A Caching Model of Operating System Kernel Functionality
Stanford Cache Kernel, supervisor-mode component of V++ OS; caches system objects (threads, address spaces) to raise performance; microkernel alternative, performance equals normal monolithic OSs, yet gives application-level control of system resources, more modularity, scalability, smaller size, means of fault containment.
Using Kernel Extensions to Decrease the Latency of User-Level Communication Primitives
Suggests solving networking and distributed systems latency via operating system extensibility; University of New Mexico Technical Report.
Extensible Operating Systems
Brief description, and on-site links to descriptions of Choices, Exokernel, GLUnix, VINO, SPIN.
SPIN
Dynamically extensible, Exokernel-based, provides many core services: scheduler, kernel threads, domains, event dispatcher, security mechanisms, primitive VM operations. Blurs distinction between kernels and applications, which traditionally live in user-level address spaces, separated from kernel resources and services by an expensive protection boundary. Lets applications specialize the kernel by dynamically linking new code into running systems.
Open Kernel Environment: OKE
Lets non-root users load native, fully optimized code in kernels. OKE Corral: active network environment, lets 3rd-party code manage code organization at any level of nodes. LEGO-like model from MIT Click router. Description, papers, release page, contacts. [Open Source, GPL]
BITS
The Component Based Operating System: based on describing system resources as independent components, lets applications implement their own abstractions, define their own protection schemes, participate in resource management.
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