{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,20]],"date-time":"2025-02-20T05:17:48Z","timestamp":1740028668787,"version":"3.37.3"},"reference-count":0,"publisher":"IOS Press","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2018]]},"abstract":"<jats:p>The supercomputers listed in Top500 and running the HPCG benchmark are usually not able to use more than 1&amp;ndash;5 % of their peak computing power, and no system is able to achieve 1 PFlop\/s. The paper shows that the Conjugate Gradient algorithm without preconditioning requires only weak bandwidth of interconnect links, but, being a problem of low arithmetic intensity (flop\/byte ratio), it would need the memory bandwidth about 20 times greater than available.<\/jats:p>","DOI":"10.3233\/978-1-61499-843-3-211","type":"book-chapter","created":{"date-parts":[[2025,2,19]],"date-time":"2025-02-19T15:30:51Z","timestamp":1739979051000},"source":"Crossref","is-referenced-by-count":0,"title":["On Architecture for the Future Petascale Computing"],"prefix":"10.3233","author":[{"family":"Ku&ccaron;era Lud&ecaron;k","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"7437","container-title":["Advances in Parallel Computing","Parallel Computing is Everywhere"],"original-title":[],"deposited":{"date-parts":[[2025,2,19]],"date-time":"2025-02-19T15:40:29Z","timestamp":1739979629000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.medra.org\/servlet\/aliasResolver?alias=iospressISBN&isbn=978-1-61499-842-6&spage=211&doi=10.3233\/978-1-61499-843-3-211"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018]]},"references-count":0,"URL":"https:\/\/doi.org\/10.3233\/978-1-61499-843-3-211","relation":{},"ISSN":["0927-5452"],"issn-type":[{"value":"0927-5452","type":"print"}],"subject":[],"published":{"date-parts":[[2018]]}}}