linux-kernel - Re: [PATCH] tracing/osnoise: Force quiescent states while tracing

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Message-ID: <9d346a5b-5763-0d82-c06d-a5802b3cb816@kernel.org>
Date:   Tue, 1 Mar 2022 20:53:10 +0100
From:   Daniel Bristot de Oliveira <bristot@...nel.org>
To:     paulmck@...nel.org
Cc:     Nicolas Saenz Julienne <nsaenzju@...hat.com>, rostedt@...dmis.org,
        mingo@...hat.com, linux-kernel@...r.kernel.org, mtosatti@...hat.com
Subject: Re: [PATCH] tracing/osnoise: Force quiescent states while tracing

On 3/1/22 20:46, Paul E. McKenney wrote:
>> But the idea is to see the noise for an user-space application as much as
>> possible (and no, I am not doing application in kernel... but I know people
>> doing it using a unikernel, but that is another story... a longer one... :-)).
> There have been people writing their applications in Linux kernel modules,
> or at least attempting to do so!  ;-)

I have to admit, I once made a kernel application to forward RTP packets for
VoIP communication, between FPGA/DSPs and network with zero-copy. Times were
others, 200MHz of CPU, a single AMBA bus to everybody... fun times :-) But that
is not the case anymore (phew).

-- Daniel