| 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 | |