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K42
K42 is an open-source research operating system for cache-coherent 64-bit multiprocessor systems. It was developed primarily at IBM Thomas J. Watson Research Center in collaboration with University of Toronto and University of New Mexico. The main focus of this OS is to address performance and scalability issues of system software on large-scale, shared memory, NUMA multiprocessor computers.
K42 utilizes a microkernel architecture rather than the traditional monolithic kernel design. K42 consists of a small exception-handling component that serves as the microkernel, a fast IPC mechanism called protected procedure call (PPC), and servers for most other components of the operating system. These servers exist in separate address spaces and rely upon the fast IPC mechanism for communication with the microkernel and other servers.
==History==
The core of K42 is based on the University of Toronto's Tornado Operating System.〔(【引用サイトリンク】url=http://www.eecg.toronto.edu/EECG/RESEARCH/ParallelSys/tornado.html )〕 K42 is the university's third generation of research on scalable operating systems. Tornado OS / NUMAchine Multiprocessor〔(【引用サイトリンク】url=http://www.eecg.toronto.edu/parallel/parallel/NUMA.Welcome.html )〕 was the second generation and Hurricane OS〔(【引用サイトリンク】url=http://www.eecg.toronto.edu/parallel/hurricane.html )〕 / Hector Multiprocessor〔(【引用サイトリンク】url=http://www.eecg.toronto.edu/parallel/hector.html )〕 was the first generation.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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