Process control and scheduling issues for multiprogrammed shared-memory multiprocessors
SOSP '89 Proceedings of the twelfth ACM symposium on Operating systems principles
Scheduler activations: effective kernel support for the user-level management of parallelism
SOSP '91 Proceedings of the thirteenth ACM symposium on Operating systems principles
SOSP '95 Proceedings of the fifteenth ACM symposium on Operating systems principles
OSDI '96 Proceedings of the second USENIX symposium on Operating systems design and implementation
First-class user-level threads
SOSP '91 Proceedings of the thirteenth ACM symposium on Operating systems principles
Preventing Denial-of-Service Attacks on a P-Kernel for WebOSes
HOTOS '97 Proceedings of the 6th Workshop on Hot Topics in Operating Systems (HotOS-VI)
HOTOS '97 Proceedings of the 6th Workshop on Hot Topics in Operating Systems (HotOS-VI)
Vulnerabilities in Synchronous IPC Designs
SP '03 Proceedings of the 2003 IEEE Symposium on Security and Privacy
HOTOS '01 Proceedings of the Eighth Workshop on Hot Topics in Operating Systems
Xen and the art of virtualization
SOSP '03 Proceedings of the nineteenth ACM symposium on Operating systems principles
Fast Component Interaction for Real-Time Systems
ECRTS '05 Proceedings of the 17th Euromicro Conference on Real-Time Systems
Flexible, Low-overhead Event Logging to Support Resource Scheduling
ICPADS '06 Proceedings of the 12th International Conference on Parallel and Distributed Systems - Volume 2
User-Level Fine-Grained Adaptive Real-Time Scheduling via Temporal Reflection
RTSS '06 Proceedings of the 27th IEEE International Real-Time Systems Symposium
K42: building a complete operating system
Proceedings of the 1st ACM SIGOPS/EuroSys European Conference on Computer Systems 2006
Enabling scalability and performance in a large scale CMP environment
Proceedings of the 2nd ACM SIGOPS/EuroSys European Conference on Computer Systems 2007
Energy management for hypervisor-based virtual machines
ATC'07 2007 USENIX Annual Technical Conference on Proceedings of the USENIX Annual Technical Conference
The design and implementation of an operating system to support distributed multimedia applications
IEEE Journal on Selected Areas in Communications
A real-time programmer's tour of general-purpose L4 microkernels
EURASIP Journal on Embedded Systems - Operating System Support for Embedded Real-Time Applications
A real-time programmer's tour of general-purpose L4 microkernels
EURASIP Journal on Embedded Systems - Operating System Support for Embedded Real-Time Applications
Predictable and configurable component-based scheduling in the Composite OS
ACM Transactions on Embedded Computing Systems (TECS) - Special Section on ESTIMedia'10
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With μ-kernel based systems becoming more and more prevalent, the demand for extensible resource management raises - and with it the demand for flexible thread scheduling. In this paper, we investigate the benefits and costs of a μ-kernel that exports scheduling from the kernel to user level. A key idea of our approach is to involve the user level whenever the μ-kernel encounters a situation that is ambiguous with respect to scheduling, and to permit the kernel to resolve the ambiguity based on user decisions. A further key aspect is that we rely on a generic, protection domain neutral interface between kernel and applications. For evaluation, we have developed a hierarchical user level scheduling architecture for the L4 μ-kernel, and a virtualization environment running on its top. Our environment supports Linux 2.6.9 guest operating systems on IA-32 processors. Experiments indicate an application overhead between 0 and 10 percent compared to a pure in-kernel scheduler solution, but also demonstrate that our architecture enables effective and accurate user-directed scheduling.