Linux distributives for Opteron
becker at scyld.com
Thu Mar 20 16:42:13 EST 2003
On Thu, 20 Mar 103, Mikhail Kuzminsky wrote:
> Subject: Linux distributives for Opteron
> By RedHat it was declared that x86-64 support will be realized
> in the frames of RH Linux Advanced Server distributive.
> But what is known about much more cheap RH Linux professional (according
> our experience, it is enough for building beowulf clusters w/2-cpu's
> nodes) ? According my data, x86-64 support in RH may be realized
> just at summer.
As I have hinted in my postings (and at our SC02 demo), we have been
working on Opteron support. Although I don't see any race to be first
with a no-cost, full-support release.
The x86-64 backwards-compatible approach means that there are several
different levels that can be supported:
Fixing the few minor issues with running entirely in 32 bit mode.
(Easily done. Our distribution and I believe most others have already
made the changes.)
A release with a 64 bit kernel, both 32 and 64 bit libraries and
compiler chain, using 32 bit utilities and applications. This
involves tracking down some obscure library bugs(*), but most
everything works. With a few days work you can do this at home.
It took a few weeks of work for our system.
A 64 bit kernel, with a mix of tools compiled for 32 and 64 bits as
A 64 bit release, with all tools recompiled and 32 bit libraries only
used by third party applications.
A release with a 64 bit kernel, dynamically supporting both 32 and 64
bit compute nodes. That means
detecting and providing the correct kernel to the compute nodes,
limiting x86-64 applications to nodes that can support them
controlling application processes on either 32 or 64 compute nodes
*1 How can 'sleep' dump core? Oh, when it's GNU sleep that has support for
converting from extra-planetary time units and then calling
Donald Becker becker at scyld.com
Scyld Computing Corporation http://www.scyld.com
410 Severn Ave. Suite 210 Scyld Beowulf cluster system
Annapolis MD 21403 410-990-9993
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