Comparative analysis of high-performance clusters' communication environments using HPL test

We develop the system software for high-performance clusters and build such clusters using our original methodology. Design study is performed on basis of the analytical models of the cluster (a modification of the well-known LogGP model) and test benchmark being used. In present paper different communication environments being used in high performance clusters are compared. The notion of cluster's efficiency is defined as the ratio between peak and actual performances of the cluster. The results of comparative analysis of the efficiency of clusters using Myrinet, Fast Ethernet and Gigabit Ethernet, as well as the results of comparative analysis of the efficiency of clusters forming Topi00 and Myrinet-clusters built in the Institute are discussed. Presently we have built several clusters including 64 dual Xeon 3.06 GHz Myrinet-cluster for National Academy of Sciences of the Republic of Armenia. Oscar package is used as the control system, some original software being added.