perf: Fix endianness argument compatibility with OPT_BOOLEAN() and introduce OPT_INCR()
[linux-3.10.git] / tools / perf / bench / mem-memcpy.c
1 /*
2  * mem-memcpy.c
3  *
4  * memcpy: Simple memory copy in various ways
5  *
6  * Written by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
7  */
8 #include <ctype.h>
9
10 #include "../perf.h"
11 #include "../util/util.h"
12 #include "../util/parse-options.h"
13 #include "../util/header.h"
14 #include "bench.h"
15
16 #include <stdio.h>
17 #include <stdlib.h>
18 #include <string.h>
19 #include <sys/time.h>
20 #include <errno.h>
21
22 #define K 1024
23
24 static const char       *length_str     = "1MB";
25 static const char       *routine        = "default";
26 static bool             use_clock       = false;
27 static int              clock_fd;
28
29 static const struct option options[] = {
30         OPT_STRING('l', "length", &length_str, "1MB",
31                     "Specify length of memory to copy. "
32                     "available unit: B, MB, GB (upper and lower)"),
33         OPT_STRING('r', "routine", &routine, "default",
34                     "Specify routine to copy"),
35         OPT_BOOLEAN('c', "clock", &use_clock,
36                     "Use CPU clock for measuring"),
37         OPT_END()
38 };
39
40 struct routine {
41         const char *name;
42         const char *desc;
43         void * (*fn)(void *dst, const void *src, size_t len);
44 };
45
46 struct routine routines[] = {
47         { "default",
48           "Default memcpy() provided by glibc",
49           memcpy },
50         { NULL,
51           NULL,
52           NULL   }
53 };
54
55 static const char * const bench_mem_memcpy_usage[] = {
56         "perf bench mem memcpy <options>",
57         NULL
58 };
59
60 static struct perf_event_attr clock_attr = {
61         .type           = PERF_TYPE_HARDWARE,
62         .config         = PERF_COUNT_HW_CPU_CYCLES
63 };
64
65 static void init_clock(void)
66 {
67         clock_fd = sys_perf_event_open(&clock_attr, getpid(), -1, -1, 0);
68
69         if (clock_fd < 0 && errno == ENOSYS)
70                 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
71         else
72                 BUG_ON(clock_fd < 0);
73 }
74
75 static u64 get_clock(void)
76 {
77         int ret;
78         u64 clk;
79
80         ret = read(clock_fd, &clk, sizeof(u64));
81         BUG_ON(ret != sizeof(u64));
82
83         return clk;
84 }
85
86 static double timeval2double(struct timeval *ts)
87 {
88         return (double)ts->tv_sec +
89                 (double)ts->tv_usec / (double)1000000;
90 }
91
92 int bench_mem_memcpy(int argc, const char **argv,
93                      const char *prefix __used)
94 {
95         int i;
96         void *dst, *src;
97         size_t length;
98         double bps = 0.0;
99         struct timeval tv_start, tv_end, tv_diff;
100         u64 clock_start, clock_end, clock_diff;
101
102         clock_start = clock_end = clock_diff = 0ULL;
103         argc = parse_options(argc, argv, options,
104                              bench_mem_memcpy_usage, 0);
105
106         tv_diff.tv_sec = 0;
107         tv_diff.tv_usec = 0;
108         length = (size_t)perf_atoll((char *)length_str);
109
110         if ((s64)length <= 0) {
111                 fprintf(stderr, "Invalid length:%s\n", length_str);
112                 return 1;
113         }
114
115         for (i = 0; routines[i].name; i++) {
116                 if (!strcmp(routines[i].name, routine))
117                         break;
118         }
119         if (!routines[i].name) {
120                 printf("Unknown routine:%s\n", routine);
121                 printf("Available routines...\n");
122                 for (i = 0; routines[i].name; i++) {
123                         printf("\t%s ... %s\n",
124                                routines[i].name, routines[i].desc);
125                 }
126                 return 1;
127         }
128
129         dst = zalloc(length);
130         if (!dst)
131                 die("memory allocation failed - maybe length is too large?\n");
132
133         src = zalloc(length);
134         if (!src)
135                 die("memory allocation failed - maybe length is too large?\n");
136
137         if (bench_format == BENCH_FORMAT_DEFAULT) {
138                 printf("# Copying %s Bytes from %p to %p ...\n\n",
139                        length_str, src, dst);
140         }
141
142         if (use_clock) {
143                 init_clock();
144                 clock_start = get_clock();
145         } else {
146                 BUG_ON(gettimeofday(&tv_start, NULL));
147         }
148
149         routines[i].fn(dst, src, length);
150
151         if (use_clock) {
152                 clock_end = get_clock();
153                 clock_diff = clock_end - clock_start;
154         } else {
155                 BUG_ON(gettimeofday(&tv_end, NULL));
156                 timersub(&tv_end, &tv_start, &tv_diff);
157                 bps = (double)((double)length / timeval2double(&tv_diff));
158         }
159
160         switch (bench_format) {
161         case BENCH_FORMAT_DEFAULT:
162                 if (use_clock) {
163                         printf(" %14lf Clock/Byte\n",
164                                (double)clock_diff / (double)length);
165                 } else {
166                         if (bps < K)
167                                 printf(" %14lf B/Sec\n", bps);
168                         else if (bps < K * K)
169                                 printf(" %14lfd KB/Sec\n", bps / 1024);
170                         else if (bps < K * K * K)
171                                 printf(" %14lf MB/Sec\n", bps / 1024 / 1024);
172                         else {
173                                 printf(" %14lf GB/Sec\n",
174                                        bps / 1024 / 1024 / 1024);
175                         }
176                 }
177                 break;
178         case BENCH_FORMAT_SIMPLE:
179                 if (use_clock) {
180                         printf("%14lf\n",
181                                (double)clock_diff / (double)length);
182                 } else
183                         printf("%lf\n", bps);
184                 break;
185         default:
186                 /* reaching this means there's some disaster: */
187                 die("unknown format: %d\n", bench_format);
188                 break;
189         }
190
191         return 0;
192 }