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// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <limits.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/compiler.h>
#include "../tests.h"
#define MAX_THREADS 25
static int iterations = 500;
int named_threads_work = 1234;
typedef void *(*thread_fn_t)(void *);
#define DEFINE_THREAD(n) \
noinline void *named_threads_thread##n(void *arg __maybe_unused) \
{ \
pthread_setname_np(pthread_self(), "thread" #n); \
for (int i = 0; i < iterations; i++) \
named_threads_work += 3; \
\
return NULL; \
}
#define THREAD_LIST(macro) \
macro(1) \
macro(2) \
macro(3) \
macro(4) \
macro(5) \
macro(6) \
macro(7) \
macro(8) \
macro(9) \
macro(10) \
macro(11) \
macro(12) \
macro(13) \
macro(14) \
macro(15) \
macro(16) \
macro(17) \
macro(18) \
macro(19) \
macro(20) \
macro(21) \
macro(22) \
macro(23) \
macro(24) \
macro(25)
#define DECLARE_THREAD(n) void *named_threads_thread##n(void *arg);
THREAD_LIST(DECLARE_THREAD)
THREAD_LIST(DEFINE_THREAD)
#define THREAD_ENTRY(n) named_threads_thread##n,
static thread_fn_t thread_fns[MAX_THREADS] = {
THREAD_LIST(THREAD_ENTRY)
};
/*
* Creates argv[0] threads that run a unique function named "thread[x]" which performs
* a multiplication in a loop for argv[1] loops.
*/
static int named_threads(int argc, const char **argv)
{
pthread_t threads[MAX_THREADS];
int nr_threads = 1;
int err = 0;
if (argc > 0)
nr_threads = atoi(argv[0]);
if (nr_threads <= 0 || nr_threads > MAX_THREADS) {
fprintf(stderr, "Error: num threads must be 1 - %d\n", MAX_THREADS);
return 1;
}
if (argc > 1)
iterations = atoi(argv[1]);
if (iterations < 0) {
fprintf(stderr, "Error: iterations must be non-negative\n");
return 1;
}
for (int i = 0; i < nr_threads; i++) {
int ret;
ret = pthread_create(&threads[i], NULL, thread_fns[i], NULL);
if (ret) {
fprintf(stderr, "Error: failed to create thread%d: %s\n",
i + 1, strerror(ret));
return 1;
}
}
for (int i = 0; i < nr_threads; i++)
pthread_join(threads[i], NULL);
return err;
}
DEFINE_WORKLOAD(named_threads);
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