high performance computing on graphics processing units: hgpu.org

In this paper, we propose a runtime performance prediction model for automatic selection of accelerators to execute kernels in OpenCL. The proposed method is a history-based approach that uses profile data for performance prediction. The profile data are classified into some groups, from each of which its own performance model is derived. As the execution time of a kernel depends on some runtime parameters such as kernel arguments, the proposed method first identifies parameters affecting the execution time by calculating the correlation between each parameter and the execution time. A parameter with weak correlation is used for the classification of the profile data and the selection of the performance prediction model. A parameter with strong correlation is used for building a linear model for the prediction of the kernel execution time by using only the classified profile data. Experimental results clearly indicate that the proposed method can achieve more accurate performance prediction than conventional history-based approaches because of the profile data classification.