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