"GPI-2 is an API for the development of scalable, asynchronous and fault tolerant parallel applications. GPI-2 is the second generation of GPI, a product of the CC-HPC at the Fraunhofer ITWM that will continue to be supported and licensed .
GPI-2 implements the GASPI specification (www.gaspi.de),
an API specification which originates from the ideas and concepts
GPI. GPI-2 is an API for asynchronous communication. It provides a
flexible, scalable and fault tolerant interface for parallel
applications.
You can have a look at the API or have a look at some examples. You can also browse through the source code on Github. To get an overview of features and how to compile and run a parallel program, see the GASPI tutorial.
GASPI is a Partitioned Global Address Space (PGAS) API. It aims at
scalable, flexible and failure tolerant computing in massively parallel
environments. GASPI targets a paradigm shift from bulk-synchronous
two-sided communication patterns towards an asynchronous communication
and execution model. To that end GASPI leverages one-sided RDMA-driven
communication with remote completion in a Partitioned Global Address
Space.
Similar to MPI, GASPI is an API for parallel computing on distributed
memory architectures.and relies on SPMD/MPMD execution. Unlike MPI
however, GASPI targets asynchronous data-flow implementations rather
than bulk-synchronous message exchange. Contrary to MPI, GASPI allows
for a highly flexible configuration of the required resources and
features low-level support for fault-tolerant execution.
In contrast to other efforts in the PGAS community, GASPI is neither a
new language (like e.g. Chapel from Cray), nor an extension to a
language (like e.g. Co-Array Fortran). Instead -- very much in the
spirit of MPI -- it complements existing languages like C/C++ or Fortran
with a PGAS API which enables the application to leverage the concept
of the Partitioned Global Address Space. In contrast to, for example,
OpenShmem or Global Arrays, GASPI is not limited to a single memory
model, but provides configurable and yet globally accessible memory
segments. GASPI is interoperable with MPI and allows for incremental
porting of legacy applications."
http://www.gpi-site.com/gpi2/
http://www.gpi-site.com/gpi2/gaspi/
https://github.com/cc-hpc-itwm/GPI-2
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