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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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5ae5161820
Add a selftest to validate the behavior of the NUMA-aware scheduler functionalities, including idle CPU selection within nodes, per-node DSQs and CPU to node mapping. Signed-off-by: Andrea Righi <arighi@nvidia.com> Signed-off-by: Tejun Heo <tj@kernel.org>
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2025 Andrea Righi <arighi@nvidia.com>
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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 "numa.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 numa *skel;
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skel = numa__open();
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SCX_FAIL_IF(!skel, "Failed to open");
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SCX_ENUM_INIT(skel);
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skel->rodata->__COMPAT_SCX_PICK_IDLE_IN_NODE = SCX_PICK_IDLE_IN_NODE;
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skel->struct_ops.numa_ops->flags = SCX_OPS_BUILTIN_IDLE_PER_NODE;
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SCX_FAIL_IF(numa__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 enum scx_test_status run(void *ctx)
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{
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struct numa *skel = ctx;
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struct bpf_link *link;
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link = bpf_map__attach_struct_ops(skel->maps.numa_ops);
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SCX_FAIL_IF(!link, "Failed to attach scheduler");
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/* Just sleeping is fine, plenty of scheduling events happening */
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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 numa *skel = ctx;
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numa__destroy(skel);
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}
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struct scx_test numa = {
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.name = "numa",
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.description = "Verify NUMA-aware functionalities",
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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(&numa)
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