From: Andrew Theurer <habanero@us.ibm.com>
To: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>
Cc: xen-devel@lists.xensource.com, "Nakajima, Jun" <jun.nakajima@intel.com>
Subject: Re: [PATCH] Optimizing x86-64 xenlinux using global pagesfor user mode (take 2)
Date: Wed, 30 Aug 2006 09:35:23 -0500 [thread overview]
Message-ID: <44F5A22B.7050403@us.ibm.com> (raw)
In-Reply-To: <A95E2296287EAD4EB592B5DEEFCE0E9D5725D2@liverpoolst.ad.cl.cam.ac.uk>
Ian Pratt wrote:
>> The previous patch had a problem with the builder, which constructs the
>> initial page tables with the USER bit on. And Xen couldn't distinguish
>> kernel or use pages. It was partially checked avoiding the bug, and it's
>> finished with this patch.
>
> Thanks. Have you any updated benchmark numbers as the bug could have
> been giving quite a performance boost before.
FWIW, I had been running more extensive testing on changeset 11225
(before global-bit) and 11229 (global-bit with revert/fix for dom0
builder), and they do not match the initial testing I did with rev 11118
+ global_1 patch. In fact, I am not seeing really any improvement. I
am not sure what is wrong. Should I just test
xen-unstable-tip+newest_patch and see where we stand?
-Andrew Theurer
next prev parent reply other threads:[~2006-08-30 14:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-30 10:06 [PATCH] Optimizing x86-64 xenlinux using global pagesfor user mode (take 2) Ian Pratt
2006-08-30 14:35 ` Andrew Theurer [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-08-30 15:18 Nakajima, Jun
2006-08-30 15:26 ` Andrew Theurer
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