12a7c2fffSYonghong Song // SPDX-License-Identifier: GPL-2.0 22a7c2fffSYonghong Song /* Copyright (c) 2020 Facebook */ 32a7c2fffSYonghong Song #include "bpf_iter.h" 42a7c2fffSYonghong Song #include <bpf/bpf_helpers.h> 52a7c2fffSYonghong Song #include <bpf/bpf_tracing.h> 62a7c2fffSYonghong Song 72a7c2fffSYonghong Song char _license[] SEC("license") = "GPL"; 82a7c2fffSYonghong Song 92a7c2fffSYonghong Song struct key_t { 102a7c2fffSYonghong Song int a; 112a7c2fffSYonghong Song int b; 122a7c2fffSYonghong Song int c; 132a7c2fffSYonghong Song }; 142a7c2fffSYonghong Song 152a7c2fffSYonghong Song struct { 162a7c2fffSYonghong Song __uint(type, BPF_MAP_TYPE_PERCPU_HASH); 172a7c2fffSYonghong Song __uint(max_entries, 3); 182a7c2fffSYonghong Song __type(key, struct key_t); 192a7c2fffSYonghong Song __type(value, __u32); 202a7c2fffSYonghong Song } hashmap1 SEC(".maps"); 212a7c2fffSYonghong Song 222a7c2fffSYonghong Song /* will set before prog run */ 232a7c2fffSYonghong Song volatile const __u32 num_cpus = 0; 242a7c2fffSYonghong Song 252a7c2fffSYonghong Song /* will collect results during prog run */ 262a7c2fffSYonghong Song __u32 key_sum_a = 0, key_sum_b = 0, key_sum_c = 0; 272a7c2fffSYonghong Song __u32 val_sum = 0; 282a7c2fffSYonghong Song 292a7c2fffSYonghong Song SEC("iter/bpf_map_elem") dump_bpf_percpu_hash_map(struct bpf_iter__bpf_map_elem * ctx)302a7c2fffSYonghong Songint dump_bpf_percpu_hash_map(struct bpf_iter__bpf_map_elem *ctx) 312a7c2fffSYonghong Song { 322a7c2fffSYonghong Song struct key_t *key = ctx->key; 332a7c2fffSYonghong Song void *pptr = ctx->value; 342a7c2fffSYonghong Song __u32 step; 352a7c2fffSYonghong Song int i; 362a7c2fffSYonghong Song 372a7c2fffSYonghong Song if (key == (void *)0 || pptr == (void *)0) 382a7c2fffSYonghong Song return 0; 392a7c2fffSYonghong Song 402a7c2fffSYonghong Song key_sum_a += key->a; 412a7c2fffSYonghong Song key_sum_b += key->b; 422a7c2fffSYonghong Song key_sum_c += key->c; 432a7c2fffSYonghong Song 442a7c2fffSYonghong Song step = 8; 452a7c2fffSYonghong Song for (i = 0; i < num_cpus; i++) { 462a7c2fffSYonghong Song val_sum += *(__u32 *)pptr; 472a7c2fffSYonghong Song pptr += step; 482a7c2fffSYonghong Song } 492a7c2fffSYonghong Song return 0; 502a7c2fffSYonghong Song } 51