Preliminary comparison between the single-threaded andmulti-threaded RHODOS microkernel

摘要

RHODOS is a distributed operating system based on the clientnserver model and a microkernel paradigm. It is a research tool designednto be capable of implementing and evaluating different mechanisms andnpolicies that are proposed by researchers. To maintain suitability fornthis task, the RHODOS microkernel has recently been upgraded from singlento multi threaded operation. However, this upgrading has resulted in ansignificant number of changes to the operation of some system calls andninterrupt handlers. The paper compares the two versions of the RHODOSnmicrokernel, and quantifies the changes that have been made withnperformance timings. This work is very important, as it permitsnresearchers to understand the characteristics and performancenlimitations of the user and kernel processes they create