1 // SPDX-License-Identifier: GPL-2.0
2 // Carsten Haitzler <carsten.haitzler@arm.com>, 2021
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <unistd.h>
6 #include <string.h>
7 #include <pthread.h>
8
9 struct args {
10 unsigned long loops;
11 unsigned long size;
12 pthread_t th;
13 void *ret;
14 };
15
16 static void *thrfn(void *arg)
17 {
18 struct args *a = arg;
19 unsigned long i, len = a->loops;
20 unsigned char *src, *dst;
21
22 src = malloc(a->size * 1024);
23 dst = malloc(a->size * 1024);
24 if ((!src) || (!dst)) {
25 printf("ERR: Can't allocate memory\n");
26 exit(1);
27 }
28 for (i = 0; i < len; i++)
29 memcpy(dst, src, a->size * 1024);
30 }
31
32 static pthread_t new_thr(void *(*fn) (void *arg), void *arg)
33 {
34 pthread_t t;
35 pthread_attr_t attr;
36
37 pthread_attr_init(&attr);
38 pthread_create(&t, &attr, fn, arg);
39 return t;
40 }
41
42 int main(int argc, char **argv)
43 {
44 unsigned long i, len, size, thr;
45 struct args args[256];
46 long long v;
47
48 if (argc < 4) {
49 printf("ERR: %s [copysize Kb] [numthreads] [numloops (hundreds)]\n", argv[0]);
50 exit(1);
51 }
52
53 v = atoll(argv[1]);
54 if ((v < 1) || (v > (1024 * 1024))) {
55 printf("ERR: max memory 1GB (1048576 KB)\n");
56 exit(1);
57 }
58 size = v;
59 thr = atol(argv[2]);
60 if ((thr < 1) || (thr > 256)) {
61 printf("ERR: threads 1-256\n");
62 exit(1);
63 }
64 v = atoll(argv[3]);
65 if ((v < 1) || (v > 40000000000ll)) {
66 printf("ERR: loops 1-40000000000 (hundreds)\n");
67 exit(1);
68 }
69 len = v * 100;
70 for (i = 0; i < thr; i++) {
71 args[i].loops = len;
72 args[i].size = size;
73 args[i].th = new_thr(thrfn, &(args[i]));
74 }
75 for (i = 0; i < thr; i++)
76 pthread_join(args[i].th, &(args[i].ret));
77 return 0;
78 }
79
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