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Re: Emulate Rpi with QEMU fails

From: Thomas Schneider
Subject: Re: Emulate Rpi with QEMU fails
Date: Wed, 7 Oct 2020 09:27:23 +0200
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.3.1


I already considered the host CPU power.
However I have this <https://ark.intel.com/content/www/us/en/ark/products/33924/intel-core-2-quad-processor-q9550-12m-cache-2-83-ghz-1333-mhz-fsb.html> CPU
Intel Core 2 Quad Q9550 2,83 GHz
and assumed this should be powerful enough for RPi emulation.

But maybe my assumption was too optimistic.

Am 07.10.2020 um 08:50 schrieb Paul Zimmerman:
On Tue, Oct 6, 2020 at 11:28 PM Thomas <74cmonty@gmail.com> wrote:

Many thanks for your support.

I managed to get emulated RPi starting.

However there's one question I want to ask:
How can I accelerate the startup sequence?
I mean booting the emulated RPi takes more than 3 minutes.

Get a faster computer? ;)

On my Intel i7 desktop it takes about 40 seconds to boot to the login:
prompt on the serial console, and about 1 min 8 seconds before the
GUI is up. On my 5 year old laptop it's probably twice that. I don't know
of any way to make it go faster.

- Paul

Am 06.10.20 um 11:58 schrieb Alex Bennée:
Thomas Schneider <74cmonty@gmail.com> writes:

Hello Paul,

many thanks for sharing this info.

Can you confirm that the emulated RPi with your command will use
"internal QEMU" network, means the client cannot be accessed from any
other device in LAN?
The support for user-mode and TAP networking is orthogonal to the
emulated device. However if you only want a few ports it's quite easy to
use port forwarding, e.g:

   -netdev user,id=unet,hostfwd=tcp::2222-:22

which forwards 2222 to port 22 on the device. I have an alias in
.ssh/config for accessing my QEMU devices.

If yes, what is required to setup a TAP connected to host's network
I'll defer to others for this but generally when I want proper bridged
networking for a VM I use virt-manager/libvirt to configure it because
it can be quite fiddly to do by hand.

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