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Title: Configurable Crossbar Switch for Deterministic, Low-latency Inter-blade Communications in a MicroTCA Platform

Abstract

As MicroTCA expands into applications beyond the telecommunications industry from which it originated, it faces new challenges in the area of inter-blade communications. The ability to achieve deterministic, low-latency communications between blades is critical to realizing a scalable architecture. In the past, legacy bus architectures accomplished inter-blade communications using dedicated parallel buses across the backplane. Because of limited fabric resources on its backplane, MicroTCA uses the carrier hub (MCH) for this purpose. Unfortunately, MCH products from commercial vendors are limited to standard bus protocols such as PCI Express, Serial Rapid IO and 10/40GbE. While these protocols have exceptional throughput capability, they are neither deterministic nor necessarily low-latency. To overcome this limitation, an MCH has been developed based on the Xilinx Virtex-7 690T FPGA. This MCH provides the system architect/developer complete flexibility in both the interface protocol and routing of information between blades. In this paper, we present the application of this configurable MCH concept to the Machine Protection System under development for the Spallation Neutron Sources's proton accelerator. Specifically, we demonstrate the use of the configurable MCH as a 12x4-lane crossbar switch using the Aurora protocol to achieve a deterministic, low-latency data link. In this configuration, the crossbar has anmore » aggregate bandwidth of 48 GB/s.« less

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2]
  1. Vadatech Inc. (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1400151
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Program Document
Resource Relation:
Related Information: Published in Embedded Systems Engineering Magazine
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING

Citation Formats

Karamooz, Saeed, Breeding, John Eric, and Justice, T Alan. Configurable Crossbar Switch for Deterministic, Low-latency Inter-blade Communications in a MicroTCA Platform. United States: N. p., 2017. Web.
Karamooz, Saeed, Breeding, John Eric, & Justice, T Alan. Configurable Crossbar Switch for Deterministic, Low-latency Inter-blade Communications in a MicroTCA Platform. United States.
Karamooz, Saeed, Breeding, John Eric, and Justice, T Alan. Tue . "Configurable Crossbar Switch for Deterministic, Low-latency Inter-blade Communications in a MicroTCA Platform". United States. https://www.osti.gov/servlets/purl/1400151.
@article{osti_1400151,
title = {Configurable Crossbar Switch for Deterministic, Low-latency Inter-blade Communications in a MicroTCA Platform},
author = {Karamooz, Saeed and Breeding, John Eric and Justice, T Alan},
abstractNote = {As MicroTCA expands into applications beyond the telecommunications industry from which it originated, it faces new challenges in the area of inter-blade communications. The ability to achieve deterministic, low-latency communications between blades is critical to realizing a scalable architecture. In the past, legacy bus architectures accomplished inter-blade communications using dedicated parallel buses across the backplane. Because of limited fabric resources on its backplane, MicroTCA uses the carrier hub (MCH) for this purpose. Unfortunately, MCH products from commercial vendors are limited to standard bus protocols such as PCI Express, Serial Rapid IO and 10/40GbE. While these protocols have exceptional throughput capability, they are neither deterministic nor necessarily low-latency. To overcome this limitation, an MCH has been developed based on the Xilinx Virtex-7 690T FPGA. This MCH provides the system architect/developer complete flexibility in both the interface protocol and routing of information between blades. In this paper, we present the application of this configurable MCH concept to the Machine Protection System under development for the Spallation Neutron Sources's proton accelerator. Specifically, we demonstrate the use of the configurable MCH as a 12x4-lane crossbar switch using the Aurora protocol to achieve a deterministic, low-latency data link. In this configuration, the crossbar has an aggregate bandwidth of 48 GB/s.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {8}
}

Program Document:
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