// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2020 Facebook */ #include <vmlinux.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> char _license[] SEC("license") = "GPL"; struct key_t { int a; int b; int c; }; struct { __uint(type, BPF_MAP_TYPE_PERCPU_HASH); __uint(max_entries, 3); __type(key, struct key_t); __type(value, __u32); } hashmap1 SEC(".maps"); /* will set before prog run */ volatile const __s32 num_cpus = 0; /* will collect results during prog run */ __u32 key_sum_a = 0, key_sum_b = 0, key_sum_c = 0; __u32 val_sum = 0; SEC("iter/bpf_map_elem") int dump_bpf_percpu_hash_map(struct bpf_iter__bpf_map_elem *ctx) { struct key_t *key = ctx->key; void *pptr = ctx->value; __u32 step; int i; if (key == (void *)0 || pptr == (void *)0) return 0; key_sum_a += key->a; key_sum_b += key->b; key_sum_c += key->c; step = 8; for (i = 0; i < num_cpus; i++) { val_sum += *(__u32 *)pptr; pptr += step; } return 0; }