linux-kernel - Re: perf events over (net) console?

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Date:	Thu, 09 Sep 2010 13:19:01 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Harald Gustafsson <hgu1972@...il.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Harald Gustafsson <harald.gustafsson@...csson.com>,
	Song Yuan <song.yuan@...csson.com>
Subject: Re: perf events over (net) console?

On Thu, 2010-09-09 at 13:06 +0200, Harald Gustafsson wrote:
> Hi,
> 
> We would like to monitor the perf events continuously on a remote
> machine. Does it exist a solution (in the kernel) to direct the output
> to a console or maybe even a netconsole? We would like to avoid a user
> space application to transfer it, due to that the machine will be
> running a test which will heavily load it and we want to avoid as many
> unrelated user space tasks as possible. If not mainlined does anyone
> have a patch for this?

No, and its a daft requirement.

You need a process context anyway to read the data and send it to
whatever place you want it.

Putting that in-kernel serves no purpose what so ever.
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