/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <linux/bpf.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <bpf_helpers.h>
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/* Assume max of 1024 CPUs */
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DEFINE_BPF_MAP(cpu_pid_map, ARRAY, int, uint32_t, 1024)
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struct switch_args {
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unsigned long long ignore;
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char prev_comm[16];
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int prev_pid;
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int prev_prio;
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long long prev_state;
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char next_comm[16];
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int next_pid;
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int next_prio;
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};
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SEC("tracepoint/sched/sched_switch")
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int tp_sched_switch(struct switch_args* args) {
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int key;
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uint32_t val;
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key = bpf_get_smp_processor_id();
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val = args->next_pid;
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bpf_cpu_pid_map_update_elem(&key, &val, BPF_ANY);
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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