A moving home-based software DSM system

Abstract

Absmcf--This paper describes a moving home method for home-baJnl software M b u t e d our to determine the moving its role of home. Eacb time a home node rreeives a ,,ode, it remrds the node m and the type of of the ammrds exceeds the threshold of request muuts, the home node decides wbether the non-home node whicb sends the q u a t b suitable for a new home node of the page. To evaluate our moving method, we have hplunented a prototype of DSM system from ssratcb. The result of our performance evaluation using spLAsAz shows that our method bprovd the pedormnnee of the oyer the fued home node methods.

Design and Implementation of an Agent Home Scheme Strategy for Prefetch-Based DSM Systems

“…The detailed reference related to JIAJIA can be found on the web site. 1 In JIAJIA, each shared page has a designated home node and these homes are distributed across all nodes [15]. The memory organization in JIAJIA allows programmers to flexibly control the initial distribution of the home locations of shared locations [13], as shown in Fig.…”

“…It uses a home-based [1,5,9,[11][12][13][14][15][16]35] architecture to manage the ownership of pages and uses four statuses: INV, RO, RW, and UNMAP [6,11,16] to manage the pages. In addition, JIAJIA supports barrier and lock mechanisms for data coherence, as show in Fig.…”

“…This will result in higher communication costs which in turn affects overall performance. Hence, we need special strategies to improve the performance of applications and to decrease the communication load between nodes by using available techniques such as Home Migration [1,5,7,8,12,21], Prefetching [17,23,25,32,35], Write Detection [14], Reducing Message Overhead [12,15], among others [18].…”

On the Design and Implementation of an Effective Prefetch Strategy for DSM Systems

“…The second scheme is homeless-based, which means that the host that accessed a page most recently becomes the owner of that accessed page. The third scheme is migration home [1,3] where the owner of pages changes to the host that modified the page most recently. When the system changes such page ownership, only owner can directly access that page, and other hosts need to request owner if they want to access that particular page.…”

“…DSM systems provide the abstraction of shared address space among computers locally interconnected: private physical memory on each host are interconnected to form a global virtual memory. Such abstraction makes non-uniform memory access (NUMA) multiprocessors more usable and the deployment of networks of workstations (NOWs) as a parallel multi-computer [1,[13][14][15][16]19] possible. However, the overall performance of a DSM system is influenced by the coherence scheme.…”