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Content Provider | IEEE Xplore Digital Library |
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Author | Wegener, A. |
Copyright Year | 2013 |
Description | Author affiliation: Samplify Syst., Campbell, CA, USA (Wegener, A.) |
Abstract | Summary form only given. Numerical computations have accelerated significantly since 2005 thanks to two complementary, silicon-enabled trends: multi-core processing and single instruction, multiple data (SIMD) accelerators. Unfortunately, due to fundamental limitations of physics, these two trends could not be accompanied by a corresponding increase in memory, storage, and I/O bandwidth. High-performance computing (HPC) is the proverbial “canary in the coal mine” of multi-core processing. When HPC hits a multi-core will likely encounter a similar limit in few years. We describe the computationally efficient (Fig 1b) and adaptive APplication AXceleration (APAX) numerical encoding method to reduce the memory wall for integers and floating-point operands. APAX achieves encoding rates between 3:1 and 10:1 without changing the dataset's statistical or spectral characteristics. APAX encoding takes advantage of three characteristics of all numerical sequences: peak-to-average ratio, oversampling, and effective number of bits (ENOB). Uncertainty quantification and spectral methods quantify the degree of uncertainty (accuracy) in numerical datasets. APAX profiler creates a rate-correlation graph with recommended operating signals, and fundamental limit, consumer point, provides 18 quantitative metrics comparing the original and decoded displays input and residual spectra with a residual histogram. On 24 integer and floating-point HPC datasets taken from climate, multi-physics, and seismic simulations, APAX averaged 7.95:1 encoding ratio at a Pearson's correlation coefficient of 0. 999948, and a spectral margin (input spectrum min - residual spectrum mean) of 24 dB. HPC scientists confirmed that APAX did not change HPC simulation results DRAM and disk transfers by 8x, accelerating HPC “time to results” by 20% while reducing to 50%. |
Sponsorship | Univ. Arizona |
Starting Page | 528 |
Ending Page | 528 |
File Size | 439634 |
Page Count | 1 |
File Format | |
ISBN | 9781467360371 |
ISSN | 10680314 |
e-ISBN | 9780769549651 |
DOI | 10.1109/DCC.2013.107 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2013-03-20 |
Publisher Place | USA |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Encoding Field programmable gate arrays Software Acceleration Market research Multicore processing real-time compression HPC high-performance computing memory wall |
Content Type | Text |
Resource Type | Article |
Subject | Computer Networks and Communications |
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