Legal Information Getting Help and Support Introduction Coding for the Intel® Processor Graphics Platform-Level Considerations Application-Level Optimizations Optimizing OpenCL™ Usage with Intel® Processor Graphics Check-list for OpenCL™ Optimizations Performance Debugging Using Multiple OpenCL™ Devices Coding for the Intel® CPU OpenCL™ Device OpenCL™ Kernel Development for Intel® CPU OpenCL™ device
Mapping Memory Objects Using Buffers and Images Appropriately Using Floating Point for Calculations Using Compiler Options for Optimizations See Also Using Built-In Functions Loading and Storing Data in Greatest Chunks Applying Shared Local Memory Using Specialization in Branching Considering native_ and half_ Versions of Math Built-Ins Using the Restrict Qualifier for Kernel Arguments Avoiding Handling Edge Conditions in Kernels
Using Shared Context for Multiple OpenCL™ Devices Sharing Resources Efficiently Synchronization Caveats Writing to a Shared Resource Partitioning the Work Keeping Kernel Sources the Same Basic Frequency Considerations Eliminating Device Starvation Limitations of Shared Context with Respect to Extensions
Why Optimizing Kernel Code Is Important? Avoid Spurious Operations in Kernel Code Perform Initialization in a Separate Task Use Preprocessor for Constants Use Signed Integer Data Types Use Row-Wise Data Accesses Tips for Auto-Vectorization Local Memory Usage Avoid Extracting Vector Components Task-Parallel Programming Model Hints
Using Compiler Options for Optimizations
The -cl-fast-relaxed-math compiler option is the most general and powerful among other performance related options. Notice that the option affects the compilation of the entire OpenCL program, so it does not permit fine control of the resulting numeric accuracy. You may want to consider experimenting with native_* equivalents separately for each specific built-in instead, keeping track of the resulting accuracy. Please find more details on this approach in the “Considering native_ and half_ versions of Math Built-Ins” section.
Refer to the User Manual - OpenCL™ Code Builder for the list of compiler options for the specific optimizations.
NOTE:Intel® CPU and Intel® Graphics devices support different sets of options.
Did you find the information on this page useful?