// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Facebook

#include <linux/bpf.h>
#include <stdint.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"

char _license[] SEC("license") = "GPL";

struct {
        __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
        __uint(value_size, sizeof(int));
        __uint(key_size, sizeof(int));
} perfbuf SEC(".maps");

const volatile int batch_cnt = 0;

long sample_val = 42;
long dropped __attribute__((aligned(128))) = 0;

SEC("fentry/" SYS_PREFIX "sys_getpgid")
int bench_perfbuf(void *ctx)
{
        int i;

        for (i = 0; i < batch_cnt; i++) {
                if (bpf_perf_event_output(ctx, &perfbuf, BPF_F_CURRENT_CPU,
                                          &sample_val, sizeof(sample_val)))
                        __sync_add_and_fetch(&dropped, 1);
        }
        return 0;
}