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Lab Activities 1, 2. Some of the Lab Server Specifications CPU: 2 Quad(4) Core Intel Xeon 5400 processors CPU Speed: 2.5 GHz Cache : Each 2 cores share.

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Presentation on theme: "Lab Activities 1, 2. Some of the Lab Server Specifications CPU: 2 Quad(4) Core Intel Xeon 5400 processors CPU Speed: 2.5 GHz Cache : Each 2 cores share."— Presentation transcript:

1 Lab Activities 1, 2

2 Some of the Lab Server Specifications CPU: 2 Quad(4) Core Intel Xeon 5400 processors CPU Speed: 2.5 GHz Cache : Each 2 cores share a 6 MB cache Front Side Bus Speed: 1333 MHz RAM Size: 8 GB Hard Disk: 3 X 146 GB

3 Lab Activity 1 – Mandelbrot serial versus parallel Objective: explore how the runtime behavior of serial code differs from a parallel code in terms of execution time and number of cores used Serial version utilizes a single core

4 Compiler technologies: Auto parallelization Programmers can use compiler technologies to most quickly take advantage of inherent parallelism in the applications and execute them in parallel

5 General Optimizations Implemented through use of coarse grained switches that govern behavior of both single threaded and multi-threaded codes

6 Example Processor-independent optimizations Windows* /O2Optimizes for Speed : Vectorization

7 Processor-dependent AutoVectorization optimizations Windows* QaxKIntel Pentium III and compatible Intel processors QaxWIntel Pentium 4 and compatible Intel processors QaxNIntel Pentium 4 and compatible Intel processors. Enables new optimizations in addition to Intel processor-specific optimizations QaxPIntel(R) Core(TM) processor family with Streaming SIMD Extensions 3 (SSE3) instruction support QaxOIntel(R) Core(TM) processor family. QaxTIntel(R) Core(TM)2 processor family

8 More Advanced optimizations: auto-parallelization Windows* Qparallelenable the auto-parallelizer to generate multi- threaded code for loops that can be safely executed in parallel Qopenmpenable the compiler to generate multi-threaded code based on the OpenMP* directives

9 Lab Activity 2 - AutoParallelization Objective: Use auto-parallelization on a simple code to gain experience with using the compiler’s auto-parallelization feature


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