blob: 45204fe0c570bf896af0d2c8a90d846990feb03c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
// 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)
{
__u64 *sample;
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;
}
|
