Global Shared Memory and SCI/Dolphin
lindahl at keyresearch.com
Thu Jul 17 17:13:01 EDT 2003
On Thu, Jul 17, 2003 at 12:15:56PM +0100, Daniel Kidger wrote:
> The Quadrics Interconnect also does hardware RDMA, and yes a significant
> percentage of people do use Global Shared Memory programming models rather
> than message passing.
> In fact I thought all four of SCALI/Quadrics/Myrinet/Infiniband could do
> RDMA ??
There's a terminology problem here: Some people mean cache-coherent
shared memory, like that on an SGI Origin.
Another term for non-cache-coherent but globally addressable and
accessible memory is SALC: Shared address, local consistency.
And yes, all 4 of Scali/Quadrics/Myrinet/Infiniband support the
non-cache-coherent kind of shared memory. Programming models in this
* UPC: Unified Parallel C
* CoArray Fortran
* MPI-2 one-sided operations
* Global Arrays from PNL
* The Cray SHMEM library
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