We argue that a new OS for a multicore machine should be designed ground-up as a distributed system, using concepts from that \ufb01eld. Modern hardware resembles a networked system even more than past large multiprocessors: in addition to familiar latency e\ufb00ects, it exhibits node heterogeneity and dynamic membership changes.<\/p>\n
Cache coherence protocols encourage OS designers to selectively ignore this, except for limited performance reasons. Commodity OS designs have mostly assumed \ufb01xed, uniform CPU architectures and memory systems.<\/p>\n","protected":false},"excerpt":{"rendered":"
We argue that a new OS for a multicore machine should be designed ground-up as a distributed system, using concepts from that \ufb01eld. Modern hardware resembles a networked system even more than past large multiprocessors: in addition to familiar latency e\ufb00ects, it exhibits node heterogeneity and dynamic membership changes. Cache coherence protocols encourage OS designers 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