국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	The Characteristic parameters of the NWT computer system in the global memory access.
저자	Shigeki HATAYAMA
Keyword	communication performance; message bandwidth; latency; parallel processing; global memory access; MIMD computing; synchronization overhead; communication overhead; maximum performance; half-performance grain size; half-performance intensity; NWT
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr0001362t.pdf?id=NALTR0001362T
보고서번호	NAL TR-1362T
발행년도	1998.10
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	The NWT computer system available at the NAL since February 1993 comprises two system administrators, n processing elements (where n was 140 at the beginning, and is 166 at present) and a crossbar network, and operates as a distributed-memory message-passing MIMD computer. Each processing element itself is a vector computer. This paper reports measurements of two pairs of the characteristic parameters, (r∞, n1/2) and (r＾∞, s＾1/2, f1/2), of the NWT with the communication performance between the global and local memory spaces through the medium of the crossbar network and with MIMD computing in the global memory access, respectively. The significance of the results is interpreted, and several hardware parameters are estimated. The results in this paper apply only to the NWT system software during the period April to June 1993.