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Topic: TCP Offload Engine


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In the News (Wed 23 Dec 09)

  
  LWN: Linux and TCP offload engines
For years, the networking maintainers have felt that TOE support is the kind of patch which should not be accepted, and the current implementation appears not to have changed their minds.
TOE appears to be one of those ideas which never really goes away, however, so chances are good that we will see this debate again in the future.
For example, an offload which allowed the important TCP control decisions to be made by the CPU would allow most of the advances in the Linux kernel whilst not increasing CPU load overly (since connections rarely alter rate or state).
lwn.net /Articles/148697   (2150 words)

  
  TCP Offload Engine - Wikipedia, the free encyclopedia
TCP Offload Engine or TOE is a technology for the acceleration of TCP/IP, specifically by moving TCP/IP processing to a separate dedicated controller off the main host CPU, the overall system TCP/IP performance can be improved.
TOE offers performance gains specifically for servers and server applications which typically have to support a large and changing number of simultaneous connections, one example is a web server, where in certain versions of the HTTP protocol it requires a new TCP connection for each object (i.e.
The term, TOE, is often used to refer to the NIC itself, although it more accurately refers only to the integrated circuit included on the card which processes the TCP headers.
en.wikipedia.org /wiki/TCP_Offload_Engine   (593 words)

  
 TCP/IP offload engine - a Whatis.com definition
The TCP/IP offload engine (TOE for short) is a technology that is gaining popularity in high-speed Ethernet systems for the purpose of optimizing throughput.
TOE components are incorporated into one of the printed circuit boards, such as the network interface card (NIC) or the host bus adapter (HBA).
TOE solves this problem by removing the burden (offloading) from the microprocessor and I/O subsystem.
whatis.techtarget.com /gDefinition/0,294236,sid7_gci935358,00.html   (223 words)

  
 TCP segmentation offloading - Wikipedia, the free encyclopedia
TCP segmentation offload or TSO is a technology for reducing CPU overhead of TCP/IP on fast networks.
Segmentation is often done by the TCP protocol in the host computer.
Offloading this work to the network card is called TCP segmentation offload (TSO).
en.wikipedia.org /wiki/TCP_segmentation_offloading   (238 words)

  
 Highbeam Encyclopedia - Search Results for offload
TOE Technology Innovator Alacritech Marks Patent Milestone; Five Patents Solidify Alacritech's Position as TCP/IP Offload and Acceleration Leader.
TCP analysis.(Network analysis products)(Alacritech's TCP/IP Offload Engine Analyzer is a monitoring program that helps administrators determine the need for TCP offload on Microsoft Windows-based systems)
QLogic Partnering with Alacritech to Deliver 10 Gigabit Ethernet TOE for Linux, Microsoft Windows, and Many Others; QLogic Licensing Alacritech Patents to Incorporate into 10 Gigabit Designs for TCP Offload Across All Operating Systems.
www.encyclopedia.com /searchpool.asp?target=offload   (597 words)

  
 Beyond the Network Layer: NP-Based TCP Offloading via TCP Splicing | RTC Magazine
TCP performance of low-end devices in today’s networks continues to be limited mainly by memory and CPU speeds.
TCP processing complexity is offloaded from the host CPU to specialized TCP accelerators.
In TCP splicing, two independent TCP connections span a session: one from the client to the NP, and the second from the NP to the server.
www.rtcmagazine.com /home/article.php?id=100480   (729 words)

  
 TOE (TCP offload engine)
TOE technology aims to take the server CPU out of I/O processing by shifting TCP/IP processing tasks to the network adapter or storage device.
TOES have been proposed as an answer to the increasing demand put on servers by gigabit connections.
And the need for TOE has become especially acute with the advent of iSCSI, a standard for the transport of block-oriented storage data over Gigabit Ethernet networks.
www.networkworld.com /details/653.html   (712 words)

  
 Next gen Broadcom Gig Ethernet controller arrives
TOE support is one of the six key features on the NetXtreme II.
TOE refers to the TCP/IP protocol stack being offloaded to a dedicated controller in order to reduce TCP/IP processing overhead in servers.
The other obstacle is an all-inclusive approach to architecting TCP offload as a parallel server network protocol stack.
www.theinquirer.net /?article=16166   (842 words)

  
 TCP Offload Engine speeds processing
TOE technology consists of software extensions to existing TCP/IP stacks that enable the use of hardware data planes implemented on specialized TOE network interface cards (TNIC).
Next, the receiving system must associate the unsolicited TCP data with the appropriate application and copy the data from system buffers to the destination memory location.
TOE analysis tools are available to help administrators evaluate systems benefits in transitioning from the NIC I/O model to the TNIC I/O model.
www.networkworld.com /techinsider/2003/0707techupdate.html   (726 words)

  
 What is TCP/IP offload engine? - a definition from Whatis.com - see also: TOE
TOE components are incorporated into one of the printed circuit boards, such as the network interface card (NIC) or the host bus adapter (HBA).
TOE solves this problem by removing the burden (offloading) from the microprocessor and I/O subsystem.
The manner in which TOE is implemented depends on the needs of the customer.
searchnetworking.techtarget.com /sDefinition/0,,sid7_gci935358,00.html   (278 words)

  
 Embedded.com - A case for hard-wired TCP/IP offload
As defined by the OSI layered protocol stack (See Figure 1), TCP operates at layer four, often referred to as L4, of the OSI model and provides reliable end-to-end connections over the IP operating at layer three (L3).
TCP is required because routing over the Internet using IP does not guarantee that packets from a sender actually reach the destination.
TCP handles functions such as segmentation and reassembly of packets, packet ordering, and handling of Internet congestion situations so that the entire message sent from one entity to another reaches its destination reliably.
www.embedded.com /showArticle.jhtml?articleID=197005684   (962 words)

  
 iApplianceWeb-OEG   (Site not responding. Last check: 2007-10-20)
TCP Chimney is a Microsoft technology that allows the operating system to offload the TCP processing of selected network streams from the CPU to the network controller.
TCP processing consumes a significant amount of the host CPU cycles and as network speed rapidly increases, the need to offload this burden from the host CPU becomes more urgent.
Offload frees the host CPU for processing of applications, thus improving overall application performance.
www.iapplianceweb.com /story/OEG20040506N0001BC.htm   (456 words)

  
 The Older Gamers - TCP Offload Engine (TOE)
TOE would be an awesome protocol for computer gamers, however there are some limiting factors that make it next to impossible to utilize right now.
Second, for those who know NIC teaming, only SLB teaming is supported in TOE and there is no cross vendor teaming available because of the ways the companies have designed their protocols independently.
Finally, if you do have a system where TOE is an option, you need to be careful about resource allocation.
www.theoldergamers.com /content/view/135/31   (411 words)

  
 [No title]
Offloading these functions to dedicated hardware is essential for reliable, fast and cost-effective iSCSI SANs.
Taking offload technology a step further, full state-based hardware offload engines eliminate expensive discrete processors or controllers with multiple embedded processors currently used in iSCSI HBAs and network adapters.
The result is the QLogic full state-based offload engine architecture is uniquely scalable to 10Gb.
www.byteandswitch.com /document.asp?doc_id=24478&print=true   (747 words)

  
 Chelsio's 10-Gbit/s Ethernet Card Speeds TCP - Networking Center - Network Computing
The PCI-X card, launched at the Grid Today 2004 conference in Philadelphia, is based on a single-engine ASIC dubbed the Terminator, with a TCP offload engine optimized for grid computing and data center applications.
Chelsio's founders came from SGI's Protocol Engines Inc. subsidiary and were responsible for designing the SGI Origin supercomputer.
Terminator can handle 1 million concurrent TCP sessions, although the card is configured for no more than 64,000, indicating the future scalability of the architecture.
www.networkcomputing.com /channels/networkinfrastructure/20900563   (643 words)

  
 networkZONE Product Review: Chelsio Communications 10G Ethernet Adapter With On-Chip TCP Offload Engine
The company is the first 10G Ethernet adapter vendor delivering a TCP offload engine (TOE) in silicon, significantly raising the performance and latency bar for the 10G Ethernet adapter industry.
And in case you were worried, the TCP rules are all handled in a programmable fashion to ensure maximum flexibility.
The offload results appear to be dramatic, with a 10-Gbit connection producing a CPU utilization level of less than 50% using a single 2.2-GHz Opteron, and less than 15% with a 1.5-GHz Itanium chip.
www.analogzone.com /netp0524.htm   (1403 words)

  
 The Ultimate TCP Offload Engine - American History Information Guide and Reference
A TCP Offload Engine or TOE is a technology for a TCP/IP-optimized Network Interface Card (NIC).
The term, TOE, is often used to refer to the NIC itself, though it more accurately refers only to the Integrated Circuit included on the card which processes the TCP headers.
TOEs are often suggested as a way to reduce the overhead associated with new protocols like iSCSI.
www.historymania.com /american_history/TCP_Offload_Engine   (164 words)

  
 Scalable Networking Pack: Frequently Asked Questions
TCP Chimney Offload provides automated, stateful offload of Transmission Control Protocol (TCP) traffic processing to a specialized network adapter implementing a TCP Offload Engine (TOE).
A TCP Offload Engine (TOE) is a specialized and dedicated processor on a network adapter that can handle some or all of the processing of network packets.
For example, TCP Chimney Offload allows administrative configuration of TCP port numbers (source and destination) for which connections are not to be offloaded.
www.microsoft.com /technet/network/snp/faq.mspx   (1643 words)

  
 EETimes.com - Count on TCP offload engine
This type of chip handles many of the basic functions required to terminate a TCP connection, which are otherwise performed by a general-purpose CPU or NPU.
No TOE chips have yet been announced, but several vendors are working on such devices.
The problem is that TCP termination, which involves reconstructing a stream of coherent data from many independent packets, is a compute-intensive task.
www.eetimes.com /op/showArticle.jhtml?articleID=18306329   (518 words)

  
 GRIDtoday: BROADCOM TO DELIVER TCP/IP OFFLOAD TECHNOLOGY
To compensate for this dilemma and free the CPU for general computing requirements, the offloading of TCP/IP functionality to dedicated hardware is a fundamental improvement.
The combination of hardware offload for performance, and host stack for controlling the connections, results in the best OS performance while maintaining the flexibility and manageability of the Microsoft TCP stack.
Microsoft's Chimney Offload architecture will be the first development that segments the TCP/IP processing tasks between TOE engines and the operating system networking stack.
www.gridtoday.com /03/0512/101411.html   (520 words)

  
 PRESS RELEASE LeWiz Communications' TCP/IP Offload Engine Silicon Wows Critics   (Site not responding. Last check: 2007-10-20)
The LE2020 is a 4Gbps, two-port TOE engine, that allows both 1Gbps ports to run at full duplex, full line rate.
They do not offload the whole stack, and are not scalable -- requiring new architectures to move to the next generation.
LeWiz is the world's leading supplier of TCP Offload Engine (TOE) solutions that enable the highest performance and lowest power consumption in networked systems based on chip performance, not on hype.
www.marketwire.com /mw/release_html_b1?release_id=73999&category=   (398 words)

  
 Designing for Power - The Future of Moore's Law, Part 2   (Site not responding. Last check: 2007-10-20)
A good example is the TCP/IP (Transmission Control Protocol/Internet Protocol) Offload Engine (TOE) that we presented at ISSCC (International Solid-State Circuits Conference).
With the TOE, we demonstrated that you could handle a critical computing requirement of serving the network traffic with a very low-power processor.
Without this kind of special-purpose compute engine, you would have to employ roughly a 75-watt general-purpose engine, to do the same task — not a good idea in today's power conscious world.
www.intel.com /technology/computing/mi04031.htm   (1705 words)

  
 Web Hosting News - Speed Up Your Server with a TCP/IP Offload Engine   (Site not responding. Last check: 2007-10-20)
CPU processors are designed primarily for doing calculations and not for taking in and putting out data and as a result Ethernet network speeds have surpassed processor speeds which creates a bottleneck that keeps data from flowing through the network.
A TCP/IP offload engine is a chip that sits either on the network card or the host bus adaptor and expresses the TCP/IP stack.
With a price tag of nearly a thousand dollars the LeWiz TOE may not meet everyone’s needs but a TOE could well give a web hosting provider a jump on the competition in terms of high performance networking services.
www.hostsearch.com /news/lewiz_news_3195.asp   (370 words)

  
 The Linley Group
But near the end point of the network (typically in a corporate data center), the TCP connection must be “terminated” so that the server can process the data stream.
TCP termination involves rebuilding a data stream from many independent packets, some of which may arrive with errors or out of order; other packets may not arrive at all.
These boxes must have TCP capability; if they operate at gigabit speeds, a TOE is practically required, because standard CPUs and NPUs cannot perform TCP at that speed.
www.linleygroup.com /columns/nikkei1102.html   (785 words)

  
 Light Reading - Networking the Telecom Industry
Adaptec, which originally expected to start shipping its TCP/IP offload engine last spring, said on Wednesday that it demonstrated the technology with the new Microsoft TCP/IP offload architecture at WinHEC 2003, Microsoft's hardware developers conference.
Microsoft's Chimney Offload Architecture, according to Light, deals with this problem by segmenting TCP/IP processing tasks between TOE engines and the operating system networking stack.
Neither Adaptec and Broadcom would reveal how well they expect their chips to perform, but word has it that the Adaptec TOE, at least, which is the same one it's using in its recently shipped iSCSI adapter, is slower than what Alacritech has already been delivering for some time (see Adaptec Shipping iSCSI).
www.lightreading.com /document.asp?doc_id=33552&print=true   (835 words)

  
 News
Alacritech accelerators are well known as the highest-performing TCP offload and acceleration technology in the industry and are the only cards capable of moving both file- and block-level traffic.
To eliminate the network throughput, compatibility and scalability issues associated with other TCP/IP offload engines, Alacritech's data-path TCP/IP offload enables data movement to be performed by the custom ASIC on the adapter, and TCP/IP connection management and error handling to be handled by the host software.
SLIC Technology is the first fully compatible and scalable technology to offload network protocol processing, primarily TCP/IP, from software on the host system to silicon on the adapter.
www.applianceware.com /01202003/01202003.htm   (857 words)

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