How to test with low RAM and just one CPU core (was: Re: Chromium vs Firefox : Need testimonies )

[Phill Whiteside]

Hi Jonathan,

you can also utilise the abilities built into the linux kernel. I know at
times I seem like a fan boi of virt-manager, but it is a GUI that uses the
kvm abilities that are in built to the linux kernel. I'm sure the purists
will prefer using virsh exactly, but I do ask why we need to learn so much
command line stuff :)

Regards,

Phill.

On 1 June 2013 03:17, Jonathan Marsden <jmarsden at fastmail.fm> wrote:

> On 05/31/2013 05:47 PM, Andre Rodovalho wrote:
>
> > I cannot test lubuntu with such low specs... But I have already used
> > lubuntu with several Celeron D processors, and about 1gb.
>
> You can boot with a kernel parameter
>
>   mem=512M
>
> or
>
>   mem=384M
>
> or even
>
>   mem=256M
>
> so the kernel will only use that much of your RAM, so userland Linux
> programs (like Chromium and Firefox) will then not even know the rest of
> your RAM exists!  This makes testing the "low RAM" case trivial.
>
> In the same way, you can temporarily turn a multi-core CPU into a
> single-core one by adding the parameter
>
>   nosmp
>
> Together, those two options let you run your machine with less CPU and
> less RAM that it really has, for testing purposes.  Just edit the kernel
> line temporarily from the GRUB menu when you boot.
>
> Jonathan
>
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