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Cluster 2005 |
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A Performance Analysis of the Ammasso RDMA Enabled
Ethernet Adapter and its iWARP API
Dennis Dalessandro, Pete Wyckoff
RAIT Workshop
IEEE
International Conference on Cluster Computing (Cluster 2005)
Boston, Massachusetts, USA, September 26, 2005
Network speeds are increasing well beyond the capabilities of
today’s CPUs to efficiently handle the traffic. This bottleneck at the CPU causes the
processor to spend more of its time handling communication and less time on
actual processing. As network speeds reach 10 Gb/s and more, the CPU
simply can not keep up with the data. Various methods have been proposed to
solve this problem. High performance interconnects, such as Infiniband,
have been developed that rely on RDMA and protocol offload
in order to achieve higher throughput and lower latency. In this paper we
evaluate the feasibility of a similar approach which, unlike existing high
performance interconnects, requires no special infrastructure. RDMA over
Ethernet, otherwise known as iWARP, facilitates the
zero copy exchange of data over ordinary local area networks. Since it is based
on TCP, iWARP enables RDMA in the wide area network
as well. This paper provides a look into the performance of one of the earliest
commodity implementations of this emerging technology, the Ammasso
1100 RNIC.
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Maintainer: rrgerber@softconf.com
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