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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: Mon, 7 Aug 2006 08:23:28 -0500
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* Subrahmanian, Raj <raj.subrahmanian@xxxxxxxxxx> [2006-08-04 19:34]:
> Ryan,
> I tried out these patches on an ES7000. 
> It's an x86-64 two-node machine with 16 procesors and 32 GB of memory
> total. 

Thanks for trying the patches out.

> I applied all of the six patches you had posted to the latest changeset
> as of today(10946:e1a2a8029e9f).
> Xen finds the SLIT and SRAT tables. I was able to bring up and down
> multiple DomUs. 
> I then tried running a set of tests (bringing up domus and running LTP
> and Kernbench) and I found that the system was hanging. It wasn't
> crashed (I could ping it etc). But it was running so slow that ssh
> wouldn't work, even though I could use telnet to get on port 22.
> I found out by accident booting into Dom0 and starting xm top hangs the
> system in a similar fashion.

That doesn't look good.  And if you roll back the patches, doing the
above works without issue?  I'll see if I can lock up my box using xm

> Nothing appears on the serial port.
> I have attached the serial output.
> I am trying to figure out why it is happening.

In any case, I'd be interested in seeing the 'H' and 'u' (heapinfo and
numa topology) keyhandlers.  Also, from dom0, running a xen_numastat -H
-d -1 (dump the heap and the memory to node mapping of all running

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

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