University of Cambridge > > Computer Laboratory NetOS Group Talklets > Repeatable execution, and why operating systems should support it

Repeatable execution, and why operating systems should support it

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If you have a question about this talk, please contact Heidi Howard.

Many applications benefit from repeatability: being able to run the same program deterministically on the same input, hence seeing the same output, across both time (reproducing an earlier run) and space (reproducing the same execution on a different machine, say). Two major use cases are bug reproduction in everyday software, and distribution of scientific software. In this very informal talklet I will sketch a case for supporting repeatability somewhere near the core of the operating system, rather than (as at present) in user-space tools (e.g. rr, UndoDB, CDE ) or hypervisors (revirt, VMware Workstation). Time permitting, I’ll speculate wildly about the potential benefits to storage subsystems, toolchain design, software build and deployment, compiler bootstrapping, debugging, and the optimisation of recurring time/space trade-offs.

This talk is part of the Computer Laboratory NetOS Group Talklets series.

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