NDLI: Apricot: an optimizing compiler and productivity tool for x86-compatible many-core coprocessors

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Apricot: an optimizing compiler and productivity tool for x86-compatible many-core coprocessors

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Apricot: an optimizing compiler and productivity tool for x86-compatible many-core coprocessors

Content Provider	ACM Digital Library
Author	Bao, Tao Yang, Yi Chakradhar, Srimat Ravi, Nishkam
Abstract	Intel MIC (Many Integrated Core) is the first x86-based coprocessor architecture aimed at accelerating multi-core HPC applications. In the most common usage model, parallel code sections are offloaded to the MIC coprocessor using LEO (Language Extensions for Offload). The developer is responsible for identifying and specifying offloadable code regions, managing data transfers between the CPU and MIC and optimizing the application for performance, which requires some amount of effort and experimentation. In this paper, we present Apricot, an optimizing compiler and productivity tool for x86-compatible many-core coprocessors (such as Intel MIC) that minimizes developer effort by (i) automatically inserting LEO clauses for parallelizable code regions, (ii) selectively offloading some of the code regions to the coprocessor at runtime based on a cost model that we have developed, (iii) applying a set ofoptimizations for minimizing the data communication overhead and improving overall performance. Apricot is intended to assist programmers in porting existing multi-core applications and writing new ones to take advantage of the many-core coprocessor, while maximizing overall performance. Experiments with SpecOMP and NAS Parallel benchmarks show that Apricot can successfully transform OpenMP applications to run on the MIC coprocessor with good performance gains.
Starting Page	47
Ending Page	58
Page Count	12
File Format	PDF
ISBN	9781450313162
DOI	10.1145/2304576.2304585
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-06-25
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Compiler Many-core Intel mic Optimizations Offload
Content Type	Text
Resource Type	Article

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