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Build to order linear algebra kernels

Authors: Jeremy G. Siek; Ian Karlin; Elizabeth R. Jessup;

Build to order linear algebra kernels

Abstract

The performance bottleneck for many scientific applications is the cost of memory access inside linear algebra kernels. Tuning such kernels for memory efficiency is a complex task that reduces the productivity of computational scientists. Software libraries such as the Basic Linear Algebra Subprograms (BLAS) ameliorate this problem by providing a standard interface for which computer scientists and hardware vendors have created highly-tuned implementations. Scientific applications often require a sequence of BLAS operations, which presents further opportunities for memory optimization. However, because BLAS are tuned in isolation they do not take advantage of these opportunities. This phenomenon motivated the recent addition to the BLAS of several routines that perform sequences of operations. Unfortunately, the exact sequence of operations needed in a given situation is highly application dependent, so many more routines are needed. In this paper we present preliminary work on a domain- specific compiler that generates implementations for arbitrary sequences of basic linear algebra operations and tunes them for memory efficiency. We report experimental results for dense kernels and show speedups of 25 % to 120 % relative to sequences of calls to GotoBLAS and vendor-tuned BLAS on Intel Xeon and IBM PowerPC platforms.

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Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
19
Average
Top 10%
Average
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