NESC9678 CRI.

CRI, 4-Processor VAX-11/780 Simulation of CRAY Multitasking System

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: CRI.

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2. COMPUTERS

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Program name	Package id	Status	Status date
CRI	NESC9678/01	Tested	21-OCT-1988

Machines used:

Package ID	Orig. computer	Test computer
NESC9678/01	DEC VAX 11/780	DEC VAX 8810

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3. DESCRIPTION OF PROGRAM OR FUNCTION

CRI is a subroutine library and set of utilities which allow the use of a four-processor shared memory DEC VAX11/780-4 computer for parallel processing in a manner compatible with the present use of Cray Research, Inc.'s (CRI's) multitasking primitives on Cray computers. Included in the library are subroutines to perform resource initialization, task functions, lock operations, event signals, file sharing, and work queueing synchronization.

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4. METHOD OF SOLUTION

A task consists of code and data that can be scheduled for execution on a CPU. Locks are the facility for monitoring critical regions of code. Events allow signaling between tasks; they have two states: cleared and posted. Posting an event allows all other tasks waiting on that event to resume execution. The CRI utilities consist of command procedures for creating the files needed to use the shared memory; for compiling and liking a multitasking program; for starting the logical processors on the physical processors after the time specified by submitting the job(s) to the selected generic batch queue and, optionally, interactively relinquishing control to the multiprocessor debugger; and for removing jobs from the batch queue and, optionally, unmapping specified global sections from shared memory. CRIDEBUG utility does not work properly in this release.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

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6. TYPICAL RUNNING TIME:

NESC9678/01

The routines of this code were only compiled at NEA-DB on a VAX 8810 computer using VAX FORTRAN 77 V5.-01 compiler and MACRO-11 assembler.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS:

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9. STATUS

Package ID	Status date	Status
NESC9678/01	21-OCT-1988	Screened

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10. REFERENCES:

NESC9678/01, included references:

- N.E. Werner and S.W.Van Martre :
  Parallel Processing on the Livermore VAX 11/780-4 Parallel
  Processor System with Compatibility to Cray Research, Inc. (CRI)
  Multitasking, Version 1
  UCRL-92624, Preprint (May 1985)

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11. MACHINE REQUIREMENTS:

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NESC9678/01	FORTRAN-77 + MACRO-11

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: VMS.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

The CRIDEBUG utility does not work properly in this release.

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15. NAME AND ESTABLISHMENT OF AUTHORS

          N.E. Werner and S.W. Van Matre
          Lawrence Livermore National Laboratory
          P.O. Box 808
          Livermore, California 94550

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16. MATERIAL AVAILABLE

NESC9678/01

File name	File description	Records
NESC9678_01.001	INFORMATION FILE	91
NESC9678_01.002	AREADME INFO FILE	76
NESC9678_01.003	COMMAND PROCEDURES	2444
NESC9678_01.004	VAX FORTRAN-77 ROUTINES	1753
NESC9678_01.005	CRI_EVENTS ROUTINE MACRO-11	417
NESC9678_01.006	CRI_LOCKS ROUTINE MACRO-11	351
NESC9678_01.007	CRI_SEMAS ROUTINE MACRO-11	529
NESC9678_01.008	CRI_TASK ROUTINE MACRO-11	302
NESC9678_01.009	OPEN_FILE ROUTINE PASCAL	58
NESC9678_01.010	CRI_ERRORS ROUTINE	139

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17. CATEGORIES

P. General Mathematical and Computing System Routines

Keywords: dec computers, utility routines.