Re: [Xen-ia64-devel] [PATCH] make MMU setting of domVTi configurable

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

Hi Alex,

Yep, I already have a patch for per domain.
I'll post it after merging to upstream.

We have an interesting result.
We tried some transaction benchmark,
for VHPT size in 512K, 2M, 4M, 8M:
 - Linux is getting a better score (totally 20% up)
 - Windows is getting a worse score (totally 10% down)

Emulating ptc_e is the villain of the piece for Windows.

We'll continue to tune up.

Thanks,
Kouya

Alex Williamson writes:
 > On Fri, 2007-08-10 at 18:23 +0900, Kouya Shimura wrote:
 > > Hi,
 > > 
 > > This patch makes MMU setting of domVTi configurable.
 > > The size of VTLB and VHPT can be set by boot option.
 > > (e.g. "vti_vtlb_size=256k vti_vhpt_size=1m")
 > 
 >    Applied.  It might be interesting if this could be specified per
 > domain.  Please let us know if you characterize better default settings
 > for various guests.  Thanks,
 > 
 >      Alex
 > 
 > -- 
 > Alex Williamson                             HP Open Source & Linux Org.

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