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36adf6fe6c
With commit 08699d20467b6 ("sched_ext: idle: Consolidate default idle
CPU selection kfuncs") allowing scx_bpf_select_cpu_dfl() to be invoked
from multiple contexts, update the test to validate that the kfunc
behaves correctly when used from ops.enqueue() and via BPF test_run.
Additionally, rename the test to enq_select_cpu, dropping "fails" from
the name, as the logic has now been inverted.
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
// 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 "enq_select_cpu.bpf.skel.h"
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#include "scx_test.h"
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static enum scx_test_status setup(void **ctx)
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{
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struct enq_select_cpu *skel;
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skel = enq_select_cpu__open();
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SCX_FAIL_IF(!skel, "Failed to open");
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SCX_ENUM_INIT(skel);
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SCX_FAIL_IF(enq_select_cpu__load(skel), "Failed to 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 int test_select_cpu_from_user(const struct enq_select_cpu *skel)
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{
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int fd, ret;
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__u64 args[1];
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LIBBPF_OPTS(bpf_test_run_opts, attr,
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.ctx_in = args,
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.ctx_size_in = sizeof(args),
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);
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args[0] = getpid();
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fd = bpf_program__fd(skel->progs.select_cpu_from_user);
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if (fd < 0)
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return fd;
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ret = bpf_prog_test_run_opts(fd, &attr);
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if (ret < 0)
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return ret;
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fprintf(stderr, "%s: CPU %d\n", __func__, attr.retval);
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return 0;
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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 enq_select_cpu *skel = ctx;
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struct bpf_link *link;
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link = bpf_map__attach_struct_ops(skel->maps.enq_select_cpu_ops);
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if (!link) {
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SCX_ERR("Failed to attach scheduler");
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return SCX_TEST_FAIL;
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}
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/* Pick an idle CPU from user-space */
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SCX_FAIL_IF(test_select_cpu_from_user(skel), "Failed to pick idle CPU");
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sleep(1);
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SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_NONE));
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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 enq_select_cpu *skel = ctx;
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enq_select_cpu__destroy(skel);
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}
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struct scx_test enq_select_cpu = {
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.name = "enq_select_cpu",
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.description = "Verify scx_bpf_select_cpu_dfl() from multiple contexts",
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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(&enq_select_cpu)
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