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- BBN_Butterfly abstract "The BBN Butterfly was a massively parallel computer built by Bolt, Beranek and Newman in the 1980s. It was named for the "butterfly" multi-stage switching network around which it was built. Each machine had up to 512 CPUs, each with local memory, which could be connected to allow every CPU access to every other CPU's memory, although with a substantially greater latency (roughly 15:1) than for its own. The CPUs were commodity microprocessors. The memory address space was shared.The first generation used Motorola 68000 processors, followed by a 68010 version.The Butterfly connect was developed specifically for this computer. The second or third generation, GP-1000 models used Motorola 68020's and scaled to 256 CPUs. The later, TC-2000 models (called "Monarchs") used Motorola MC88100's, and scaled to 512 CPUs.The Butterfly was initially developed as the VoiceFunnel, a router for the ST-II protocol intended for carrying voice and video over wideband networks. The Butterfly hardware was later used for the router of DARPA's high-speed descendant of ARPANET, the Satellite Wideband Network. This network later became the Terrestrial Wideband Network.[citation needed]The Butterfly began with a proprietary operating system called Chrysalis, but moved to a Mach kernel operating system in 1989. While the memory access time was non-uniform, the machine had SMP memory semantics, and could be operated as a symmetric multiprocessor.[citation needed]The largest configured system with over 123 processors (extras for fault-tolerant redundancy) was delivered to the MPCI facility at Lawrence Livermore National Laboratory. Most delivered systems had about 16 processors. No known configurations appear to be in museums. At least one system is thought to be sitting within a DARPA autonomous vehicle.[citation needed]TotalView, the parallel program debugger developed for the Butterfly, outlived the platform and was ported to a number of other massively parallel machines.".
- BBN_Butterfly wikiPageExternalLink BBN.html.
- BBN_Butterfly wikiPageID "1624181".
- BBN_Butterfly wikiPageRevisionID "573794394".
- BBN_Butterfly hasPhotoCollection BBN_Butterfly.
- BBN_Butterfly subject Category:Massively_parallel_computers.
- BBN_Butterfly subject Category:Supercomputers.
- BBN_Butterfly type Artifact100021939.
- BBN_Butterfly type Computer103082979.
- BBN_Butterfly type Device103183080.
- BBN_Butterfly type DigitalComputer103196324.
- BBN_Butterfly type Instrumentality103575240.
- BBN_Butterfly type Machine103699975.
- BBN_Butterfly type Mainframe103711711.
- BBN_Butterfly type MassivelyParallelComputers.
- BBN_Butterfly type Object100002684.
- BBN_Butterfly type PhysicalEntity100001930.
- BBN_Butterfly type Supercomputer104358117.
- BBN_Butterfly type Supercomputers.
- BBN_Butterfly type Whole100003553.
- BBN_Butterfly comment "The BBN Butterfly was a massively parallel computer built by Bolt, Beranek and Newman in the 1980s. It was named for the "butterfly" multi-stage switching network around which it was built. Each machine had up to 512 CPUs, each with local memory, which could be connected to allow every CPU access to every other CPU's memory, although with a substantially greater latency (roughly 15:1) than for its own. The CPUs were commodity microprocessors.".
- BBN_Butterfly label "BBN Butterfly".
- BBN_Butterfly label "BBN Butterfly".
- BBN_Butterfly label "BBN Butterfly".
- BBN_Butterfly sameAs BBN_Butterfly.
- BBN_Butterfly sameAs BBN_Butterfly.
- BBN_Butterfly sameAs m.05hk58.
- BBN_Butterfly sameAs Q3631728.
- BBN_Butterfly sameAs Q3631728.
- BBN_Butterfly sameAs BBN_Butterfly.
- BBN_Butterfly wasDerivedFrom BBN_Butterfly?oldid=573794394.
- BBN_Butterfly isPrimaryTopicOf BBN_Butterfly.