Network Interface Sharing with an Experimental Gang Scheduler on Cenju-3/de

We have implemented an experimental gang sched-uler on Cenju-3/DEE1] in order to investigate ef-cient scheduling schemes for multiple user environment with high performance communication on parallel machines. The Cenju-3/DE system provides user-level inter-processor communication mechanisms for a single user. It realizes high performance communication, but cannot be shared among multiple users. In order to realize a multiple user environment we have implemented a network interface sharing mechanism, and examined its behavior with the gang scheduling. In this paper, we report our early evaluation of the gang scheduler and highlight some issues we faced.