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Tuesday, October 14 • 12:15pm - 1:05pm
Improving Application Responsiveness and I/O Latency With the BFQ I/O Scheduler - Paolo Valente, University of Modena and Reggio Emilia, Italy

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BFQ (Budget Fair Queueing) is a storage-I/O scheduler with some new or
improved features with respect to existing research and production
schedulers. One of the nice features of BFQ is that it guarantees a
high application responsiveness, regardless of the background I/O
workload. BFQ also guarantees a low latency to soft real-time
applications, such as multimedia players. These features do not come
at the cost of any loss of throughput, with respect to existing I/O
schedulers. On the contrary, BFQ even outperforms the latter with some
combinations of workloads and devices. Finally, BFQ seems to be on the
right track to be merged into mainline, and replace the current
default I/O scheduler. In this presentation, Paolo Valente will show
BFQ in action, and describe some of its inner workings.

Speakers
avatar for Paolo Valente

Paolo Valente

Assistant Professor of CS, University of Modena and Reggio Emilia, Italy
Paolo Valente is an Assistant Professor of Computer Science at the University of Modena and Reggio Emilia, Italy. Some of his activities focus on scheduling algorithms for transmission links, storage devices, and CPUs. As for transmission links, Paolo is one of the authors of the QFQ packet scheduler, which has been in the Linux kernel until 3.7, after that it has been replaced by QFQ+, a faster variant defined and implemented by Paolo himself... Read More →


Tuesday October 14, 2014 12:15pm - 1:05pm
Room 14