# Re: \[PATCH v3 linux-trace 4/8\] samples: bpf: simple tracing example in C

- From: Alexei Starovoitov \<hidden\>
- Date: 2015-02-10 05:48:05 
- List: netdev
- Page: https://ratatoskr.run/netdev/2015/02/4428660
- Thread: https://ratatoskr.run/linux-api/2015/02/4428614/t.md

```text
On Mon, Feb 9, 2015 at 9:45 PM, Alexei Starovoitov [ref] wrote:
> I thought we already stated that.
> Here is the quote from perf_event.h:
>          *      # The RAW record below is opaque data wrt the ABI
>          *      #
>          *      # That is, the ABI doesn't make any promises wrt to
>          *      # the stability of its content, it may vary depending
>          *      # on event, hardware, kernel version and phase of
>          *      # the moon.
>          *      #
>          *      # In other words, PERF_SAMPLE_RAW contents are not an ABI.
>
> and this example is reading PERF_SAMPLE_RAW events and
> uses locally defined structs to print them for simplicity.

to underline my point once more:
addition of bpf doesn't change at all what PERF_SAMPLE_RAW already
delivers to user space.
so no new ABIs anywhere.
```