Re: [Xen-users] malloc problems?

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Subject:	Re: [Xen-users] malloc problems?
From:	Brandon Williams <driftx@xxxxxxxxx>
Date:	Thu, 28 Jul 2005 16:41:38 -0500
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On 7/28/05, Ernst Bachmann <e.bachmann@xxxxxxxx> wrote:

> Upgrading gcc to 3.4.4 and upgrading glibc to 3.3.5 (with nptl/tls and
> -mno-tls-direct-seg-refs) solved the problem for me, and, as a side effect,
> provided a large performance boost (due to NPTL and the main server app using
> lots of threads)

Just tried that without any luck, sigh.
 
> The host sytem with the failures is a dual Xeon with Hyperthreading. EM64T
> would be there, but I'm not using it, 4GB ram installed, 3.something
> available (due to missing PAE support in xen 2.0.6)

My system has dual Xeons, but no EM64T.

> The host where the domU was running smoothly before moving was a dual xeon,
> also with hyperthreading, but without EM64T extensions, and only 2GB ram.

I tried it with 2GB, no joy there either.

> Only remaining problem on the new host are FPU exceptions appearing out of the
> blue while decompressing/compressing JPEGs, which look to me like xen is
> failing to save/restore all FPU registers while switching context, but thats
> a different story... (workarround was to use integer DCT in libjpeg instead
> of the float one)

That's a bit disturbing...I guess I'm going to have to give up and
scrap Xen for this project, maybe 3.0 will solve my problems.

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