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Re: [Xen-devel] vif tx drops

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] vif tx drops
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Wed, 13 Oct 2004 21:59:31 +0100
Cc: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>, David Becker <becker@xxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
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> > > 
> > > "  But the random-number generator is crap.
> > > 
> > > I'll say.  Out of 55 recently created VMs, 15 got dup mac addrs.
> > >     count addr
> 
> > You could try adding the following ahead of the above code in
> > tools/python/xen/xm/create.py:
> > 
> > random.seed(time.time())
> > 
> > (you may need to add an 'import time' at the top of the file).
> 
> Yes, this is worth a try. 
> 
> I've experimented with random.randint() but I am totally unable to
> make it perform so abysmally as to generate 15 dupes in 55 selections
> from a space of 8 million. I'm getting about 1 dupe every 2000
> selections. 
> 
>  -- Keir

Actually theg change is trivial ('random.seed()') so I checked it
in. Hopefully it will avoid embarrassingly bad 'random' choices.

 -- Keir


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