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ac6 >> ac6-training >> Programming >> Languages >> OpenCL Download Catalog Download as PDF Write us Printable version

L9 OpenCL

Parallel programming with OpenCL-1.2

formateur
Objectives
  • Learn parallel programming with OpenCL.
  • Know what (not) to expect from parallel programming.
  • Understand heavy multithreading and how it is mapped to the hardware.
  • Measure OpenCL code performance, locate and solve bottlenecks.
  • Write efficient OpenCL code.
Depending on the hardware environment, exercises will be run on either multi-core CPUs, nVidia or ATI GPUs.
Course Environment
  • Theoretical course
    • PDF course material (in English) supplemented by a printed version.
    • The trainer answers trainees' questions during the training and provide technical and pedagogical assistance.
  • Practical activities
    • Practical activities represent from 40% to 50% of course duration.
    • Code examples, exercises and solutions
    • One PC (Linux ou Windows) for the practical activities with, if appropriate, a target board.
      • One PC for two trainees when there are more than 6 trainees.
    • For onsite trainings:
      • An installation and test manual is provided to allow preinstallation of the needed software.
      • The trainer come with target boards if needed during the practical activities (and bring them back at the end of the course).
  • Downloadable preconfigured virtual machine for post-course practical activities
  • At the start of each session the trainer will interact with the trainees to ensure the course fits their expectations and correct if needed
Pre-requisites
  • Good knowledge of the C language
Target Audience
  • Any embedded systems engineer or technician with the above prerequisites.
Evaluation modalities
  • The prerequisites indicated above are assessed before the training by the technical supervision of the traineein his company, or by the trainee himself in the exceptional case of an individual trainee.
  • Trainee progress is assessed in two different ways, depending on the course:
    • For courses lending themselves to practical exercises, the results of the exercises are checked by the trainer while, if necessary, helping trainees to carry them out by providing additional details.
    • Quizzes are offered at the end of sections that do not include practical exercises to verifythat the trainees have assimilated the points presented
  • At the end of the training, each trainee receives a certificate attesting that they have successfully completed the course.
    • In the event of a problem, discovered during the course, due to a lack of prerequisites by the trainee a different or additional training is offered to them, generally to reinforce their prerequisites,in agreement with their company manager if applicable.
First day
Introduction to OpenCL
  • History
    • OpenCL 1.0
    • OpenCL 1.1
    • OpenCL 1.2
    • OpenCP/EP (Embedded Profile)
  • Design goals of OpenCL
    • CPUs, GPUs and GPGPUs
    • Data-parallel and Task-parallel
    • Hardware related and portable
  • Terminology
    • Host / Device
    • Memory model
    • Execution Model
The OpenCL Architecture
  • The OpenCL Architecture
    • Platform Model
    • Execution Model
    • Memory Model
    • Programming Model
  • The OpenCL Software Stack
  • Example
Exercise:  Installation and test of the OpenCL SDK
The OpenCL Host API
  • Platform layer
    • Querying and selecting devices
    • Managing compute devices
    • Managing computing contexts and queues
    • The host objects: program, kernel, buffer, image
Exercise:  Write a platform discovery and analysis program (displaying CPUs, GPUs, versions...)
  • Runtime
    • Managing resources
    • Managing memory domains
    • Executing compute kernels
Exercise:  Write an image loader program, transferring image to/from compute devices
  • Compiler
    • The OpenCL C programming language
    • Online compilation
    • Offline compilation
Second day
The Basic OpenCL Execution Model
  • How code is executed on hardware
    • Compute kernel
    • Compute program
    • Application queues
  • OpenCL Data-parallel execution
    • N-dimensional computation domains
    • Work-items and work-groups
    • Synchronization and communication in a work-group
    • Mapping global work size to work-groups
    • Parallel execution of work-groups
Exercise:  Compile and execute a program to square an array on the platform computing nodes
The OpenCL Programming Language
  • Restrictions from C99
  • Data types
    • Scalar
    • Vector
    • Structs and pointers
    • Type-conversion functions
    • Image types
Exercise:  Rewrite the square program to use vector operations
  • Required built-in functions
    • Work-item functions
    • Math and relational
    • Input/output
    • Geometric functions
    • Synchronization
  • Optional features
    • Atomics
    • Rounding modes
Exercise:  Write and execute an image manipulation program (Blur filter)
Third day
Advanced OpenCL Execution modes
  • Profiling
Exercise:  Enhance the image manipulation program to measure kernel computation time
  • The OpenCL Memory Model
    • Global Memory
    • Local Memory
    • Private Memory
  • OpenCL Task-parallel execution
    • Optional OpenCL feature
    • Native work-items
Exercise:  Simulate the N-Body problem, displaying data using OpenGL
Efficient OpenCL
  • When (not) to use OpenCL
  • Code design guidelines
  • Explicit vectorization
Exercise:  Explore vectorisation on an image rotation kernel
  • Memory latency and access patterns
    • ALU latency
    • Using local memory
Exercise:  Enhance the Blur filter program to investigate memory optimisations
  • Synchronizing threads
  • Warps/Wavefronts, work groups, and GPU cores
Duration
3 days
Cost
2390 € HT
Calendar
Session calendar

This course, designed for face-to-face delivery, can be provided either in our Paris training center or, worldwide, on your premises.

Scheduled classes are confirmed as soon as there is two confirmed bookings. Bookings are accepted until 1 week before the course start.

A version tailored for live online delivery is available under reference oL9 - Parallel programming with OpenCL

To book a training session or for more information, please contact us on info@ac6-training.com.

Registrations are accepted till one week before the start date for scheduled classes. For late registrations, please consult us.

You can also fill and send us the Adobe PDF format file registration form

Last update of course schedule: 5 September 2022

Booking one of our trainings is subject to our Adobe PDF format file General Terms of Sales

 

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Last site update: Thu Dec 7 11:10:43 2023
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