160dd49eaSYonghong Song // SPDX-License-Identifier: GPL-2.0 260dd49eaSYonghong Song /* Copyright (c) 2020 Facebook */ 360dd49eaSYonghong Song #include "bpf_iter.h" 460dd49eaSYonghong Song #include <bpf/bpf_helpers.h> 560dd49eaSYonghong Song #include <bpf/bpf_tracing.h> 660dd49eaSYonghong Song 760dd49eaSYonghong Song char _license[] SEC("license") = "GPL"; 860dd49eaSYonghong Song 960dd49eaSYonghong Song struct key_t { 1060dd49eaSYonghong Song int a; 1160dd49eaSYonghong Song int b; 1260dd49eaSYonghong Song int c; 1360dd49eaSYonghong Song }; 1460dd49eaSYonghong Song 1560dd49eaSYonghong Song struct { 1660dd49eaSYonghong Song __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); 1760dd49eaSYonghong Song __uint(max_entries, 3); 1860dd49eaSYonghong Song __type(key, __u32); 1960dd49eaSYonghong Song __type(value, __u32); 2060dd49eaSYonghong Song } arraymap1 SEC(".maps"); 2160dd49eaSYonghong Song 2260dd49eaSYonghong Song /* will set before prog run */ 2360dd49eaSYonghong Song volatile const __u32 num_cpus = 0; 2460dd49eaSYonghong Song 2560dd49eaSYonghong Song __u32 key_sum = 0, val_sum = 0; 2660dd49eaSYonghong Song 2760dd49eaSYonghong Song SEC("iter/bpf_map_elem") dump_bpf_percpu_array_map(struct bpf_iter__bpf_map_elem * ctx)2860dd49eaSYonghong Songint dump_bpf_percpu_array_map(struct bpf_iter__bpf_map_elem *ctx) 2960dd49eaSYonghong Song { 3060dd49eaSYonghong Song __u32 *key = ctx->key; 3160dd49eaSYonghong Song void *pptr = ctx->value; 3260dd49eaSYonghong Song __u32 step; 3360dd49eaSYonghong Song int i; 3460dd49eaSYonghong Song 3560dd49eaSYonghong Song if (key == (void *)0 || pptr == (void *)0) 3660dd49eaSYonghong Song return 0; 3760dd49eaSYonghong Song 3860dd49eaSYonghong Song key_sum += *key; 3960dd49eaSYonghong Song 4060dd49eaSYonghong Song step = 8; 4160dd49eaSYonghong Song for (i = 0; i < num_cpus; i++) { 4260dd49eaSYonghong Song val_sum += *(__u32 *)pptr; 4360dd49eaSYonghong Song pptr += step; 4460dd49eaSYonghong Song } 4560dd49eaSYonghong Song return 0; 4660dd49eaSYonghong Song } 47