Developer Guide

oneAPI GPU Optimization Guide

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ID 771772
Date 12/16/2022
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Document Table of Contents
Document Table of Contents x
oneAPI GPU Optimization Guide
oneAPI GPU Optimization Guide x
Introduction Getting Started Parallelization Intel® Iris® Xe GPU Architecture GPU Execution Model Overview SYCL* Thread Mapping and GPU Occupancy Kernels Using Libraries for GPU Offload Host/Device Memory, Buffer and USM Host/Device Coordination Using Multiple Heterogeneous Devices Compilation Optimizing Media Pipelines OpenMP Offloading Tuning Guide Debugging and Profiling GPU Analysis with Intel® Graphics Performance Analyzers (Intel® GPA) Reference Terms and Conditions
Kernels x
Sub-groups and SIMD Vectorization Removing Conditional Checks Registerization and Avoid Register Spills Shared Local Memory Pointer Aliasing and the Restrict Directive Synchronization among Threads in a Kernel Considerations for Selecting Work-group Size Reduction Kernel Launch Executing Multiple Kernels on the Device at the Same Time Submitting Kernels to Multiple Queues Avoid Redundant Queue Construction
Synchronization among Threads in a Kernel x
Atomic Operations Local Barriers vs Global Atomics
Using Libraries for GPU Offload x
Using Performance Libraries Using Standard Library Functions in SYCL Kernels Efficiently Implementing Fourier Correlation Using oneAPI Math Kernel Library (oneMKL)
Host/Device Memory, Buffer and USM x
Performance Impact of USM and Buffers Optimizing Memory Movement Between Host and Accelerator Avoid moving data back and forth between host and device Avoid Declaring Buffers in a Loop Buffer Accessor Modes
Host/Device Coordination x
Asynchronous and Overlapping Data Transfers Between Host and Device
Compilation x
Just-In-Time Compilation in SYCL Specialization Constants
Optimizing Media Pipelines x
Media Engine Hardware Media API Options for Hardware Acceleration Media Pipeline Parallelism Media Pipeline Inter-operation and Memory Sharing SYCL-Blur Example
OpenMP Offloading Tuning Guide x
OpenMP Directives OpenMP Execution Model Terminology Compiling and Running an OpenMP Application Offloading oneMKL Computations onto the GPU Tools to Analyze Performance of OpenMP Applications OpenMP Offload Best Practices
OpenMP Offload Best Practices x
Using More GPU Resources Minimizing Data Transfers and Memory Allocations Making Better Use of OpenMP Constructs Memory Allocation Clauses: is_device_ptr, use_device_ptr, has_device_addr, use_device_addr
Debugging and Profiling x
GPU Analysis with VTuneTM Profiler Intel® Advisor GPU Analysis Doing IO in the Kernel Using the Timers How to Use the Intercept Layer for OpenCLTM Applications Level Zero Tracer
Intel® Advisor GPU Analysis x
Identify Regions to Offload to GPU with Offload Modeling Run a GPU Roofline Analysis Optimize Memory-bound Applications with GPU Roofline
oneAPI GPU Optimization Guide

Debugging and Profiling

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