🚀 go-pugleaf

Hi Again...

   I was testing the on-chip RAM for a single Transputer:

   
   In Helios, i tried to accelerate a small test routine, using the
   fast on-chip Ram memory. The code is as follows:

   void cycle(int iterations) {

        int i;
	for(i=0; i<iterations; i++) {
	    /* nothing! */
	    }

   }

   In a normal situation, this takes 14 sec for 10,000,000 iterations.
   Using on-chip Ram, this takes 6 sec for      10,000,000 iterations.


   But in D7205 Occam 2 Toolset, if i try to do the same...

   VAL INT iterations IS 10000000:
   SEQ
     clock ? time1
     i := 0
     WHILE ( i < iterations )
       SEQ
         -- nothing!
	 i := i + 1
     clock ? time2


   In a normal situation, this takes 10 sec for 10,000,000 iterations.
   Using order.code := -1 in the .pgm this takes 14 sec for the same iterations.

   I suppose that this occurs because the occonf try to optimize by default
   the use of the on-chip RAM for small routines...

   But what about the best times? 6 sec in Helios and 10 sec in D7205 for the
   almost 'same' application... Furthermore, the occam process is the only
   process in the transputer...

   Why this difference?         Thanks in Advance...


                                                                       Maurro