Practical use of two kinds of Huge Page

On the multi-tasking system, the numbers of applications which execute concurrently are increasing and the memories which each application need are also increasing. The memories of a node are getting bigger and bigger to satisfy these demands. 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 regarding to execution speed. But it cause large useless unused memories. Then we proposed two methods which can use Huge Page while saving memories on IA-64.. One of them fill a fragments which result from the use of large Huge Page with smaller Huge Page, another makes it possible to use the second HugeTLBfs (HugeTLBfs2). As a result of experimentation, proposed methods show the same speed as the original HugeTLBfs and good results in regarding to memory requirements.