcmp(function_str, "help") && strcmp(function_str, "h"))
210 printf("Unknown function: %s\n", function_str);
211 printf("Available functions:\n");
212 for (i = 0; info->functions[i].name; i++) {
213 printf("\t%s ... %s\n",
214 info->functions[i].name, info->functions[i].desc);
215 }
216 return 1;
217 }
218
219 __bench_mem_function(info, i, size, size_total);
220
221 return 0;
222}
223
224static u64 do_memcpy_cycles(const struct function *r, size_t size, void *src, void *dst)
225{
226 u64 cycle_start = 0ULL, cycle_end = 0ULL;
227 memcpy_t fn = r->fn.memcpy;
228 int i;
229
230
231 memset(src, 0, size);
232
233
234
235
236
237 fn(dst, src, size);
238
239 cycle_start = get_cycles();
240 for (i = 0; i < nr_loops; ++i)
241 fn(dst, src, size);
242 cycle_end = get_cycles();
243
244 return cycle_end - cycle_start;
245}
246
247static double do_memcpy_gettimeofday(const struct function *r, size_t size, void *src, void *dst)
248{
249 struct timeval tv_start, tv_end, tv_diff;
250 memcpy_t fn = r->fn.memcpy;
251 int i;
252
253
254
255
256
257 fn(dst, src, size);
258
259 BUG_ON(gettimeofday(&tv_start, NULL));
260 for (i = 0; i < nr_loops; ++i)
261 fn(dst, src, size);
262 BUG_ON(gettimeofday(&tv_end, NULL));
263
264 timersub(&tv_end, &tv_start, &tv_diff);
265
266 return (double)(((double)size * nr_loops) / timeval2double(&tv_diff));
267}
268
269struct function memcpy_functions[] = {
270 { .name = "default",
271 .desc = "Default memcpy() provided by glibc",
272 .fn.memcpy = memcpy },
273
274#ifdef HAVE_ARCH_X86_64_SUPPORT
275# define MEMCPY_FN(_fn, _name, _desc) {.name = _name, .desc = _desc, .fn.memcpy = _fn},
276# include "mem-memcpy-x86-64-asm-def.h"
277# undef MEMCPY_FN
278#endif
279
280 { .name = NULL, }
281};
282
283static const char * const bench_mem_memcpy_usage[] = {
284 "perf bench mem memcpy <options>",
285 NULL
286};
287
288int bench_mem_memcpy(int argc, const char **argv)
289{
290 struct bench_mem_info info = {
291 .functions = memcpy_functions,
292 .do_cycles = do_memcpy_cycles,
293 .do_gettimeofday = do_memcpy_gettimeofday,
294 .usage = bench_mem_memcpy_usage,
295 .alloc_src = true,
296 };
297
298 return bench_mem_common(argc, argv, &info);
299}
300
301static u64 do_memset_cycles(const struct function *r, size_t size, void *src __maybe_unused, void *dst)
302{
303 u64 cycle_start = 0ULL, cycle_end = 0ULL;
304 memset_t fn = r->fn.memset;
305 int i;
306
307
308
309
310
311 fn(dst, -1, size);
312
313 cycle_start = get_cycles();
314 for (i = 0; i < nr_loops; ++i)
315 fn(dst, i, size);
316 cycle_end = get_cycles();
317
318 return cycle_end - cycle_start;
319}
320
321static double do_memset_gettimeofday(const struct function *r, size_t size, void *src __maybe_unused, void *dst)
322{
323 struct timeval tv_start, tv_end, tv_diff;
324 memset_t fn = r->fn.memset;
325 int i;
326
327
328
329
330
331 fn(dst, -1, size);
332
333 BUG_ON(gettimeofday(&tv_start, NULL));
334 for (i = 0; i < nr_loops; ++i)
335 fn(dst, i, size);
336 BUG_ON(gettimeofday(&tv_end, NULL));
337
338 timersub(&tv_end, &tv_start, &tv_diff);
339
340 return (double)(((double)size * nr_loops) / timeval2double(&tv_diff));
341}
342
343static const char * const bench_mem_memset_usage[] = {
344 "perf bench mem memset <options>",
345 NULL
346};
347
348static const struct function memset_functions[] = {
349 { .name = "default",
350 .desc = "Default memset() provided by glibc",
351 .fn.memset = memset },
352
353#ifdef HAVE_ARCH_X86_64_SUPPORT
354# define MEMSET_FN(_fn, _name, _desc) { .name = _name, .desc = _desc, .fn.memset = _fn },
355# include "mem-memset-x86-64-asm-def.h"
356# undef MEMSET_FN
357#endif
358
359 { .name = NULL, }
360};
361
362int bench_mem_memset(int argc, const char **argv)
363{
364 struct bench_mem_info info = {
365 .functions = memset_functions,
366 .do_cycles = do_memset_cycles,
367 .do_gettimeofday = do_memset_gettimeofday,
368 .usage = bench_mem_memset_usage,
369 };
370
371 return bench_mem_common(argc, argv, &info);
372}
373
