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2008
IEEE

VELO: A Novel Communication Engine for Ultra-Low Latency Message Transfers

10 years 1 months ago
VELO: A Novel Communication Engine for Ultra-Low Latency Message Transfers
This paper presents a novel stateless, virtualized communication engine for sub-microsecond latency. Using a Field-Programmable-Gate-Array (FPGA) based prototype we show a latency of 970 ns between two machines with our Virtualized Engine for Low Overhead (VELO). The FPGA device is directly connected to the CPUs by a HyperTransport link. The described hardware architecture is optimized for small messages and avoids the overhead typically found with Direct-Memory Access (DMA) controlled transfers. The stateless approach allows to use the hardware unit directly from many threads and processes simultaneously. It provides a secure user level communication with an extremely optimized start-up phase. Microbenchmarks results are reported both based on proprietary API and OpenMPI basis.
Heiner Litz, Holger Fröning, Mondrian Nü
Added 30 May 2010
Updated 30 May 2010
Type Conference
Year 2008
Where ICPP
Authors Heiner Litz, Holger Fröning, Mondrian Nüssle, Ulrich Brüning
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