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Re: [Xen-devel] [PATCH 0/6] xen, xend, tools: Add NUMA support to Xen Is

To: "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 0/6] xen, xend, tools: Add NUMA support to Xen Issues on the ES7000
From: Ryan Harper <ryanh@xxxxxxxxxx>
Date: Thu, 17 Aug 2006 11:47:43 -0500
Cc: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, Ryan Harper <ryanh@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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* Subrahmanian, Raj <raj.subrahmanian@xxxxxxxxxx> [2006-08-16 22:29]:
> Ryan,
> I put in the NUMA patches 1-6 on changeset 10946 (the patches wouldn't
> apply cleanly on the current tip). I ran with both 1 cell and 2 cells. 

I'll be sending an update soon.

> I have attached the complete output.
> I got the heap and the numa info before and after running xm top (which
> slowed the system down dramatically as mentioned previously).
> http://lists.xensource.com/archives/html/xen-devel/2006-08/msg00348.html
> As mentioned previously, the system does not die (I can get the debug
> info, I can ping etc). But the system slows down dramatically, so
> ssh-ing into the box is impossible.
> Let me know what else I can try out/look at etc.

I can't reproduce the hang, however, there are some issues that need
fixing up with libxenstat and the physinfo hypercall.  I'll include those
fixes in when I refresh to tip today.  If you can, I'd be interested in
seeing what process in dom0 is chewing up the cpu if you can get that
info.  I doubt this is an issue, but can you repro with sedf scheduler
as well?  And while I don't know much about the credit scheduler,
dumping the runqueues 'r' keyhandler might show something to the
folks who know the credit scheduler better.

Oh, and if you have a log of xen/dom0 booting on your 1 and 2 cell box
with out the numa patches on the same changeset, I'd like to see that to
compare output.

Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253   T/L: 678-9253

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