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Compiler Improvement of Register Usage

Compiler Improvement of Register Usage

Compiler Improvement of Register Usage. Part 1 - Chapter 8, through Section 8.4 Anastasia Braginsky. Roadmap. Introduction Scalar Replacement Unroll-and-Jam. Introduction. Processor cycle time is decreasing; while memory time remains almost the same.

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940 views • 88 slides
Optimizing single thread performance

Optimizing single thread performance

Optimizing single thread performance. Locality and array allocation Dependence Loop transformations. Computer memory hierarchy. Implication: Explore data locality to achieve high performance Make sure that a program has a small footprint (to fix the upper level cache/registers).

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475 views • 34 slides
Optimizing single thread performance

Optimizing single thread performance

Optimizing single thread performance. Dependence Loop transformations. Optimizing single thread performance. Assuming that all instructions are doing useful work, how can you make the code run faster? Some sequence of code runs faster than other sequence Optimize for memory hierarchy

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448 views • 32 slides
Coarse-Grain Parallelism

Coarse-Grain Parallelism

Coarse-Grain Parallelism. Chapter 6 of Allen and Kennedy. Review. SMP machines have multiple processors all accessing a central memory. The processors are unrelated, and can run separate processes. Starting processes and synchonrization between proccesses is expensive. Synchonrization.

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360 views • 22 slides
Basic Loop Parallelization

Basic Loop Parallelization

Basic Loop Parallelization. Taewook Eom RTOS Lab., School of EECS, SNU. Outline. Data dependences Loop parallelization How to extract data dependence information. Loop Parallelization Goal. DoAll loops Loops whose iterations can execute in parallel Example For (i = 0; i < n; i++)

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368 views • 17 slides

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