UPC++ v1.0 Testimonials

Below are some testimonials from users of the UPC++ library

UPC++ exposes a powerful and intuitive model for communication and computation, making what can otherwise be challenging concepts (one-sided memory operations, async execution, etc.) approachable for application developers. In our work modernizing the distributed data model of a legacy geophysical application, we found that UPC++ offered us a more concise, understandable, and performant model for expressing one-sided communication than MPI-3 RMA, while also offering interoperability with other parallel programming libraries / tools used elsewhere in the codebase (e.g. MPI-IO, OpenMP). Further, the documentation (Specification, Programmer's Guide, etc.) is an invaluable resource for building a solid understanding of key concepts, common idioms, and correctness concerns when developing UPC++ applications. Indeed, the Pagoda team clearly prioritizes making their work accessible to users.

-- Scott French, Berkeley Seismological Laboratory, U.C. Berkeley; Now at Google, LLC.

"UPC++ is now my programming language of choice for all applications where performance matters, both on HPC systems and single multicore servers. I have used it to completely rewrite a genome assembly application that was originally written in UPC and MPI, and have also written an agent-based cell-level model of viral infection and immune response in the lungs. UPC++ has an excellent blend of ease-of-use combined with high performance. Features such as RPCs make it really easy to rapidly prototype applications, and still have decent performance. Other features (such as one-sided RMAs and asynchrony) enable fine-tuning to get really great performance."

-- Steven Hofmeyr, Lawrence Berkeley National Lab

"If your code is already written in a one-sided fashion, moving from MPI RMA or SHMEM to UPC++ RMA is quite straightforward and intuitive; it took me about 30 minutes to convert MPI RMA functions in my application to UPC++ RMA, and I am getting similar performance to MPI RMA at scale."

-- Sayan Ghosh, Pacific Northwest National Lab

"With UPC++, we were able to rapidly prototype and test hypotheses regarding various implementation approaches to important communication patterns. We found that UPC++ provided not only programmability and good user tools, but also offered such scalable communication performance over our MPI application code base, that we plan to migrate the code to UPC++."

-- Marquita Ellis, UC Berkeley & Lawrence Berkeley National Lab

UPC++ enabled me to express the remote communication operations used in my actor library in a concise fashion. The main advantage of UPC++ is that it reconciles a high-level, well thought-out interface with the realities of modern interconnection fabrics. RPCs and completions make it easy to overlap computation and communication, a necessity for reaching the best possible performance.

-- Alexander Pöppl, Technical University of Munich, Germany

UPC++ offers an intuitive programming model that captures close-to-the-metal communication performance over a wide range of platforms. Applications where latency dominates communication costs will see a benefit, e.g. due to fine-grained irregular data movement patterns. As a C++ model, UPC++ musters expressive power that reduces development times and enhances software maintainability. The UPC++ remote procedure call is a particularly powerful construct, and economizes the expression of correct and performant code.

-- Scott Baden, University of California, San Diego and Inria International Chair

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