In Figure 11~13, we use one computation-intensive application and one multimedia application(MP3 decoding program described in Section 2). As shown in Figure 11, GPU/GPU is not the best execution method in this case. CPU/GPU execution method shows the best performance. Because the GPU cannot execute two different types of applications efficiently, the GPU/GPU method
shows worse execution time than the CPU/GPU method where the MP3 decoding program is assigned to the CPU and the computation-intensive application is assigned to the GPU. In the GPU/GPU execution method, the performance is degraded, because one application occupies the GPU whereas the other application cannot be executed. The CPU/GPU method is more effective than the GPU/GPU method, since each processing unit executes one application efficiently. However, the GPU/CPU
execution method shows worse performance than the CPU/GPU method, because the MP3 decoding program requiring low computation power is assigned to the GPU and the computationintensive
application is assigned to the CPU. Therefore, we can know that the system performance can be maximized when the computation-intensive applications are assigned to the GPU and the time-consuming applications such as multimedia applications are assigned to the CPU. Figure 12 is similar to Figure 11, because the energy consumption is proportional to the execution time.