jonasn@ttds.UUCP (Jonas Nygren) (06/06/89)
I have just compiled sicstus prolog on the DECstation3100 and ran into a
strange beahviour. When compiling the wam-engine, which is implemented as
one 800 lines long procedure, 'cc' complained and asked me to define an
-Olimit 0f at least 2772. I declared it 3000 and tried to recompile to get
an optimized version of the wam but had no luck. My machine only has the
minimum 8 Mbytes so I tried to run this compilation in single user mode.
Here follows the result of two seperate 'ps -axv' which I did to document
the situation:
PID TT STAT TIME SL RE PAGEIN SIZE RSS LIM TSIZ TRS %CPU %MEM COMMAND
1786 co P 1:06 0 4 19014 6756 388 xx 408 12 0.0 6.9 uopt1.31
1793 co R 0:00 0 2 7 296 256 xx 104 88 29.9 6.0 ps
1 ? IW 0:01 99 99 552 260 0 5904 68 0 0.0 0.0 init
1773 co S 0:00 2 4 356 84 60 xx 152 108 0.0 3.0 csh
1754 co IW 0:00 99 99 93 16 0 5904 36 0 0.0 0.0 sh
2 ? D 0:18 4 99 0 1632 0 5904 0 0 0.0 0.1 pagedaemon
1782 co IW 0:00 99 99 7 36 0 xx 68 0 0.0 0.0 cc1.31
0 ? D 0:12 4 99 0 0 0 5904 0 0 0.0 0.1 swapper
PID TT STAT TIME SL RE PAGEIN SIZE RSS LIM TSIZ TRS %CPU %MEM COMMAND
1786 co P 3:27 0 3 91115 7396 368 xx 408 4 0.0 6.4 uopt1.31
1797 co R 0:00 0 2 7 296 256 xx 104 88 8.5 6.0 ps
1 ? IW 0:01 99 99 552 260 0 5904 68 0 0.0 0.0 init
1773 co S 0:01 1 3 470 84 60 xx 152 100 0.0 2.8 csh
1754 co IW 0:00 99 99 93 16 0 5904 36 0 0.0 0.0 sh
2 ? D 0:23 3 99 0 1632 0 5904 0 0 0.0 0.1 pagedaemon
1782 co IW 0:00 99 99 7 36 0 xx 68 0 0.0 0.0 cc1.31
0 ? D 0:12 3 99 0 0 0 5904 0 0 0.0 0.1 swapper
As you can see there is an awful lot of PAGEIN's done but also a lot of
real physical memory available. 'uopt1.31' only use 6.4% of the memory
and other processes are only using a total of 9%. WHY don't uopt use
some of the 80+% mem available? What can I be doing wrong? Is there any
parameter I could tune to get a different beahviour?
I really would like the PMAX to show off well in any prolog benchmarks
so I hope somebody out there have any tips on how to allow uopt to use more
memory so that I can get an optimized version of the wam procedure which
is the heart of sicstus prolog.
Thanx in advance