[SAGA-RG] quick poll: SPMD attributes

[Andre Merzky]

Quoting [Peter Tr?ger] (Dec 10 2009):
> >
> > SPMDVariation
> > NumberOfProcesses
> > ProcessesPerMachine
> > ProcessesPerSlot
> > ProcessesPerCore
> >
> >(Slot and Machine are the DRMAA terms for CPU and Host).
> 
> Small correction: DRMAAv2 has the concept machine, socket (not slot),  
> and core. Socket is the new term for CPU in most of the multi-core  
> publications. So, a 2-way SMP system with 2 Intel QuadCore processors  
> has:

Argh, sorry for the mixup!

Andre.


> machineSockets = 2
> machineCoresPerSocket = 4
> 
> The example is still correct then:
> 
> >So, for example, one could specify a 16 process MPICH job as
> >
> > SPMDVariation     = MPICH
> > NumberOfProcesses = 16
> > ProcessesPerCore  = 2
> >
> >That would allow on to run on a 2-way QuadCore host, placing two
> >processes on each of the 8 cores.
> 
> Best,
> Peter.
> 



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