brintos

brintos / linux-shallow public Read only

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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * A scheduler that verifies that we do proper counting of init, enable, etc4 * callbacks.5 *6 * Copyright (c) 2023 Meta Platforms, Inc. and affiliates.7 * Copyright (c) 2023 David Vernet <dvernet@meta.com>8 * Copyright (c) 2023 Tejun Heo <tj@kernel.org>9 */10 11#include <scx/common.bpf.h>12 13char _license[] SEC("license") = "GPL";14 15u64 init_task_cnt, exit_task_cnt, enable_cnt, disable_cnt;16u64 init_fork_cnt, init_transition_cnt;17 18s32 BPF_STRUCT_OPS_SLEEPABLE(cnt_init_task, struct task_struct *p,19			     struct scx_init_task_args *args)20{21	__sync_fetch_and_add(&init_task_cnt, 1);22 23	if (args->fork)24		__sync_fetch_and_add(&init_fork_cnt, 1);25	else26		__sync_fetch_and_add(&init_transition_cnt, 1);27 28	return 0;29}30 31void BPF_STRUCT_OPS(cnt_exit_task, struct task_struct *p)32{33	__sync_fetch_and_add(&exit_task_cnt, 1);34}35 36void BPF_STRUCT_OPS(cnt_enable, struct task_struct *p)37{38	__sync_fetch_and_add(&enable_cnt, 1);39}40 41void BPF_STRUCT_OPS(cnt_disable, struct task_struct *p)42{43	__sync_fetch_and_add(&disable_cnt, 1);44}45 46SEC(".struct_ops.link")47struct sched_ext_ops init_enable_count_ops = {48	.init_task	= (void *) cnt_init_task,49	.exit_task	= (void *) cnt_exit_task,50	.enable		= (void *) cnt_enable,51	.disable	= (void *) cnt_disable,52	.name		= "init_enable_count",53};54