Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
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* Copyright (c) 2024 David Vernet <dvernet@meta.com>
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*/
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#include <bpf/bpf.h>
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#include <sched.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 "exit.bpf.skel.h"
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#include "scx_test.h"
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#include "exit_test.h"
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static enum scx_test_status run(void *ctx)
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{
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enum exit_test_case tc;
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for (tc = 0; tc < NUM_EXITS; tc++) {
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struct exit *skel;
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struct bpf_link *link;
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char buf[16];
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/*
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* On single-CPU systems, ops.select_cpu() is never
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* invoked, so skip this test to avoid getting stuck
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* indefinitely.
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*/
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if (tc == EXIT_SELECT_CPU && libbpf_num_possible_cpus() == 1)
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continue;
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skel = exit__open();
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SCX_ENUM_INIT(skel);
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skel->rodata->exit_point = tc;
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exit__load(skel);
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link = bpf_map__attach_struct_ops(skel->maps.exit_ops);
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if (!link) {
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SCX_ERR("Failed to attach scheduler");
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exit__destroy(skel);
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return SCX_TEST_FAIL;
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}
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/* Assumes uei.kind is written last */
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while (skel->data->uei.kind == EXIT_KIND(SCX_EXIT_NONE))
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sched_yield();
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SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_UNREG_BPF));
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SCX_EQ(skel->data->uei.exit_code, tc);
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sprintf(buf, "%d", tc);
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SCX_ASSERT(!strcmp(skel->data->uei.msg, buf));
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bpf_link__destroy(link);
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exit__destroy(skel);
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}
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return SCX_TEST_PASS;
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}
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struct scx_test exit_test = {
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.name = "exit",
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.description = "Verify we can cleanly exit a scheduler in multiple places",
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.run = run,
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};
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REGISTER_SCX_TEST(&exit_test)
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