Wrapped system call in communication and execution fusion OS: CEFOS

This paper proposes an operating system CEFOS (Communication and Execution Fusion OS), which fuses interprocessor communication and intra processor computation. Fusion of communications and internal executions is achieved both in executions and function interfaces in CEFOS. CEFOS is based on a fine-grain multi-threading approach. In the fine-grain thread control, one of the major problems is how to reduce the frequency of context switching and communication between user process and CEFOS Kernel. The important point to resolve this problem is to design the environment which supports an efficient cooperation environment between user process and CEFOS kernel. We propose a Display Request and Data (DRD) function and Wrapped System Call (WSC) mechanism with DRD function, which provide efficient cooperation between user process and CEFOS Kernel. DRD and WSC reduce the number of invocations from user process threads to the OS kernel and achieve high speeds thread switching