Re: [uml-user] recommended host linux 64bit/32bit

[Blaisorblade <bla...@ya...>]

On Saturday 01 April 2006 18:02, David Arendt wrote:
> Hi,
>
> I am migrating my dedicated server to a Pentium D820 2.8 ghz CPU (dual
> core). This cpu supports EM64T. This machine would only be used to run
> user-mode linuxes. No software (except ssh) would run on the host linux.
> As skas3 seems to be not fully supported on 64bit systems, would you
> suggest installing a 32-bit or a 64-bit linux as host. Will skas3
> support for 64-bit host linux soon be fully supported ?

Well, we've just discovered that the most important part (for performance) of 
SKAS3 *is* supported (instead of "mode=skas0"/"skas0" pass simply "noprocmm", 
the UML will run happily).

I don't have data about the performance loss, but I think on this side it'd be 
not big.

However, the SYSEMU code isn't implemented for x86_64. And that is a bigger 
problem indeed for performance. Look at the end of

http://sysemu.sourceforge.net/

But ignore the "60%" number since it's a micro-benchmark (i.e. unlikely to 
represent a real application). The 33% one is more realistic.

> I am asking this 
> because due to the fact the server is running at a remote location,
> having someone installing me another host os would be costly.

-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade

	

	
		
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