WebNov 1, 1987 · We show how to efficiently implement the preconditioned conjugate gradient method on a four processors computer CRAY X-MP/48. We solve block tridiagonal … WebThis estimate is obtained from edge-diffraction theory or Fock theory. Hence, the method is called a hybrid-iterative method (HIM). The HIM is well-suited for use on a super …

Algorithm 698: DCUHRE

Web@article{osti_5593530, title = {Parallel implementation of multifrontal schemes}, author = {Duff, I S}, abstractNote = {We consider the direct solution of large sparse sets of linear equations in an MIMD environment. We base our algorithm on a multifrontal approach and show how to distribute tasks among processors according to an elimination tree that can … WebCRAY XMP-48 computer and used to simulate an experiment with a multi-chambered muffler of large bore volume, approximately nine gun volumes in size. The calculation continued for 16ms, at which time emptying of the muzzle was almost completed. An experiment was performed to compare with the numerical method and to give further ... nursing home in kountze tx

A parallel algorithm for sparse unsymmetric LU factorization

The top-end system was the X-MP/48, which contained four CPUs with a theoretical peak system performance of over 800 MFLOPS and 8 million words of memory. The CPUs in these models introduced vector gather/scatter memory reference instructions to the product line. See more The Cray X-MP was a supercomputer designed, built and sold by Cray Research. It was announced in 1982 as the "cleaned up" successor to the 1975 Cray-1, and was the world's fastest computer from 1983 to 1985 with a quad … See more Cray Research announced the X-MP Extended Architecture series in 1986. The EA series CPU had an 8.5 ns clock cycle (117 MHz), and was built from macrocell array and … See more A 1984 X-MP/48 cost about US$15 million plus the cost of disks. In 1985 Bell Labs purchased a Cray X-MP/24 for $10.5 million along with eight DD-49 1.2 GB drives for an additional $1 million. They received $1.5 million of trade-in credit for their Cray-1. See more • The short film The Adventures of André & Wally B., released in 1984 by The Graphics Group, a then-Lucasfilm subsidiary which … See more The X-MP's main improvement over the Cray-1 was that it was a shared-memory parallel vector processor, the first such computer from Cray Research. It housed up to four CPUs in … See more The Input/Output (I/O) subsystem could have two to four I/O processors with a total of 2 to 32 disk storage units. The DD-39 and DD-49 hard drives made by Ibis with a raw transfer rate of 13.3 MB/s each stored 1200 megabyte (blocked and formatted) with 5.9 MB/s and … See more The Cray-2, a completely new design, was introduced in 1985. A very different compact four-processor design with from 64 MW (megaword) to 512 MW (512 MB to 4 GB) of main memory, it was specified to 500 MFLOPS but was slower than the X-MP on certain … See more WebThe computational algorithm used for the migration is designed for a multi‐processor machine (Cray-XMP/48) and takes advantage of advanced disk technologies to overcome the input/output (I/O) problem. The method is demonstrated with both synthetic and field data. The migration of a typical 3-D data volume can be accomplished in only a few hours. WebJul 19, 2024 · The Cray Channels magazine provides some insight into the customer and applications that used Cray Research Supecomputers. The Corporate Register section often listed customer orders and installation of Cray systems around the world. These have been extracted and are presented here for review. njghw.com