loop3.c

 1// SPDX-License-Identifier: GPL-2.0
 2// Copyright (c) 2019 Facebook
 3#include "vmlinux.h"
 4#include <bpf/bpf_helpers.h>
 5#include <bpf/bpf_tracing.h>
 6
 7char _license[] SEC("license") = "GPL";
 8
 9SEC("raw_tracepoint/consume_skb")
10int while_true(struct pt_regs *ctx)
11{
12	volatile __u64 i = 0, sum = 0;
13	do {
14		i++;
15		sum += PT_REGS_RC(ctx);
16	} while (i < 0x100000000ULL);
17	return sum;
18}