This proposal seeks computational resources at the ALCF, NERSC and OLCF supercomputing facilities to support the application readiness activities and portability studies necessary to prepare users for next generation architectures. ALCF, NERSC and OLCF each run an early application readiness program that will prepare users for these next generation architectures. The ALCF has the Early Science Program (ESP), NERSC the NERSC Exascale Science Application Program (NESAP), and the OLCF, the Center for Accelerated Application Readiness (CAAR) program. In 2015, the three facilities each launched their application readiness programs, and in total, across all three centers, 40 applications teams are participating. Recently, the OLCF issues a call for Early Science projects, and the ALCF issued a call for Aurora early science data analytics applications. In order for the application readiness programs to be successful it is crucial that application developers have allocations not only at their sponsored supercomputing facility, but also at a facility with alternate architectures so that portability issues can be explored. The requested allocation will support the coordination and collaboration within these programs and provide resources to the application porting teams with the overall objective of delivering applications that are high performing and, as much as possible, architectural and performance portable.
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