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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
* Copyright (c) 2024 David Vernet <dvernet@meta.com>
*/
#include <bpf/bpf.h>
#include <pthread.h>
#include <scx/common.h>
#include <sys/wait.h>
#include <unistd.h>
#include "maximal.bpf.skel.h"
#include "scx_test.h"
static struct maximal *skel;
static pthread_t threads[2];
bool force_exit = false;
static enum scx_test_status setup(void **ctx)
{
skel = maximal__open_and_load();
if (!skel) {
SCX_ERR("Failed to open and load skel");
return SCX_TEST_FAIL;
}
return SCX_TEST_PASS;
}
static void *do_reload_loop(void *arg)
{
u32 i;
for (i = 0; i < 1024 && !force_exit; i++) {
struct bpf_link *link;
link = bpf_map__attach_struct_ops(skel->maps.maximal_ops);
if (link)
bpf_link__destroy(link);
}
return NULL;
}
static enum scx_test_status run(void *ctx)
{
int err;
void *ret;
err = pthread_create(&threads[0], NULL, do_reload_loop, NULL);
SCX_FAIL_IF(err, "Failed to create thread 0");
err = pthread_create(&threads[1], NULL, do_reload_loop, NULL);
SCX_FAIL_IF(err, "Failed to create thread 1");
SCX_FAIL_IF(pthread_join(threads[0], &ret), "thread 0 failed");
SCX_FAIL_IF(pthread_join(threads[1], &ret), "thread 1 failed");
return SCX_TEST_PASS;
}
static void cleanup(void *ctx)
{
force_exit = true;
maximal__destroy(skel);
}
struct scx_test reload_loop = {
.name = "reload_loop",
.description = "Stress test loading and unloading schedulers repeatedly in a tight loop",
.setup = setup,
.run = run,
.cleanup = cleanup,
};
REGISTER_SCX_TEST(&reload_loop)
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