From: Alexei Starovoitov <ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
To: Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>
Cc: Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Namhyung Kim <namhyung-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Arnaldo Carvalho de Melo
<acme-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Jiri Olsa <jolsa-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Masami Hiramatsu
<masami.hiramatsu.pt-FCd8Q96Dh0JBDgjK7y7TUQ@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Network Development
<netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH v3 linux-trace 4/8] samples: bpf: simple tracing example in C
Date: Mon, 9 Feb 2015 21:47:42 -0800 [thread overview]
Message-ID: <CAMEtUuyCmO+N2SOTNXfOVnRA59TWsZczPCJBWsB+h0E45NxHPA@mail.gmail.com> (raw)
In-Reply-To: <CAMEtUuzon5LfG7PS9YmuW+0GzYMKehz1Ddk+6tXogZOZYdpb3g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Mon, Feb 9, 2015 at 9:45 PM, Alexei Starovoitov <ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org> 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.
next prev parent reply other threads:[~2015-02-10 5:47 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-10 3:45 [PATCH v3 linux-trace 0/8] tracing: attach eBPF programs to tracepoints/syscalls/kprobe Alexei Starovoitov
2015-02-10 3:45 ` [PATCH v3 linux-trace 2/8] tracing: allow eBPF programs to call ktime_get_ns() Alexei Starovoitov
2015-02-10 3:45 ` [PATCH v3 linux-trace 3/8] samples: bpf: simple tracing example in eBPF assembler Alexei Starovoitov
2015-02-10 3:45 ` [PATCH v3 linux-trace 4/8] samples: bpf: simple tracing example in C Alexei Starovoitov
2015-02-10 4:08 ` Steven Rostedt
[not found] ` <20150209230836.7f913c60-2kNGR76GQU9OHLTnHDQRgA@public.gmane.org>
2015-02-10 5:16 ` Steven Rostedt
2015-02-10 5:45 ` Alexei Starovoitov
[not found] ` <CAMEtUuzon5LfG7PS9YmuW+0GzYMKehz1Ddk+6tXogZOZYdpb3g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-02-10 5:47 ` Alexei Starovoitov [this message]
[not found] ` <CAMEtUuyCmO+N2SOTNXfOVnRA59TWsZczPCJBWsB+h0E45NxHPA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-02-10 12:27 ` Steven Rostedt
2015-02-10 12:24 ` Steven Rostedt
[not found] ` <1423539961-21792-5-git-send-email-ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-02-10 4:12 ` Steven Rostedt
[not found] ` <1423539961-21792-1-git-send-email-ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-02-10 3:45 ` [PATCH v3 linux-trace 1/8] tracing: attach eBPF programs to tracepoints and syscalls Alexei Starovoitov
[not found] ` <1423539961-21792-2-git-send-email-ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-02-10 4:46 ` Steven Rostedt
2015-02-10 5:13 ` Steven Rostedt
2015-02-10 3:45 ` [PATCH v3 linux-trace 5/8] samples: bpf: counting example for kfree_skb tracepoint and write syscall Alexei Starovoitov
2015-02-10 14:55 ` [PATCH v3 linux-trace 0/8] tracing: attach eBPF programs to tracepoints/syscalls/kprobe Steven Rostedt
2015-02-10 3:45 ` [PATCH v3 linux-trace 6/8] samples: bpf: IO latency analysis (iosnoop/heatmap) Alexei Starovoitov
2015-02-10 3:46 ` [PATCH v3 linux-trace 7/8] tracing: attach eBPF programs to kprobe/kretprobe Alexei Starovoitov
2015-02-10 3:46 ` [PATCH v3 linux-trace 8/8] samples: bpf: simple kprobe example Alexei Starovoitov
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