test/sysperf/memcpy.c

   1 /*
   2  * memcpy.c
   3  */
   4
   5 #include "blib.h"
   6
   7 int glob[16384];
   8
   9 void test_using(const char *ctl, char *buf, int bytes, void (*copyf)(const void *s1, void *d, size_t bytes));
  10
  11 #if 0
  12 extern void docopy1(const void *s, void *d, size_t bytes);
  13 extern void docopy2(const void *s, void *d, size_t bytes);
  14 extern void docopy3(const void *s, void *d, size_t bytes);
  15 extern void docopy4(const void *s, void *d, size_t bytes);
  16 extern void docopy5(const void *s, void *d, size_t bytes);
  17 extern void docopy6(const void *s, void *d, size_t bytes);
  18 extern void docopy7(const void *s, void *d, size_t bytes);
  19 extern void fpcleanup(void);
  20 #endif
  21
  22 int
  23 main(int ac, char **av)
  24 {
  25     int bytes;
  26     char *ptr;
  27     char *buf;
  28
  29     if (ac == 1) {
  30         fprintf(stderr, "%s bytes\n", av[0]);
  31         exit(1);
  32     }
  33
  34     bytes = strtol(av[1], &ptr, 0);
  35     switch(*ptr) {
  36     case 'k':
  37     case 'K':
  38         bytes *= 1024;
  39         break;
  40     case 'm':
  41     case 'M':
  42         bytes *= 1024 * 1024;
  43         break;
  44     case 'g':
  45     case 'G':
  46         bytes *= 1024 * 1024 * 1024;
  47         break;
  48     case 0:
  49         break;
  50     default:
  51         fprintf(stderr, "suffix '%s' not understood\n", ptr);
  52         exit(1);
  53     }
  54     if (bytes <= 0 && (bytes & 127)) {
  55         fprintf(stderr, "# of bytes must be a multiple of 128\n");
  56         exit(1);
  57     }
  58     buf = mmap(NULL, bytes * 2, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANON, -1, 0);
  59     if (buf == MAP_FAILED) {
  60         perror("mmap/buffer");
  61         exit(1);
  62     }
  63     bzero(buf, bytes * 2);
  64
  65     test_using("bcopy", buf, bytes, bcopy);
  66 #if 0
  67     test_using("docopy1", buf, bytes, docopy1);
  68     test_using("docopy2", buf, bytes, docopy2);
  69     test_using("docopy3", buf, bytes, docopy3);
  70     test_using("docopy4", buf, bytes, docopy4);
  71     test_using("docopy5", buf, bytes, docopy5);
  72     test_using("docopy6", buf, bytes, docopy6);
  73     test_using("docopy7", buf, bytes, docopy7);
  74 #endif
  75     return(0);
  76 }
  77
  78 void
  79 test_using(const char *ctl, char *buf, int bytes, void (*copyf)(const void *s1, void *d, size_t bytes))
  80 {
  81     int i;
  82     int loops;
  83     long long us;
  84
  85     start_timing();
  86     for (i = 0; (i & 31) || stop_timing(0, NULL) == 0; ++i) {
  87         copyf(buf, buf + bytes, bytes);
  88     }
  89
  90     loops = i * 2;
  91     start_timing();
  92     for (i = loops - 1; i >= 0; --i) {
  93         copyf(buf, buf + bytes, bytes);
  94     }
  95 #if 0
  96     fpcleanup();
  97 #endif
  98     stop_timing(loops, ctl);
  99     us = get_timing();
 100     printf("%s %d %5.2f MBytes/sec\n", ctl, bytes,
 101         (double)loops * (double)bytes / (double)us);
 102 }
 103