RE: [Xen-devel] [PATCH] speed up shadow of x86_64 Linux guests using 3paging levels

["Li, Xin B" <xin.b.li@xxxxxxxxx>]

>-----Original Message-----
>From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
>[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Li, Xin B
>Sent: 2006年11月15日 0:44
>To: Tim Deegan; Keir Fraser
>Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: [Xen-devel] [PATCH] speed up shadow of x86_64 Linux 
>guests using 3paging levels
>
>Speed up shadow of x86_64 Linux guests using 3 paging levels.
>Linux kernel 2.6.9 or older uses 3 paging levels and its direct map is
>from 0x10000000000.
>

On a UP RHEL4u3 guest, kernel build of defconfig changed from 420s to 370s, 12% 
improved.
On a 4 vCPUs RHEL4u3 guest, kernel build of defconfig changed from 213s to 
121s, 43% improved.

so KB scalability on RHEL4u3 SMP guest is linear like FC5.

-Xin

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