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/* SPDX-License-Identifier: GPL-2.0 */
/*
* A scheduler with every callback defined.
*
* This scheduler defines every callback.
*
* Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
* Copyright (c) 2024 David Vernet <dvernet@meta.com>
*/
#include <scx/common.bpf.h>
char _license[] SEC("license") = "GPL";
s32 BPF_STRUCT_OPS(maximal_select_cpu, struct task_struct *p, s32 prev_cpu,
u64 wake_flags)
{
return prev_cpu;
}
void BPF_STRUCT_OPS(maximal_enqueue, struct task_struct *p, u64 enq_flags)
{
scx_bpf_dispatch(p, SCX_DSQ_GLOBAL, SCX_SLICE_DFL, enq_flags);
}
void BPF_STRUCT_OPS(maximal_dequeue, struct task_struct *p, u64 deq_flags)
{}
void BPF_STRUCT_OPS(maximal_dispatch, s32 cpu, struct task_struct *prev)
{
scx_bpf_consume(SCX_DSQ_GLOBAL);
}
void BPF_STRUCT_OPS(maximal_runnable, struct task_struct *p, u64 enq_flags)
{}
void BPF_STRUCT_OPS(maximal_running, struct task_struct *p)
{}
void BPF_STRUCT_OPS(maximal_stopping, struct task_struct *p, bool runnable)
{}
void BPF_STRUCT_OPS(maximal_quiescent, struct task_struct *p, u64 deq_flags)
{}
bool BPF_STRUCT_OPS(maximal_yield, struct task_struct *from,
struct task_struct *to)
{
return false;
}
bool BPF_STRUCT_OPS(maximal_core_sched_before, struct task_struct *a,
struct task_struct *b)
{
return false;
}
void BPF_STRUCT_OPS(maximal_set_weight, struct task_struct *p, u32 weight)
{}
void BPF_STRUCT_OPS(maximal_set_cpumask, struct task_struct *p,
const struct cpumask *cpumask)
{}
void BPF_STRUCT_OPS(maximal_update_idle, s32 cpu, bool idle)
{}
void BPF_STRUCT_OPS(maximal_cpu_acquire, s32 cpu,
struct scx_cpu_acquire_args *args)
{}
void BPF_STRUCT_OPS(maximal_cpu_release, s32 cpu,
struct scx_cpu_release_args *args)
{}
void BPF_STRUCT_OPS(maximal_cpu_online, s32 cpu)
{}
void BPF_STRUCT_OPS(maximal_cpu_offline, s32 cpu)
{}
s32 BPF_STRUCT_OPS(maximal_init_task, struct task_struct *p,
struct scx_init_task_args *args)
{
return 0;
}
void BPF_STRUCT_OPS(maximal_enable, struct task_struct *p)
{}
void BPF_STRUCT_OPS(maximal_exit_task, struct task_struct *p,
struct scx_exit_task_args *args)
{}
void BPF_STRUCT_OPS(maximal_disable, struct task_struct *p)
{}
s32 BPF_STRUCT_OPS(maximal_cgroup_init, struct cgroup *cgrp,
struct scx_cgroup_init_args *args)
{
return 0;
}
void BPF_STRUCT_OPS(maximal_cgroup_exit, struct cgroup *cgrp)
{}
s32 BPF_STRUCT_OPS(maximal_cgroup_prep_move, struct task_struct *p,
struct cgroup *from, struct cgroup *to)
{
return 0;
}
void BPF_STRUCT_OPS(maximal_cgroup_move, struct task_struct *p,
struct cgroup *from, struct cgroup *to)
{}
void BPF_STRUCT_OPS(maximal_cgroup_cancel_move, struct task_struct *p,
struct cgroup *from, struct cgroup *to)
{}
void BPF_STRUCT_OPS(maximal_cgroup_set_weight, struct cgroup *cgrp, u32 weight)
{}
s32 BPF_STRUCT_OPS_SLEEPABLE(maximal_init)
{
return 0;
}
void BPF_STRUCT_OPS(maximal_exit, struct scx_exit_info *info)
{}
SEC(".struct_ops.link")
struct sched_ext_ops maximal_ops = {
.select_cpu = maximal_select_cpu,
.enqueue = maximal_enqueue,
.dequeue = maximal_dequeue,
.dispatch = maximal_dispatch,
.runnable = maximal_runnable,
.running = maximal_running,
.stopping = maximal_stopping,
.quiescent = maximal_quiescent,
.yield = maximal_yield,
.core_sched_before = maximal_core_sched_before,
.set_weight = maximal_set_weight,
.set_cpumask = maximal_set_cpumask,
.update_idle = maximal_update_idle,
.cpu_acquire = maximal_cpu_acquire,
.cpu_release = maximal_cpu_release,
.cpu_online = maximal_cpu_online,
.cpu_offline = maximal_cpu_offline,
.init_task = maximal_init_task,
.enable = maximal_enable,
.exit_task = maximal_exit_task,
.disable = maximal_disable,
.cgroup_init = maximal_cgroup_init,
.cgroup_exit = maximal_cgroup_exit,
.cgroup_prep_move = maximal_cgroup_prep_move,
.cgroup_move = maximal_cgroup_move,
.cgroup_cancel_move = maximal_cgroup_cancel_move,
.cgroup_set_weight = maximal_cgroup_set_weight,
.init = maximal_init,
.exit = maximal_exit,
.name = "maximal",
};
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