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Conference turris::decc

Title:	DECC
Notice:	General DEC C discussions
Moderator:	TLE::D_SMITHNTE

Created:	Fri Nov 13 1992
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	2212
Total number of notes:	11045

2173.0. "C compiles 2X as long under VMS7.1" by CSC32::F_PUZ (Dave Brown CSC-VSG/INTDRV) Thu May 01 1997 19:25

    
    Problem                                                                         
    
            Customer has upgraded VMS 6.2 to 7.1 on an alpha 7650                   
            with 1 gig of memory.  He has discovered that his                       
            C (version 5.5) compiles take 10 hours longer than                      
            they did before, from 18 hours to 28 hours.  Through use                
            of Monitor the user has detected lots of demand-zero                    
            page faulting.  He has tried to increase relevent                       
            working set quotas but the process never appears to                     
            claim a larger working set.                                             
    
    
    Appreciate thoughts, direction ideas.

T.R	Title	User	Personal Name	Date	Lines
2173.1	where did you get that username?	CUJO::SAMPSON		`Thu May 01 1997 23:22`	1
	Dunno, Dave, but F_PUZ sure is a wild username...
2173.2	suggested approach	CAIRN::HARRIS	Kevin Harris, dtn 381-2039	`Fri May 02 1997 09:30`	8
	Dave, If the compiler image didn't change, nor did the machine itself, then the culprit could only be the system configuration, I would particularly suspect the memory parameters. Did the customer keep a backup of his old system, to compare system parameters with the new one? I suspect that attacking it as a straightforward system tuning problem, using the available OVMS manuals, should work well in this case. -Kevin