Performance evaluation of concurrent collections on high-performance multicore computing systems
- ISBN: 9781424464425
- DOI: 10.1109/IPDPS.2010.5470404
Abstract
This paper is the first extensive performance study of a recently proposed parallel programming model, called Concurrent Collections (CnC). In CnC, the programmer expresses her computation in terms of application-specific operations, partially-ordered by semantic scheduling constraints. The CnC model is well-suited to expressing asynchronous-parallel algorithms, so we evaluate CnC using two dense linear algebra algorithms in this style for execution on state-of-the-art multicore systems: (i) a recently proposed asynchronous-parallel Cholesky factorization algorithm, (ii) a novel and non-trivial higher-level partly-asynchronous generalized eigensolver for dense symmetric matrices. Given a well-tuned sequential BLAS, our implementations match or exceed competing multithreaded vendor-tuned codes by up to 2.6. Our evaluation compares with alternative models, including ScaLAPACK with a shared memory MPI, OpenMP, Cilk++, and PLASMA 2.0, on Intel Harpertown, Nehalem, and AMD Barcelona systems. Looking forward, we identify new opportunities to improve the CnC language and runtime scheduling and execution.
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