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.