71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2023 Meta Platforms, Inc. and affiliates.
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* Copyright (c) 2023 David Vernet <dvernet@meta.com>
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* Copyright (c) 2023 Tejun Heo <tj@kernel.org>
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*/
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#include <bpf/bpf.h>
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#include <scx/common.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "select_cpu_dispatch.bpf.skel.h"
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#include "scx_test.h"
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#define NUM_CHILDREN 1028
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static enum scx_test_status setup(void **ctx)
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{
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struct select_cpu_dispatch *skel;
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skel = select_cpu_dispatch__open_and_load();
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SCX_FAIL_IF(!skel, "Failed to open and load skel");
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*ctx = skel;
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return SCX_TEST_PASS;
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}
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static enum scx_test_status run(void *ctx)
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{
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struct select_cpu_dispatch *skel = ctx;
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struct bpf_link *link;
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pid_t pids[NUM_CHILDREN];
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int i, status;
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link = bpf_map__attach_struct_ops(skel->maps.select_cpu_dispatch_ops);
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SCX_FAIL_IF(!link, "Failed to attach scheduler");
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for (i = 0; i < NUM_CHILDREN; i++) {
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pids[i] = fork();
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if (pids[i] == 0) {
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sleep(1);
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exit(0);
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}
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}
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for (i = 0; i < NUM_CHILDREN; i++) {
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SCX_EQ(waitpid(pids[i], &status, 0), pids[i]);
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SCX_EQ(status, 0);
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}
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bpf_link__destroy(link);
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return SCX_TEST_PASS;
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}
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static void cleanup(void *ctx)
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{
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struct select_cpu_dispatch *skel = ctx;
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select_cpu_dispatch__destroy(skel);
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}
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struct scx_test select_cpu_dispatch = {
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.name = "select_cpu_dispatch",
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.description = "Test direct dispatching to built-in DSQs from "
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"ops.select_cpu()",
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.setup = setup,
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.run = run,
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.cleanup = cleanup,
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};
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REGISTER_SCX_TEST(&select_cpu_dispatch)
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