cl_gemm_itt

OpenCL(TM) GEMM with Code Annotation

Overview

This sample application performs general matrix multiplication using OpenCL(TM) CPU or GPU device. Its code is annotated with Instrumentation and Tracing Technology API (ITT API) that allows to highligh its regions-of-interest while using Intel(R) VTune(TM) Analyzer.

OpenCL Matrix Multiplication (matrix size: 1024 x 1024, repeats 4 times)
Target device: Intel(R) Gen9 HD Graphics NEO
Matrix multiplication time: 0.18465 sec
Results are CORRECT with accuracy: 4.90573e-06
Matrix multiplication time: 0.1293 sec
Results are CORRECT with accuracy: 4.90573e-06
Matrix multiplication time: 0.103855 sec
Results are CORRECT with accuracy: 4.90573e-06
Matrix multiplication time: 0.0909481 sec
Results are CORRECT with accuracy: 4.90573e-06
Total execution time: 0.739879 sec

Supported OS

• Linux
• Windows

Prerequisites

• CMake (version 3.12 and above)
• Git (version 1.8 and above)
• Python (version 2.7 and above)
• OpenCL(TM) ICD Loader
• Intel(R) Graphics Compute Runtime for oneAPI Level Zero and OpenCL(TM) Driver

Build and Run

Linux

Run the following commands to build the sample:

cd <pti>/samples/cl_gemm_itt
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make

Use this command line to run the application:

./bin/cl_gemm_itt [cpu|gpu] [matrix_size] [repeat_count]

Windows

Use Microsoft* Visual Studio x64 command prompt to run the following commands and build the sample:

cd <pti>\samples\cl_gemm_itt
mkdir build
cd build
cmake -G "NMake Makefiles" -DCMAKE_BUILD_TYPE=Release -DCMAKE_LIBRARY_PATH=<opencl_icd_lib_path> ..
nmake

Use this command line to run the application:

cl_gemm_itt.exe [cpu|gpu] [matrix_size] [repeats_count]

Use Intel(R) VTune(TM) Analyzer to profile this application in order to look into its regions-of-interest.