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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
#include <test_progs.h>
#include <network_helpers.h>
#include <sys/sysinfo.h>
struct __qspinlock { int val; };
typedef struct __qspinlock arena_spinlock_t;
struct arena_qnode {
unsigned long next;
int count;
int locked;
};
#include "arena_spin_lock.skel.h"
static long cpu;
static int repeat;
pthread_barrier_t barrier;
static void *spin_lock_thread(void *arg)
{
int err, prog_fd = *(u32 *)arg;
LIBBPF_OPTS(bpf_test_run_opts, topts,
.data_in = &pkt_v4,
.data_size_in = sizeof(pkt_v4),
.repeat = repeat,
);
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
CPU_SET(__sync_fetch_and_add(&cpu, 1), &cpuset);
ASSERT_OK(pthread_setaffinity_np(pthread_self(), sizeof(cpuset), &cpuset), "cpu affinity");
err = pthread_barrier_wait(&barrier);
if (err != PTHREAD_BARRIER_SERIAL_THREAD && err != 0)
ASSERT_FALSE(true, "pthread_barrier");
err = bpf_prog_test_run_opts(prog_fd, &topts);
ASSERT_OK(err, "test_run err");
ASSERT_EQ((int)topts.retval, 0, "test_run retval");
pthread_exit(arg);
}
static void test_arena_spin_lock_size(int size)
{
LIBBPF_OPTS(bpf_test_run_opts, topts);
struct arena_spin_lock *skel;
pthread_t thread_id[16];
int prog_fd, i, err;
int nthreads;
void *ret;
nthreads = MIN(get_nprocs(), ARRAY_SIZE(thread_id));
if (nthreads < 2) {
test__skip();
return;
}
skel = arena_spin_lock__open_and_load();
if (!ASSERT_OK_PTR(skel, "arena_spin_lock__open_and_load"))
return;
if (skel->data->test_skip == 2) {
test__skip();
goto end;
}
skel->bss->cs_count = size;
skel->bss->limit = repeat * nthreads;
ASSERT_OK(pthread_barrier_init(&barrier, NULL, nthreads), "barrier init");
prog_fd = bpf_program__fd(skel->progs.prog);
for (i = 0; i < nthreads; i++) {
err = pthread_create(&thread_id[i], NULL, &spin_lock_thread, &prog_fd);
if (!ASSERT_OK(err, "pthread_create"))
goto end_barrier;
}
for (i = 0; i < nthreads; i++) {
if (!ASSERT_OK(pthread_join(thread_id[i], &ret), "pthread_join"))
goto end_barrier;
if (!ASSERT_EQ(ret, &prog_fd, "ret == prog_fd"))
goto end_barrier;
}
ASSERT_EQ(skel->bss->counter, repeat * nthreads, "check counter value");
end_barrier:
pthread_barrier_destroy(&barrier);
end:
arena_spin_lock__destroy(skel);
return;
}
void test_arena_spin_lock(void)
{
repeat = 1000;
if (test__start_subtest("arena_spin_lock_1"))
test_arena_spin_lock_size(1);
cpu = 0;
if (test__start_subtest("arena_spin_lock_1000"))
test_arena_spin_lock_size(1000);
cpu = 0;
repeat = 100;
if (test__start_subtest("arena_spin_lock_50000"))
test_arena_spin_lock_size(50000);
}
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