bpf/profiling/offcpu.h

// Licensed to Apache Software Foundation (ASF) under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Apache Software Foundation (ASF) licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

struct key_t {
    int user_stack_id;
    int kernel_stack_id;
};

struct value_t {
    __u64 counts;
    __u64 deltas;
};

struct {
    __uint(type, BPF_MAP_TYPE_STACK_TRACE);
    __uint(key_size, sizeof(__u32));
    __uint(value_size, 100 * sizeof(__u64));
    __uint(max_entries, 10000);
} stacks SEC(".maps");

struct {
	__uint(type, BPF_MAP_TYPE_LRU_HASH);
	__uint(key_size, sizeof(__u32));
	__uint(value_size, sizeof(__u64));
    __uint(max_entries, 10000);
} starts SEC(".maps");

struct {
	__uint(type, BPF_MAP_TYPE_HASH);
	__type(key, struct key_t);
	__type(value, struct value_t);
	__uint(max_entries, 10000);
} counts SEC(".maps");