A multikernel operating system treats a multi-core machine as a network of independent cores, as if it were a distributed system. It does not assume shared memory but rather implements inter-process communications as message-passing.Baumann et al., "The Multikernel: a new OS architecture for scalable multicore systems", to appear in 22nd Symposium on Operating Systems Principles (2009)The Barrelfish operating system, http://www.barrelfish.org/. Barrelfish was the first operating system to be described as a multikernel.
See also Amoeba distributed operating system Distributed operating system eMCOSeSOL eMCOS distributed kernel, https://www.esol.com/embedded/emcos.html
References