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10#include "debug.h"
11#include "../perf.h"
12#include "../util/util.h"
13#include <subcmd/parse-options.h>
14#include "../util/header.h"
15#include "../util/cloexec.h"
16#include "../util/string2.h"
17#include "bench.h"
18#include "mem-memcpy-arch.h"
19#include "mem-memset-arch.h"
20
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <sys/time.h>
25#include <errno.h>
26#include <linux/time64.h>
27
28#define K 1024
29
30static const char *size_str = "1MB";
31static const char *function_str = "all";
32static int nr_loops = 1;
33static bool use_cycles;
34static int cycles_fd;
35
36static const struct option options[] = {
37 OPT_STRING('s', "size", &size_str, "1MB",
38 "Specify the size of the memory buffers. "
39 "Available units: B, KB, MB, GB and TB (case insensitive)"),
40
41 OPT_STRING('f', "function", &function_str, "all",
42 "Specify the function to run, \"all\" runs all available functions, \"help\" lists them"),
43
44 OPT_INTEGER('l', "nr_loops", &nr_loops,
45 "Specify the number of loops to run. (default: 1)"),
46
47 OPT_BOOLEAN('c', "cycles", &use_cycles,
48 "Use a cycles event instead of gettimeofday() to measure performance"),
49
50 OPT_END()
51};
52
53typedef void *(*memcpy_t)(void *, const void *, size_t);
54typedef void *(*memset_t)(void *, int, size_t);
55
56struct function {
57 const char *name;
58 const char *desc;
59 union {
60 memcpy_t memcpy;
61 memset_t memset;
62 } fn;
63};
64
65static struct perf_event_attr cycle_attr = {
66 .type = PERF_TYPE_HARDWARE,
67 .config = PERF_COUNT_HW_CPU_CYCLES
68};
69
70static int init_cycles(void)
71{
72 cycles_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, perf_event_open_cloexec_flag());
73
74 if (cycles_fd < 0 && errno == ENOSYS) {
75 pr_debug("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
76 return -1;
77 }
78
79 return cycles_fd;
80}
81
82static u64 get_cycles(void)
83{
84 int ret;
85 u64 clk;
86
87 ret = read(cycles_fd, &clk, sizeof(u64));
88 BUG_ON(ret != sizeof(u64));
89
90 return clk;
91}
92
93static double timeval2double(struct timeval *ts)
94{
95 return (double)ts->tv_sec + (double)ts->tv_usec / (double)USEC_PER_SEC;
96}
97
98#define print_bps(x) do { \
99 if (x < K) \
100 printf(" %14lf bytes/sec\n", x); \
101 else if (x < K * K) \
102 printf(" %14lfd KB/sec\n", x / K); \
103 else if (x < K * K * K) \
104 printf(" %14lf MB/sec\n", x / K / K); \
105 else \
106 printf(" %14lf GB/sec\n", x / K / K / K); \
107 } while (0)
108
109struct bench_mem_info {
110 const struct function *functions;
111 u64 (*do_cycles)(const struct function *r, size_t size, void *src, void *dst);
112 double (*do_gettimeofday)(const struct function *r, size_t size, void *src, void *dst);
113 const char *const *usage;
114 bool alloc_src;
115};
116
117static void __bench_mem_function(struct bench_mem_info *info, int r_idx, size_t size, double size_total)
118{
119 const struct function *r = &info->functions[r_idx];
120 double result_bps = 0.0;
121 u64 result_cycles = 0;
122 void *src = NULL, *dst = zalloc(size);
123
124 printf("# function '%s' (%s)\n", r->name, r->desc);
125
126 if (dst == NULL)
127 goto out_alloc_failed;
128
129 if (info->alloc_src) {
130 src = zalloc(size);
131 if (src == NULL)
132 goto out_alloc_failed;
133 }
134
135 if (bench_format == BENCH_FORMAT_DEFAULT)
136 printf("# Copying %s bytes ...\n\n", size_str);
137
138 if (use_cycles) {
139 result_cycles = info->do_cycles(r, size, src, dst);
140 } else {
141 result_bps = info->do_gettimeofday(r, size, src, dst);
142 }
143
144 switch (bench_format) {
145 case BENCH_FORMAT_DEFAULT:
146 if (use_cycles) {
147 printf(" %14lf cycles/byte\n", (double)result_cycles/size_total);
148 } else {
149 print_bps(result_bps);
150 }
151 break;
152
153 case BENCH_FORMAT_SIMPLE:
154 if (use_cycles) {
155 printf("%lf\n", (double)result_cycles/size_total);
156 } else {
157 printf("%lf\n", result_bps);
158 }
159 break;
160
161 default:
162 BUG_ON(1);
163 break;
164 }
165
166out_free:
167 free(src);
168 free(dst);
169 return;
170out_alloc_failed:
171 printf("# Memory allocation failed - maybe size (%s) is too large?\n", size_str);
172 goto out_free;
173}
174
175static int bench_mem_common(int argc, const char **argv, struct bench_mem_info *info)
176{
177 int i;
178 size_t size;
179 double size_total;
180
181 argc = parse_options(argc, argv, options, info->usage, 0);
182
183 if (use_cycles) {
184 i = init_cycles();
185 if (i < 0) {
186 fprintf(stderr, "Failed to open cycles counter\n");
187 return i;
188 }
189 }
190
191 size = (size_t)perf_atoll((char *)size_str);
192 size_total = (double)size * nr_loops;
193
194 if ((s64)size <= 0) {
195 fprintf(stderr, "Invalid size:%s\n", size_str);
196 return 1;
197 }
198
199 if (!strncmp(function_str, "all", 3)) {
200 for (i = 0; info->functions[i].name; i++)
201 __bench_mem_function(info, i, size, size_total);
202 return 0;
203 }
204
205 for (i = 0; info->functions[i].name; i++) {
206 if (!strcmp(info->functions[i].name, function_str))
207 break;
208 }
209 if (!info->functions[i].name) {
210 if (strcmp(function_str, "help") && strcmp(function_str, "h"))
211 printf("Unknown function: %s\n", function_str);
212 printf("Available functions:\n");
213 for (i = 0; info->functions[i].name; i++) {
214 printf("\t%s ... %s\n",
215 info->functions[i].name, info->functions[i].desc);
216 }
217 return 1;
218 }
219
220 __bench_mem_function(info, i, size, size_total);
221
222 return 0;
223}
224
225static u64 do_memcpy_cycles(const struct function *r, size_t size, void *src, void *dst)
226{
227 u64 cycle_start = 0ULL, cycle_end = 0ULL;
228 memcpy_t fn = r->fn.memcpy;
229 int i;
230
231
232 memset(src, 0, size);
233
234
235
236
237
238 fn(dst, src, size);
239
240 cycle_start = get_cycles();
241 for (i = 0; i < nr_loops; ++i)
242 fn(dst, src, size);
243 cycle_end = get_cycles();
244
245 return cycle_end - cycle_start;
246}
247
248static double do_memcpy_gettimeofday(const struct function *r, size_t size, void *src, void *dst)
249{
250 struct timeval tv_start, tv_end, tv_diff;
251 memcpy_t fn = r->fn.memcpy;
252 int i;
253
254
255
256
257
258 fn(dst, src, size);
259
260 BUG_ON(gettimeofday(&tv_start, NULL));
261 for (i = 0; i < nr_loops; ++i)
262 fn(dst, src, size);
263 BUG_ON(gettimeofday(&tv_end, NULL));
264
265 timersub(&tv_end, &tv_start, &tv_diff);
266
267 return (double)(((double)size * nr_loops) / timeval2double(&tv_diff));
268}
269
270struct function memcpy_functions[] = {
271 { .name = "default",
272 .desc = "Default memcpy() provided by glibc",
273 .fn.memcpy = memcpy },
274
275#ifdef HAVE_ARCH_X86_64_SUPPORT
276# define MEMCPY_FN(_fn, _name, _desc) {.name = _name, .desc = _desc, .fn.memcpy = _fn},
277# include "mem-memcpy-x86-64-asm-def.h"
278# undef MEMCPY_FN
279#endif
280
281 { .name = NULL, }
282};
283
284static const char * const bench_mem_memcpy_usage[] = {
285 "perf bench mem memcpy <options>",
286 NULL
287};
288
289int bench_mem_memcpy(int argc, const char **argv)
290{
291 struct bench_mem_info info = {
292 .functions = memcpy_functions,
293 .do_cycles = do_memcpy_cycles,
294 .do_gettimeofday = do_memcpy_gettimeofday,
295 .usage = bench_mem_memcpy_usage,
296 .alloc_src = true,
297 };
298
299 return bench_mem_common(argc, argv, &info);
300}
301
302static u64 do_memset_cycles(const struct function *r, size_t size, void *src __maybe_unused, void *dst)
303{
304 u64 cycle_start = 0ULL, cycle_end = 0ULL;
305 memset_t fn = r->fn.memset;
306 int i;
307
308
309
310
311
312 fn(dst, -1, size);
313
314 cycle_start = get_cycles();
315 for (i = 0; i < nr_loops; ++i)
316 fn(dst, i, size);
317 cycle_end = get_cycles();
318
319 return cycle_end - cycle_start;
320}
321
322static double do_memset_gettimeofday(const struct function *r, size_t size, void *src __maybe_unused, void *dst)
323{
324 struct timeval tv_start, tv_end, tv_diff;
325 memset_t fn = r->fn.memset;
326 int i;
327
328
329
330
331
332 fn(dst, -1, size);
333
334 BUG_ON(gettimeofday(&tv_start, NULL));
335 for (i = 0; i < nr_loops; ++i)
336 fn(dst, i, size);
337 BUG_ON(gettimeofday(&tv_end, NULL));
338
339 timersub(&tv_end, &tv_start, &tv_diff);
340
341 return (double)(((double)size * nr_loops) / timeval2double(&tv_diff));
342}
343
344static const char * const bench_mem_memset_usage[] = {
345 "perf bench mem memset <options>",
346 NULL
347};
348
349static const struct function memset_functions[] = {
350 { .name = "default",
351 .desc = "Default memset() provided by glibc",
352 .fn.memset = memset },
353
354#ifdef HAVE_ARCH_X86_64_SUPPORT
355# define MEMSET_FN(_fn, _name, _desc) { .name = _name, .desc = _desc, .fn.memset = _fn },
356# include "mem-memset-x86-64-asm-def.h"
357# undef MEMSET_FN
358#endif
359
360 { .name = NULL, }
361};
362
363int bench_mem_memset(int argc, const char **argv)
364{
365 struct bench_mem_info info = {
366 .functions = memset_functions,
367 .do_cycles = do_memset_cycles,
368 .do_gettimeofday = do_memset_gettimeofday,
369 .usage = bench_mem_memset_usage,
370 };
371
372 return bench_mem_common(argc, argv, &info);
373}
374
