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// SPDX-License-Identifier: GPL-2.0
// Carsten Haitzler <carsten.haitzler@arm.com>, 2021
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
struct args {
unsigned long loops;
unsigned long size;
pthread_t th;
void *ret;
};
static void *thrfn(void *arg)
{
struct args *a = arg;
unsigned long i, len = a->loops;
unsigned char *src, *dst;
src = malloc(a->size * 1024);
dst = malloc(a->size * 1024);
if ((!src) || (!dst)) {
printf("ERR: Can't allocate memory\n");
exit(1);
}
for (i = 0; i < len; i++)
memcpy(dst, src, a->size * 1024);
}
static pthread_t new_thr(void *(*fn) (void *arg), void *arg)
{
pthread_t t;
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_create(&t, &attr, fn, arg);
return t;
}
int main(int argc, char **argv)
{
unsigned long i, len, size, thr;
struct args args[256];
long long v;
if (argc < 4) {
printf("ERR: %s [copysize Kb] [numthreads] [numloops (hundreds)]\n", argv[0]);
exit(1);
}
v = atoll(argv[1]);
if ((v < 1) || (v > (1024 * 1024))) {
printf("ERR: max memory 1GB (1048576 KB)\n");
exit(1);
}
size = v;
thr = atol(argv[2]);
if ((thr < 1) || (thr > 256)) {
printf("ERR: threads 1-256\n");
exit(1);
}
v = atoll(argv[3]);
if ((v < 1) || (v > 40000000000ll)) {
printf("ERR: loops 1-40000000000 (hundreds)\n");
exit(1);
}
len = v * 100;
for (i = 0; i < thr; i++) {
args[i].loops = len;
args[i].size = size;
args[i].th = new_thr(thrfn, &(args[i]));
}
for (i = 0; i < thr; i++)
pthread_join(args[i].th, &(args[i].ret));
return 0;
}
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