[Beowulf] Kernel action relevant to us

2009-12-16 Thread Greg Lindahl
The following patch, not yet accepted into the kernel, should allow local TCP connections to start up faster, while remote ones keep the same behavior of slow start. - Forwarded message from cha...@google.com - From: cha...@google.com Date: Tue, 15 Dec 2009 13:15:28 -0800 To: da...@daveml

Re: [Beowulf] Geriatric computer does not stay up

2009-12-16 Thread Gus Correa
Hi David Some of the built-in 3Com Ethernet 100 interfaces on Tyan S2466[-4M] motherboards we have here became flaky/failed after many years of use. Those are main boards in in several standalone workstations/PCs. I don't administer those systems, but I believe the symptoms were somewhat random,

Re: [Beowulf] PXE/TFTP and Xen Kernel Issues

2009-12-16 Thread Bernard Li
Hi Jess: With Xen-based kernels, you should be using the xen.gz "kernel" instead of vmlinuz. Here's what a grub entry looks like for booting Xen-based kernels: title CentOS (2.6.18-164.el5xen) root (hd0,0) kernel /xen.gz-3.4.0 module /vmlinuz-2.6.18-164.el5xen ro root=/de

Re: [Beowulf] Geriatric computer does not stay up

2009-12-16 Thread Gerald Creager
David Mathog wrote: So we have a cluster of Tyan S2466 nodes and one of them has failed in an odd way. (Yes, these are very old, and they would be gone if we had a replacment.) On applying power the system boots normally and gets far into the boot sequence, sometimes to the login prompt, then it

[Beowulf] Intel Cannonbells

2009-12-16 Thread Prentice Bisbal
Gus Correa wrote: > Incidentally, have you watched the "cannonbells" movie? > > http://www.reghardware.co.uk/2009/12/16/intel_chime_stunt/print.html > http://www.theregister.co.uk/2009/12/16/intel_ftc/ > > I'm calling BS on that one. While possible, I suspect the human projectiles were CG'ed in.

[Beowulf] Geriatric computer does not stay up

2009-12-16 Thread David Mathog
So we have a cluster of Tyan S2466 nodes and one of them has failed in an odd way. (Yes, these are very old, and they would be gone if we had a replacment.) On applying power the system boots normally and gets far into the boot sequence, sometimes to the login prompt, then it locks up. If booted

Re: [Beowulf] A question about antique hardware

2009-12-16 Thread Greg Lindahl
> Did anybody ever get Gigabit Ethernet NICs to work on > the Tyan Tiger S2466-4M motherboards under Linux? You talked a lot about the BIOS but didn't say if it was a 6 year old Linux version. Presumably your old mobos worked fine with the same version of Linux that this guy is failing with, but s

Re: [Beowulf] Intel compiler part of the anti-trust lawsuit

2009-12-16 Thread Gus Correa
Incidentally, have you watched the "cannonbells" movie? http://www.reghardware.co.uk/2009/12/16/intel_chime_stunt/print.html http://www.theregister.co.uk/2009/12/16/intel_ftc/ Gus Correa Greg Lindahl wrote: You folks will recall that Intel, a while ago, stopped enabling their compiler's highes

[Beowulf] A question about antique hardware

2009-12-16 Thread Gus Correa
Dear Beowulfers Did anybody ever get Gigabit Ethernet NICs to work on the Tyan Tiger S2466-4M motherboards under Linux? If so, I would appreciate any words of wisdom about which NICs work, the appropriate BIOS settings, which PCI slots to use, etc. *** I flashed the Tyan S2466-4M BIOS to the l

[Beowulf] Intel compiler part of the anti-trust lawsuit

2009-12-16 Thread Greg Lindahl
You folks will recall that Intel, a while ago, stopped enabling their compiler's highest optimization levels for chips that weren't "Genuine Intel(tm)". Well, that's part of the new FTC complaint against Intel: Intel secretly redesigned key software, known as a compiler, in a way that deliberate

Re: [Beowulf] Performance tuning for Jumbo Frames

2009-12-16 Thread Rahul Nabar
On Tue, Dec 15, 2009 at 10:41 PM, Patrick Geoffray wrote: > Bogdan Costescu wrote: > So, instead of requiring ~4K per port minimum, you need about ~20K per port. > Add to that up to 8 priorities with DCB and the buffering requirement are > quickly getting out of hand. That's one big drawbacks of

Re: [Beowulf] Performance tuning for Jumbo Frames

2009-12-16 Thread Greg Lindahl
On Tue, Dec 15, 2009 at 11:41:59PM -0500, Patrick Geoffray wrote: > So, instead of requiring ~4K per port minimum, you need about ~20K per > port. Add to that up to 8 priorities with DCB and the buffering > requirement are quickly getting out of hand. Don't worry, switch vendors will simply i