Hybrid Resource Control of Active Extensions
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Scan day: 16 February 2014 UTC
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Description: Combines dynamic and static checking; an extension of Click modular router, customized for active networking in Janos active network OS. Coded in Cyclone. Downloads: paper in PDF, Postscript gzip; slides in PDF, PowerPoint.
Hybrid Resource Control of Active Extensions Hybrid Resource Control of Active Extensions 50 S. Central Campus Drive Rm. 3190 Salt Lake City, Utah 84112-9205 USA The ability of active networks technology to allow customized router computation critically depends on having resource control techniques that prevent buggy, malicious, or greedy code from affecting the integrity or availability of node resources. It is hard to choose between static and dynamic checking for resource control. Dynamic checking has the advantage of basing its decisions on precise real-time information about what the extension is doing but causes runtime overhead and asynchronous termination. Static checking, on the other hand, has the advantage of avoiding asynchronous termination and runtime overhead, but is overly conservative. This paper presents a hybrid solution: static checking is used to reject extremely resource-greedy code from the kernel fast path, while dynamic checking is used to enforce overall resource control. This hybrid solution reduces runtime overhead and avoids the problem of asynchronous termination by delaying extension termination until times when no extension code is running, i.e., between processing of packets.
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| Page title: | Hybrid Resource Control of Active Extensions |
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| NS | Name Servers: NS.UTAH.EDU 128.110.124.120 FIBER.UTAH.EDU 128.110.132.99 |
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| Date | activated: 16-Dec-1986 last updated: 14-Jan-2014 expires: 31-Jul-2014 |