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895669fd0d
In commit 63fb3ec805 ("sched_ext: Allow only user DSQs for
scx_bpf_consume(), scx_bpf_dsq_nr_queued() and bpf_iter_scx_dsq_new()"), we
updated the consume path to only accept user DSQs, thus making it invalid
to consume SCX_DSQ_GLOBAL. This selftest was doing that, so let's create a
custom DSQ and use that instead. The test now passes:
[root@virtme-ng sched_ext]# ./runner -t exit
===== START =====
TEST: exit
DESCRIPTION: Verify we can cleanly exit a scheduler in multiple places
OUTPUT:
[ 12.387229] sched_ext: BPF scheduler "exit" enabled
[ 12.406064] sched_ext: BPF scheduler "exit" disabled (unregistered from BPF)
[ 12.453325] sched_ext: BPF scheduler "exit" enabled
[ 12.474064] sched_ext: BPF scheduler "exit" disabled (unregistered from BPF)
[ 12.515241] sched_ext: BPF scheduler "exit" enabled
[ 12.532064] sched_ext: BPF scheduler "exit" disabled (unregistered from BPF)
[ 12.592063] sched_ext: BPF scheduler "exit" disabled (unregistered from BPF)
[ 12.654063] sched_ext: BPF scheduler "exit" disabled (unregistered from BPF)
[ 12.715062] sched_ext: BPF scheduler "exit" disabled (unregistered from BPF)
ok 1 exit #
===== END =====
Signed-off-by: David Vernet <void@manifault.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
87 lines
1.8 KiB
C
87 lines
1.8 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 <scx/common.bpf.h>
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char _license[] SEC("license") = "GPL";
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#include "exit_test.h"
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const volatile int exit_point;
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UEI_DEFINE(uei);
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#define EXIT_CLEANLY() scx_bpf_exit(exit_point, "%d", exit_point)
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#define DSQ_ID 0
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s32 BPF_STRUCT_OPS(exit_select_cpu, struct task_struct *p,
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s32 prev_cpu, u64 wake_flags)
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{
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bool found;
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if (exit_point == EXIT_SELECT_CPU)
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EXIT_CLEANLY();
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return scx_bpf_select_cpu_dfl(p, prev_cpu, wake_flags, &found);
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}
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void BPF_STRUCT_OPS(exit_enqueue, struct task_struct *p, u64 enq_flags)
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{
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if (exit_point == EXIT_ENQUEUE)
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EXIT_CLEANLY();
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scx_bpf_dispatch(p, DSQ_ID, SCX_SLICE_DFL, enq_flags);
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}
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void BPF_STRUCT_OPS(exit_dispatch, s32 cpu, struct task_struct *p)
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{
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if (exit_point == EXIT_DISPATCH)
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EXIT_CLEANLY();
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scx_bpf_consume(DSQ_ID);
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}
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void BPF_STRUCT_OPS(exit_enable, struct task_struct *p)
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{
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if (exit_point == EXIT_ENABLE)
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EXIT_CLEANLY();
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}
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s32 BPF_STRUCT_OPS(exit_init_task, struct task_struct *p,
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struct scx_init_task_args *args)
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{
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if (exit_point == EXIT_INIT_TASK)
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EXIT_CLEANLY();
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return 0;
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}
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void BPF_STRUCT_OPS(exit_exit, struct scx_exit_info *ei)
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{
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UEI_RECORD(uei, ei);
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}
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s32 BPF_STRUCT_OPS_SLEEPABLE(exit_init)
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{
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if (exit_point == EXIT_INIT)
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EXIT_CLEANLY();
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return scx_bpf_create_dsq(DSQ_ID, -1);
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}
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SEC(".struct_ops.link")
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struct sched_ext_ops exit_ops = {
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.select_cpu = (void *) exit_select_cpu,
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.enqueue = (void *) exit_enqueue,
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.dispatch = (void *) exit_dispatch,
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.init_task = (void *) exit_init_task,
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.enable = (void *) exit_enable,
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.exit = (void *) exit_exit,
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.init = (void *) exit_init,
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.name = "exit",
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.timeout_ms = 1000U,
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};
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