Final report for the high performance commodity interconnects for clustered scientific and engineering computing. Part 1 of 3

PDF Version Also Available for Download.

Description

For a more detailed look, Netpipe was used to provide the signature graphs of the NDIS services over the Giganet VIA and Packet Engines Gigabit Ethernet hardware. Two Hamachi, a second generation Gigabit Ethernet NIC, were installed in place of the first generation cards. From figure 23 the Gigabit Ethernet (GigE) had significant less bandwidth performance although the theoretical line speed was equal. This means that buffering and device tuning would be necessary for such a gateway to function effectively. To examine the TCP/IP transport stack delay, the Giganet VIA latency and the Netpipe TCP stream tests were used. The ... continued below

Physical Description

6 p.

Creation Information

Hu, T.C.; Miller, M.M.; Brenkosh, J.P.; Stans, L. & Tarman, T.D. December 1, 1999.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Sponsor

Publisher

  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

For a more detailed look, Netpipe was used to provide the signature graphs of the NDIS services over the Giganet VIA and Packet Engines Gigabit Ethernet hardware. Two Hamachi, a second generation Gigabit Ethernet NIC, were installed in place of the first generation cards. From figure 23 the Gigabit Ethernet (GigE) had significant less bandwidth performance although the theoretical line speed was equal. This means that buffering and device tuning would be necessary for such a gateway to function effectively. To examine the TCP/IP transport stack delay, the Giganet VIA latency and the Netpipe TCP stream tests were used. The following assumptions were made during the analysis: (1) The latency introduced by address translation between VIA and TCP/IP is assumed to be negligible compared to the TCP/IP processing. For a real gateway, the lookup would be done via a hash table and set up a priority. (2) Transferring the data from the VIA to the TCP/IP stack would be done through a DMA copy from the VIA NIC to user memory, followed by a memory copy into the TCP/IP stack. The DMA transfer time is assumed to be negligible compared to the memory copy. The latency of the memory copy is included as part of the TCP/IP processing time. The VIA latency test provides a baseline of the inbound VIA. Both the Giganet and the Netpipe application were using the same hardware setup. The time difference between the two provides an insight as to the latency added by the TCP/IP processing. The graph shows the time difference between polling and non-polling VIA latency versus the TCP/IP processing.

Physical Description

6 p.

Notes

OSTI as DE00750029

Medium: P; Size: 6 pages

Source

  • Other Information: PBD: 1 Dec 1999

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: SAND--99-3149/1
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/750029 | External Link
  • Office of Scientific & Technical Information Report Number: 750029
  • Archival Resource Key: ark:/67531/metadc703113

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • December 1, 1999

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

Description Last Updated

  • April 11, 2017, 1:05 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 3

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Hu, T.C.; Miller, M.M.; Brenkosh, J.P.; Stans, L. & Tarman, T.D. Final report for the high performance commodity interconnects for clustered scientific and engineering computing. Part 1 of 3, report, December 1, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc703113/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.