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J–Machine
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><h2 id="history">History</h2> <p>The J-machine project was started in 1988 based on work in <a href="/facts/Bill_Dally/aIGwzskJ">Bill Dally</a>'s <a href="/facts/Doctor_of_Philosophy/paJumdN8">doctoral</a> work at <a href="/facts/Caltech/3FPcp7BL">Caltech</a>.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> </p><p>The philosophy of the work was "processors are cheap and memory is expensive," the <i>J</i> in the project's title standing for <a href="/facts/Jellybean/ncFmgtbm">jellybean</a> which are small cheap candies. In order to make use of large numbers of processors, the machine featured a novel network interface using <a href="/facts/Message_passing/RYf3hD3J">message passing</a>.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> This allowed a node to send a message to any other node within 2 <a href="/facts/Microseconds/zdW1DEb2">microseconds</a>.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> </p><p>Three 1024-node J-machine systems have been built and are kept at <a href="/facts/MIT/Xk49vNA8">MIT</a>, <a href="/facts/Caltech/3FPcp7BL">Caltech</a> and <a href="/facts/Argonne_National_Laboratory/EAoR1Rnm">Argonne National Laboratory</a>.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> </p> <h2 id="external-links">External links</h2> <ul><li><a href="http://cva.stanford.edu/projects/j-machine/">The Jellybean Machine</a></li></ul> <h2 id="notes">Notes</h2> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Dally, William; Chang, Andrew; Chien, Andrew; Fiske, Stuart; Horwat, Waldemar; Keen, John; Lethin, Richard; Noakes, Michael; Nuth, Peter (1998). "The J-Machine: A Retrospective" (PDF). Retrieved 2009-06-17. <a href="/wiki/Bill_Dally" target="_blank">/wiki/Bill_Dally</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"J-Machine Project Page". web.mit.edu. Retrieved 2022-12-30. <a href="http://web.mit.edu/sctv/OldFiles/old_sites/20030413045411/http://cva.stanford.edu/j-machine/cva_j_machine.html" target="_blank">http://web.mit.edu/sctv/OldFiles/old_sites/20030413045411/http://cva.stanford.edu/j-machine/cva_j_machine.html</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Dally, William J.; Towles, Brian (2004). Principles and practices of interconnection networks. Morgan Kaufmann. pp. 102–109. ISBN 0-12-200751-4. <a href="0-12-200751-4" target="_blank">0-12-200751-4</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Hord, R. Michael (1993). "12. The J-Machine: A fine-grain concurrent computer". Parallel supercomputing in MIMD architectures. CRC Press. pp. 225–236. ISBN 0-8493-4417-4. <a href="0-8493-4417-4" target="_blank">0-8493-4417-4</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"The Jellybean Machine". CVA Group, Stanford University. Retrieved 2009-06-17. <a href="http://cva.stanford.edu/projects/j-machine/" target="_blank">http://cva.stanford.edu/projects/j-machine/</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> </ol>