About OpenCL

1. OpenCL- The Open Standard for
Parallel Programming of
Heterogeneous systems
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DEPT. OF IT - CNW 08/17/14
Judyfer.W.S, 511309
M.E, Communication and Networking
St.Xaviers Catholic College of Engineering, Nagercoil

2. OVERVIEW
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 Science
 Computing
 Serial Computing
 Parallel Computing
 Why Parallel Computing?
 Parallelism- Future of Computing
 Why Heterogeneous Computing?
 What is OpenCL?
 OpenCL Objectives
 Anatomy of OpenCL
 OpenCL Architecture
 Simple Program

3. Science
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4. Computing
 The ACM Computing Curricula 2005 defined "computing" as follows:
"In a general way, we can define computing to mean any
goal-oriented activity requiring, benefiting from, or creating
computers. Thus, computing includes designing and building
hardware and software systems for a wide range of purposes;
processing, structuring, and managing various kinds of
information; doing scientific studies using computers; making
computer systems behave intelligently; creating and using
communications and entertainment media; finding and gathering
information relevant to any particular purpose, and so on. The list
is virtually endless, and the possibilities are vast."
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5. Serial Computing
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6. Parallel Computing
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7. Amdahl's law
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8. Why Parallel Computing?
Real World Problems
Save Time and Money
Solve larger and more complex problems
Provide Concurrency
Take advantage of Non-local Resources
Make better use of underlying parallel hardware
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9. Parallelism- Future of Computing
The race is already on for Exascale Computing!
Exaflop = 1018
calculations per second
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10. Why heterogeneous computing?
Increased computational power
 does come from parallelism with multiple CPUs and
programmable GPUs
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11. OpenCL
 Open
 Royalty-free
 OpenCL 1.0- Dec8,2008- The Khronos Group
 Low level language
 Supports both data parallel and task parallel programming
modes.
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12. OpenCL objectives
1. To grow the market of Parallel Computing.
2. Cross-vendor software portability.
3. Support for wide diversity of application.
4. Rapid deployment in the market.
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13. Anatomy of OpenCL
The OpenCL development framework is made up of
three parts:
1. Language specification
2. Platform layer API
3. Runtime API
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14. The Platform Model
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15. The Execution Model
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16. The Memory Model
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