Improvement of parallel processing performance by using two kinds of Huge Page

A main memory capacity in PC continues to increase because the memory requirements which applications need get bigger and bigger. It is easy to expand main memory. But TLB is very scarce as before. Under these circumstances, the uses of Huge Page reduce TLB misses by reducing the numbers of needed entries of TLB, consequently give applications which need large memories a good effect in regard to execution speed. But the uses of Huge Page cause large useless memory because operating system round up used memory to a multiple of Huge Page size. Then we propose a method which can use Huge Page while saving memories on IA-64. This proposed method allocates another smaller Huge Page which we added this time to a fragment in the back part of used memory. As a result of experimentation, proposed method show the same speed as the original system and good results in regard to memory requirements. This time we applied this proposed method to PC cluster as parallel processing programs need large memories generally and measured parallel processing performance.