Re: [Beowulf] Simple MPI programs hang

2008-03-19 Thread Geoff Jacobs
Gregg Germain wrote: > Hi everyone, > > I've created a 2 node cluster running FC8. I've installed MPICH2 > 1.0.6pl on both (not NFS'd). > > The Master, Ragnar, is a 64 bit; olaf is a 32 bit. > > I set up the ring, and mpdtrace shows: > > $ mpdtrace -l > Ragnar_37601 (192.168.0.2) > olaf_45530

[Beowulf] [p2s2-announce] UPDATED CFP: Workshop on Parallel Programming Models and Systems Software for High-end Computing (P2S2)

2008-03-19 Thread Sayantan Sur
CALL FOR PAPERS === First International Workshop on Parallel Programming Models and Systems Software for High-end Computing (P2S2) (http://www.mcs.anl.gov/events/workshops/p2s2) Sep. 8th, 2008 To be held in conjunction with ICPP-08: The 27th International Conference on Parallel Proc

[Beowulf] Simple MPI programs hang

2008-03-19 Thread Gregg Germain
Hi everyone, I've created a 2 node cluster running FC8. I've installed MPICH2 1.0.6pl on both (not NFS'd). The Master, Ragnar, is a 64 bit; olaf is a 32 bit. I set up the ring, and mpdtrace shows: $ mpdtrace -l Ragnar_37601 (192.168.0.2) olaf_45530 (192.168.0.5) $ I run a VERY simple MPI p

Re: [Beowulf] Which Xeon supports NUMA?

2008-03-19 Thread Chris Samuel
- "Chris Samuel" <[EMAIL PROTECTED]> wrote: > So either this was in the early days of CSI, or there are/were > other Intel AMD64 NUMA boxes out there that none of us know about.. Aha - to answer myself this even predates the core architecture, rolling our clocks back to 2005 we find this me

Re: [Beowulf] Which Xeon supports NUMA?

2008-03-19 Thread Chris Samuel
- "Carsten Aulbert" <[EMAIL PROTECTED]> wrote: > Sorry, I came up with this question because when compiling 2.6.24.3 > (linux kernel) I came across these lines: > > For x86_64 this is recommended on all multiprocessor Opteron systems. > > > > If the system is EM64T, you should say N unl

Re: [Beowulf] NMI (Non maskable interrupts)

2008-03-19 Thread Chris Samuel
- "Mark Hahn" <[EMAIL PROTECTED]> wrote: > > We also saw performance improvements going to the mainline > > kernel (2.6.24.*) from the CentOS 5 kernels. > > interesting - in what area? I think it was NAMD, from memory. -- Christopher Samuel - (03) 9925 4751 - Systems Manager The Victoria

Re: [Beowulf] Three questions on a new Beowulf Cluster

2008-03-19 Thread amjad ali
Hello, If you dont want to indulge into cluster details and want to use it as "black box" kind of tool, Then I would suggest you to use some commercial cluster scheduler/manager like Aspen Beowulf Cluster, PlatformLSF, Scali Manage etc.. or you may go for ROCKS , OSCAR etc This way perhaps you coul