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Re: [Qemu-devel] is qemu able to run multiple system emulation simultane

From: Jiahuan Zhang
Subject: Re: [Qemu-devel] is qemu able to run multiple system emulation simultaneously
Date: Fri, 7 Apr 2017 09:08:49 +0200

On 7 April 2017 at 08:26, Jiahuan Zhang <address@hidden> wrote:

> On 6 April 2017 at 19:58, G 3 <address@hidden> wrote:
>> On Apr 6, 2017, at 12:00 PM, address@hidden wrote:
>> Dear QEMU developers,
>>> I need multiple ARM-based hardware emulation runing simultaneously in one
>>> PC.
>>> I wander if QEMU is capble to run two system emulation at the same time.
>>> Or I have to use two QEMU for two system emulation
>>> If the former is possible, where can i find some docs about it? I have
>>> searched two days, the result is not positive.
>>> Please help. Thanks in advance.
>>> Best regards,
>>> Jiahuan
>> My vote goes to running multiple instances of QEMU at the same time. It
>> is easy to do and works.
Just done a try. Multiple system emulation can be done by running multiple
instances of QEMU. You are right! Thanks.

> As for as I know, "running multiple instances of QEMU at the same time"
> is feasible for user-mode emulation, namely emulting CPU, according to
> https://en.wikipedia.org/wiki/QEMU.
> Wikipedia says
> "Virtualization solutions that use QEMU are able to execute multiple
> virtual CPUs in parallel. QEMU is also able to run multiple threads in
> user-mode emulation mode.
> For full system emulation, QEMU uses a single thread to emulate all the
> virtual CPUs and hardware. "
> However, what I need is system emulation, an ARM processor with various
> periphrals.
> I think Peter is right.

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