linux-kernel - Re: [RFC PATCH 0/5] Make eBPF programs output data to perf event

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Message-ID: <20150701115825.GV19282@twins.programming.kicks-ass.net>
Date:	Wed, 1 Jul 2015 13:58:25 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Wangnan (F)" <wangnan0@...wei.com>
Cc:	He Kuang <hekuang@...wei.com>, ast@...mgrid.com,
	rostedt@...dmis.org, masami.hiramatsu.pt@...achi.com,
	mingo@...hat.com, acme@...hat.com, jolsa@...nel.org,
	namhyung@...nel.org, linux-kernel@...r.kernel.org,
	pi3orama <pi3orama@....com>
Subject: Re: [RFC PATCH 0/5] Make eBPF programs output data to perf event

On Wed, Jul 01, 2015 at 02:21:11PM +0800, Wangnan (F) wrote:
> 
> 
> On 2015/7/1 13:44, Peter Zijlstra wrote:
> >On Wed, Jul 01, 2015 at 02:57:30AM +0000, He Kuang wrote:
> >>This patch adds an extra perf trace buffer for other utilities like
> >>bpf to fill extra data to perf events.
> >What!, why?
> 
> The goal of this patchset is to give BPF program a mean to output something
> through
> perf samples.

But why create a separate trace buffer, it should go into the regular
perf buffer.

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