From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mukesh Rathor <mukesh.rathor@oracle.com>
Subject: Re: alloc_heap_pages is low efficient with more CPUs
Date: Fri, 12 Oct 2012 15:39:25 -0700
Message-ID: <20121012153925.012846e4@mantra.us.oracle.com>
References: <CC9CA725.4EB45%keir@xen.org>
	<201210122024123436447@gmail.com>
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On Fri, 12 Oct 2012 20:24:16 +0800
tupeng212 <tupeng212@gmail.com> wrote:

> With 16 CPUs you find domain startup takes 3s always. 
> :No
> With 16CPUs, first 0.3s, second 3s
> With 64CPUs, first 3s, second 30s.
> 
> With 64 CPUs you find it takes 3s first time, then 30s in future? 
> : Yes

...........

I had seen this a while ago, it was always page scrubbing. That
algoright was changed IIRC, so not sure if still could be the cause.

My 2 cents,
thanks
Mukesh