Re: [PATCH v3 3/3] samples/bpf: example of get selected PMU counter value

Alexei Starovoitov
2015-07-23T23:00:00Z

On 7/23/15 2:42 AM, Kaixu Xia wrote:
> This is a simple example and shows how to use the new ability
> to get the selected Hardware PMU counter value.
>
> Signed-off-by: Kaixu Xia <xiakaixu@huawei.com>
...
> +struct bpf_map_def SEC("maps") my_map = {
> + .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
> + .key_size = sizeof(int),
> + .value_size = sizeof(unsigned long),
> + .max_entries = 32,
> +};

wait. how did it work here? value_size should be u32.