Unified Parallel C at LBNL/UCB UPC at LBNL/U.C. Berkeley Overview Kathy Yelick LBNL and U.C. Berkeley.

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Unified Parallel C at LBNL/UCB UPC at LBNL/U.C. Berkeley Overview Kathy Yelick LBNL and U.C. Berkeley

Unified Parallel C at LBNL/UCB UPC Team at Berkeley Christian Bell: Myrinet conduit (away at school, returning in the Fall) Dan Bonachea: GASNet spec, MPI and Quadrics Wei Chen: UPC/Open54 compiler Jason Duell: Quadrics communication and UPC runtime layer implementation Paul Hargrove: VIA, Infiniband, etc. Parry Husbands: UPC Applications Costin Iancu: UPC/Open64 compiler Mike Welcome: IBM/SP communication, moving into applications Kathy Yelick: PI

Unified Parallel C at LBNL/UCB Overview of UPC Effort Three components: 1)Compiler –Portable compiler infrastructure (UPC->C) –Explore optimizations: communication, shared pointers –Transfer technology to other UPC compilers –E.g., the HP compiler 2)Communication support for GAS languages –Performance evaluation: influence machine vendors –Tech transfer to ARMCI 3)Applications and benchmarks –Started with NAS PB (MG and CG) –Mesh generation application this year

Unified Parallel C at LBNL/UCB Progress this Year The compiler is running! -Not gcc dependent (mostly) -Backend changes for C code generator GASNet implementations on Quadrics, Myrinet, and LAPI New NAS applications: -NAS-compliant CG -MG done previously New mesh generation application Papers: -Network performance -Compiler evaluation -GASNet on Myrinet -Optimizations (underway)

Unified Parallel C at LBNL/UCB Agenda 12:30 Overview -- Kathy Yelick 12:50 UPC Translator and Runtime -- Wei Chen 1:20 GASNet -- Dan Bonachea and Mike Welcome 1:50 Break 2:00 Parallel Optimizations for UPC -- Costin Iancu 2:30 Applications -- Parry Husbands 3:00 Break 3:15 Hardware Discussion-- Paul Hargrove 3:45 Performance of Communication Networks -- Jason Duell 4:15 Discussion and Closing Remarks

Unified Parallel C at LBNL/UCB Future Plans (1) Language -Consistency model -Progress guarantees -Array library (other versions of memcopy) -Hierarchical machine support -Teams -UPC++?

Unified Parallel C at LBNL/UCB Future Plans (2) Translator: -Release -Beta to UF, Sandia?, GWU?, NSA? -Maintenance and tuning -Optimizations -Single processor performance -Privatization -Communication overlap and pipelining -Software caching -Aggregation -IA64 backend? -Debugging?

Unified Parallel C at LBNL/UCB Future Plans (3) Runtime -Shared memory implementation -I/O implementation GASNet -Tuning and maintenance -Collectives -Strided and scatter/gather -X1 port -Infiniband port -Red Storm port ? -BlueGene/L port ?

Unified Parallel C at LBNL/UCB Future Plans (4) Applications -SuperLU, starting with Sparse Cholesky -PetSc? -NAS-like AMR benchmark? -Astrophysics code from UCB/McMaster -Robert Thacker -Sandia (Zhaofang Wen) ? -3D Mesh generation based on Pyramid ?