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Re: Minimizing qemu causes it to slow down

From: Christopher William Snowhill
Subject: Re: Minimizing qemu causes it to slow down
Date: Wed, 20 Jan 2021 02:01:47 -0800
User-agent: Cyrus-JMAP/3.5.0-alpha0-78-g36b56e88ef-fm-20210120.001-g36b56e88

I think what they're observing, and I may be wrong, is that either their 
desktop environment, or Qemu, or their OS, is de-prioritizing Qemu when it 
loses foreground focus, and causing it to see timer events and processing time 
at a much lower priority than when it is in the foreground.

Alternative suggestion: Try running the VM either as a user mode or system mode 
libvirt guest with Qemu?

On Wed, Jan 20, 2021, at 12:28 AM, gunnar.wagner wrote:
> I am a novice like yourself ... 
> Can it be that the guest OS is going to "hibernate" or "suspend" or so 
> automatically after a defined period of inactivity and you just 
> misinterpret this as kvm/qemu behavior?
> best ... Gunnar
> On 20.01.21 08:20, Asad Ali wrote:
> > I am a novice using qemu to run LUbuntu in a Mac osx host. I used this guide
> > https://graspingtech.com/ubuntu-desktop-18.04-virtual-machine-macos-qemu/
> > 
> > Using this I can run the LUbuntu VM. However, if I minimize the qemu window 
> > or simply not have it as the active window, the vm slows down to a halt. Is 
> > there some way to prevent this?
> > 
> > Signs of slowing down:
> > 1. ssh into the vm from the mac osx host takes a long time.
> > 2. A python script running in the vm monitoring time deltas shows huge 
> > deltas once the "slowdown" kicks in.
> > 
> > 
> > Any help would be very very very appreciated!
> > Asad

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