The Experts below are selected from a list of 7491 Experts worldwide ranked by ideXlab platform
Dhabaleswar K. Panda - One of the best experts on this subject based on the ideXlab platform.
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performance characterization of a 10 Gigabit Ethernet toe
High Performance Interconnects, 2005Co-Authors: Wu-chun Feng, Pavan Balaji, C. Baron, Laxmi N. Bhuyan, Dhabaleswar K. PandaAbstract:Though traditional Ethernet based network architectures such as Gigabit Ethernet have suffered from a huge performance difference as compared to other high performance networks (e.g, InfiniBand, Quadrics, Myrinet), Ethernet has continued to be the most widely used network architecture today. This trend is mainly attributed to the low cost of the network components and their backward compatibility with the existing Ethernet infrastructure. With the advent of 10-Gigabit Ethernet and TCP offload engines (TOEs), whether this performance gap be bridged is an open question. In this paper, we present a detailed performance evaluation of the Chelsio T110 10-Gigabit Ethernet adapter with TOE. We have done performance evaluations in three broad categories: (i) detailed micro-benchmark performance evaluation at the sockets layer, (ii) performance evaluation of the message passing interface (MPI) stack atop the sockets interface, and (iii) application-level evaluations using the Apache Web server. Our experimental results demonstrate latency as low as 8.9 /spl mu/s and throughput of nearly 7.6 Gbps for these adapters. Further, we see an order-of-magnitude improvement in the performance of the Apache Web server while utilizing the TOE as compared to the basic 10-Gigabit Ethernet adapter without TOE.
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emp zero copy os bypass nic driven Gigabit Ethernet message passing
Conference on High Performance Computing (Supercomputing), 2001Co-Authors: Piyush Shivam, P Wyckoff, Dhabaleswar K. PandaAbstract:Modern interconnects like Myrinet and Gigabit Ethernet offer Gb/s speeds which has put the onus of reducing the communication latency on messaging software. This has led to the development of OS bypass protocols which removed the kernel from the critical path and hence reduced the end-to-end latency. With the advent of programmable NICs, many aspects of protocol processing can be offloaded from user space to the NIC leaving the host processor to dedicate more cycles to the application. Many host-offload messaging systems exist for Myrinet; however, nothing similar exits for Gigabit Ethernet. In this paper we propose Ethernet Message Passing (EMP), a completely new zero-copy, OS-bypass messaging layer for Gigabit Ethernet on Alteon NICs where the entire protocol processing is done at the NIC. This messaging system delivers very good performance (latency of 23 us, and throughput of 880 Mb/s). To the best of our knowledge, this is the first NIC-level implementation of a zero-copy message passing layer for Gigabit Ethernet.
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Hot Interconnects - Performance characterization of a 10-Gigabit Ethernet TOE
13th Symposium on High Performance Interconnects (HOTI'05), 1Co-Authors: Wu-chun Feng, Pavan Balaji, C. Baron, Laxmi N. Bhuyan, Dhabaleswar K. PandaAbstract:Though traditional Ethernet based network architectures such as Gigabit Ethernet have suffered from a huge performance difference as compared to other high performance networks (e.g, InfiniBand, Quadrics, Myrinet), Ethernet has continued to be the most widely used network architecture today. This trend is mainly attributed to the low cost of the network components and their backward compatibility with the existing Ethernet infrastructure. With the advent of 10-Gigabit Ethernet and TCP offload engines (TOEs), whether this performance gap be bridged is an open question. In this paper, we present a detailed performance evaluation of the Chelsio T110 10-Gigabit Ethernet adapter with TOE. We have done performance evaluations in three broad categories: (i) detailed micro-benchmark performance evaluation at the sockets layer, (ii) performance evaluation of the message passing interface (MPI) stack atop the sockets interface, and (iii) application-level evaluations using the Apache Web server. Our experimental results demonstrate latency as low as 8.9 /spl mu/s and throughput of nearly 7.6 Gbps for these adapters. Further, we see an order-of-magnitude improvement in the performance of the Apache Web server while utilizing the TOE as compared to the basic 10-Gigabit Ethernet adapter without TOE.
Giovanni Chiola - One of the best experts on this subject based on the ideXlab platform.
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PVM/MPI - GAMMA and MPI/GAMMA on Gigabit Ethernet
Recent Advances in Parallel Virtual Machine and Message Passing Interface, 2000Co-Authors: Giuseppe Ciaccio, Giovanni ChiolaAbstract:The Genoa Active Message MAchine (GAMMA) is a light-weight communication system based on the Active Ports paradigm, originally designed for efficient implementation over low-cost Fast Ethernet interconnects. A very efficient porting of MPICH atop GAMMA as been recently completed, providing unprecedented messaging performance over the cheapest cluster computing technology currently available. In this paper we describe the recently completed porting of GAMMA to the GNIC-II Gigabit Ethernet adapters by Packet Engines. A combination of less than 10 µs latency and more than 93 MByte/s throughput demonstrates the possibility for Gigabit Ethernet and GAMMA to yield messaging performance comparable to the ones from many lightweight protocols running on Myrinet. This result is of interest, given the envisaged drop in cost of Gigabit Ethernet due to the forthcoming transition from fiber optic to UTP cabling and ever increasing mass market production of such standard interconnect.
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CLUSTER - Low-cost Gigabit Ethernet at Work
Cluster Computing, 2000Co-Authors: Giuseppe Ciaccio, Giovanni ChiolaAbstract:In this paper we report about the recently completed porting of the Genoa Active Message MAchine (GAMMA) to the Netgear GA620 Gigabit Ethernet adapter. Such device is a low-cost (less than 300 US dollars at the time of writing) Gigabit Ethernet adapter with a state-of-art internal architecture based on two programmable on-board processors and substantial amount of on-board RAM, which makes this product a very appealing, cheap alternative to Myrinet. A combination of low end-to-end latency (32 s) and high transmission throughput (103 MByte/s end-to-end) demonstrates the potential for Gigabit Ethernet lightweight protocols to yield messaging performance comparable to the best Myrinet protocols. This result is of interest, given the envisaged drop in cost of Gigabit Ethernet due to the forthcoming transition from fiber optic to UTP cabling and ever increasing mass market production of such standard interconnect.
Du Huijun - One of the best experts on this subject based on the ideXlab platform.
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The QoS Analysis of Gigabit Ethernet in Campus Network
Computer Engineering, 2000Co-Authors: Du HuijunAbstract:The technology of Gigabit Ethernet in campus network. how does its QoS assure. which level it achieve? This is a center of problem to be discussed. In this condition.this paper analyses a few kinds of combined techniques which are adopted by the QoS of Gigabit Ethernet. and compares these techniques with QoS of ATM.
Giuseppe Ciaccio - One of the best experts on this subject based on the ideXlab platform.
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PVM/MPI - GAMMA and MPI/GAMMA on Gigabit Ethernet
Recent Advances in Parallel Virtual Machine and Message Passing Interface, 2000Co-Authors: Giuseppe Ciaccio, Giovanni ChiolaAbstract:The Genoa Active Message MAchine (GAMMA) is a light-weight communication system based on the Active Ports paradigm, originally designed for efficient implementation over low-cost Fast Ethernet interconnects. A very efficient porting of MPICH atop GAMMA as been recently completed, providing unprecedented messaging performance over the cheapest cluster computing technology currently available. In this paper we describe the recently completed porting of GAMMA to the GNIC-II Gigabit Ethernet adapters by Packet Engines. A combination of less than 10 µs latency and more than 93 MByte/s throughput demonstrates the possibility for Gigabit Ethernet and GAMMA to yield messaging performance comparable to the ones from many lightweight protocols running on Myrinet. This result is of interest, given the envisaged drop in cost of Gigabit Ethernet due to the forthcoming transition from fiber optic to UTP cabling and ever increasing mass market production of such standard interconnect.
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CLUSTER - Low-cost Gigabit Ethernet at Work
Cluster Computing, 2000Co-Authors: Giuseppe Ciaccio, Giovanni ChiolaAbstract:In this paper we report about the recently completed porting of the Genoa Active Message MAchine (GAMMA) to the Netgear GA620 Gigabit Ethernet adapter. Such device is a low-cost (less than 300 US dollars at the time of writing) Gigabit Ethernet adapter with a state-of-art internal architecture based on two programmable on-board processors and substantial amount of on-board RAM, which makes this product a very appealing, cheap alternative to Myrinet. A combination of low end-to-end latency (32 s) and high transmission throughput (103 MByte/s end-to-end) demonstrates the potential for Gigabit Ethernet lightweight protocols to yield messaging performance comparable to the best Myrinet protocols. This result is of interest, given the envisaged drop in cost of Gigabit Ethernet due to the forthcoming transition from fiber optic to UTP cabling and ever increasing mass market production of such standard interconnect.
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LCN - Exploiting Gigabit Ethernet capacity for cluster applications
27th Annual IEEE Conference on Local Computer Networks 2002. Proceedings. LCN 2002., 1Co-Authors: M. Ehlert, Giuseppe Ciaccio, Bettina SchnorAbstract:In this paper we report about the recently completed porting of GAMMA to the Netgear GA621 Gigabit Ethernet adapter, and provide a comparison among GAMMA, MPI/GAMMA, TCP/IP and MPICH/TCP, based on the Netgear GA621 and the older Netgear GA620 network adapters and using different device drivers, in a Gigabit Ethernet cluster of PC running Linux 2.4. GAMMA (the Genoa Active Message Machine) is a lightweight messaging system based on an active message-like paradigm, originally designed for efficient exploitation of Fast Ethernet interconnects. The comparison includes simple latency/bandwidth evaluation of the messaging systems on both adapters, as well as performance comparisons based on the NAS Parallel Benchmarks and an end-user fluid dynamics application called Modular Ocean Model (MOM). The analysis of results provides useful hints concerning the efficient use of Gigabit Ethernet with clusters of PC. In particular, it emerges that GAMMA on the GA621 adapter, with a combination of low end-to-end latency (8.5 /spl mu/s) and high throughput (118.4 MByte/s), provides a performing, cost-effective alternative to proprietary high-speed networks, e.g. Myrinet, for a wide range of cluster computing applications.
Richard Hughes-jones - One of the best experts on this subject based on the ideXlab platform.
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Performance of 1 and 10 Gigabit Ethernet cards with server quality motherboards
Future Generation Computer Systems, 2005Co-Authors: Richard Hughes-jones, Peter Clarke, Steven DallisonAbstract:System administrators often assume that just by plugging in a Gigabit Ethernet Interface, the system will deliver line rate performance; sadly this is not often the case. The behaviour of various 1 and 10 Gigabit Ethernet Network Interface cards (NICs) has been investigated using server quality motherboards. The latency, throughput, and the activity on the PCI buses and Gigabit Ethernet links were chosen as performance indicators. The tests were performed using two PCs connected back-to-back and sending UDP/IP frames from one to the other. This paper shows the importance of having a good combination of memory and peripheral bus chipset, Ethernet Interface, CPU power, good driver, and operating system designs and proper configuration to achieve and sustain Gigabit transfer rates. With these considerations taken into account, and suitably designed hardware, transfers can operate at Gigabit and multi-Gigabit speeds. Some recommendations are given for high performance data servers.
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Performance Measurements on Gigabit Ethernet NICs and Server Quality Motherboards
2003Co-Authors: Richard Hughes-jonesAbstract:The behaviour of various Gigabit Ethernet NIC’s and server quality motherboards has been investigated. The latency, throughput, and the activity on the PCI buses and Gigabit Ethernet links were chosen as perfo rmance indicators. The tests were performed using two PCs connected back-to-back and sending UDP/IP frames from one to the other. This paper shows the importance of the NIC-PCI memory bus chipset combination, CPU power, good driver / operating system design and configuration to achieve and sustain Gigabit transfer rates. With these considerations taken into account, and suitably designed hardware, transfers can operate at G igabit speeds. Some recommendations are given for potential high performance data servers.
