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CPU timing routines for a CONVEX C220 computer systemThe timing routines available on the CONVEX C220 computer system in the Structural Mechanics Division (SMD) at NASA Langley Research Center are examined. The function of the timing routines, the use of the timing routines in sequential, parallel, and vector code, and the interpretation of the results from the timing routines with respect to the CONVEX model of computing are described. The timing routines available on the SMD CONVEX fall into two groups. The first group includes standard timing routines generally available with UNIX 4.3 BSD operating systems, while the second group includes routines unique to the SMD CONVEX. The standard timing routines described in this report are /bin/csh time,/bin/time, etime, and ctime. The routines unique to the SMD CONVEX are getinfo, second, cputime, toc, and a parallel profiling package made up of palprof, palinit, and palsum.
Document ID
19900007108
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Bynum, Mary Ann
(PRC Kentron, Inc. Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1989
Subject Category
Computer Programming And Software
Report/Patent Number
NAS 1.26:181950
NASA-CR-181950
Accession Number
90N16424
Funding Number(s)
CONTRACT_GRANT: NAS1-18000
PROJECT: RTOP 505-63-01-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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