Eliminating receive livelock in an interrupt-driven kernel

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Eliminating receive livelock in an interrupt-driven kernel (1997)

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by Jeffrey Mogul , Dec Western , Jeffrey C. Mogul , K. K. Ramakrishnan

Venue:	ACM Transactions on Computer Systems
Citations:	321 - 5 self

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@ARTICLE{Mogul97eliminatingreceive,
    author = {Jeffrey Mogul and Dec Western and Jeffrey C. Mogul and K. K. Ramakrishnan},
    title = {Eliminating receive livelock in an interrupt-driven kernel},
    journal = {ACM Transactions on Computer Systems},
    year = {1997},
    volume = {15},
    pages = {217--252}
}

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Abstract

Most operating systems use interface interrupts to schedule network tasks. Interrupt-driven systems can provide low overhead and good latency at low of-fered load, but degrade significantly at higher arrival rates unless care is taken to prevent several pathologies. These are various forms of receive livelock, in which the system spends all its time processing interrupts, to the exclusion of other neces-sary tasks. Under extreme conditions, no packets are delivered to the user application or the output of the system. To avoid livelock and related problems, an operat-ing system must schedule network interrupt handling as carefully as it schedules process execution. We modified an interrupt-driven networking implemen-tation to do so; this eliminates receive livelock without degrading other aspects of system performance. We present measurements demonstrating the success of our approach. 1.

Keyphrases

receive livelock interrupt-driven kernel good latency interrupt-driven system several pathology low of-fered load network interrupt handling various form process execution low overhead system performance extreme condition interrupt-driven networking implemen-tation interface interrupt present measurement neces-sary task user application related problem time processing interrupt network task arrival rate operat-ing system

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