We introduce server operating systems, which are sets of abstractions and runtime support for specialized, highperformance server applications. We have designed and are implementing a prototype server OS with support for aggressive specialization, direct device-to-device access, an event-driven organization, and dynamic compiler-assisted ILP. Using this server OS, we have constructed an HTTP server that outperforms servers running on a conventional OS by more than an order of magnitude and that can safely timeshare the hardware platform with other applications.
M. Frans Kaashoek, Dawson R. Engler, Gregory R. Ga