RE: [Xen-ia64-devel] [PATCH] [Resend]Enable hash vtlb

[Alex Williamson <alex.williamson@xxxxxx>]

On Mon, 2006-04-10 at 09:09 +0800, Xu, Anthony wrote:
> Hi Alex,
> Sorry for not clear.
> You need to apply three patches I sent before applying this one.
> They are,
> 1. get_pfn_list workaround.
> 2. warning fix
> 3. access reflect fix
> I attach these three patches.

Hi Anthony,

   Thanks, I applied all the patches to my test tree and am able to
boot.  However, I'm not able to reproduce the performance increase for
domU.  I see a performance decrease across the board (including a
significant increase in system time).  Here are my results:

System:
   HP zx6000
   10GB RAM (7GB available to xen using max_addr=10G)
   2x1.3GHz Mad6M

(results below are the best time from 2 runs)

bare metal (UP):
   1829s (56.6s system) baseline

dom0 w/o hash vtlb:
   1928s (64.4s system) +5.4% (+13.7% system)

domU w/o hash vtlb
   1877s (63.8s system) +2.6% (+12.7% system)

dom0 w/ hash vtlb
   1986s (86.3s system) +8.6% (+52.5% system)

domU w/ hash vtlb
   1932s (84.2s system) +5.6% (+48.8% system)

Is the performance increase reproducible on your system?  Can you
provide the system specs?  Can anyone else verify performance with and
without this patch set on their system?  Thanks,

        Alex

-- 
Alex Williamson                             HP Linux & Open Source Lab


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