Re: Attainable memory bandwidth

From: Daniel.Stodolsky@cs.cmu.edu
Date: Tue Oct 01 1991 - 08:24:12 CDT


This is for an
Omron Luna88k SX-9100/DT quad processor, 40 Mbytes of memory. The
compiler does not parallelize code.
Running Mach 2.5.

Danner

Script started on Tue Oct 1 09:19:31 1991
amalia[1] f77 -v -OLM stream_d.f
Green Hills Software, Inc. Fortran Compiler Version 1.8.5 November 1,
1990
/usr/lib/ccom/fcom88 -X85 -X71 stream_d.f stream_d.s -OLM
/bin/as stream_d.s -o stream_d.o
/bin/ld -X /usr/lib/crt0.o stream_d.o -lF77 -lI77 -lU77 -lm -ltermcap
-lindep -lc
rm stream_d.s stream_d.o
amalia[2] ./a.out
--------------------------------------
 Double precision appears to have 16 digits of accuracy
 Assuming 8 bytes per DOUBLEPRECISION word
--------------------------------------
  Timing calibration ; time = 149.99999329448 hundredths of a
second
  Increase the size of the arrays if this is <30
   and your clock precision is =<1/100 second
  ---------------------------------------------------
Function Rate (MB/s) RMS time Min time Max time
Assignment: 14.4000 0.3384 0.3333 0.3500
Scaling : 14.4000 0.3521 0.3333 0.4000
Summing : 16.0000 0.4567 0.4500 0.4667
SAXPYing : 13.0909 0.5551 0.5500 0.5667
amalia[3] f77 -v -OLM stream_s.f
Green Hills Software, Inc. Fortran Compiler Version 1.8.5 November 1,
1990
/usr/lib/ccom/fcom88 -X85 -X71 stream_s.f stream_s.s -OLM
/bin/as stream_s.s -o stream_s.o
/bin/ld -X /usr/lib/crt0.o stream_s.o -lF77 -lI77 -lU77 -lm -ltermcap
-lindep -lc
rm stream_s.s stream_s.o
amalia[4] ./a.out
--------------------------------------
 Single precision appears to have 7 digits of accuracy
 Assuming 4 bytes per default REAL word
--------------------------------------
  Timing calibration ; time = 121.667 hundredths of a second
  Increase the size of the arrays if this is <30
   and your clock precision is =<1/100 second
  ---------------------------------------------------
Function Rate (MB/s) RMS time Min time Max time
Assignment: 14.1177 0.2919 0.2833 0.3167
Scaling : 13.3334 0.3000 0.3000 0.3000
Summing : 15.6522 0.3901 0.3833 0.4000
SAXPYing : 13.3333 0.4601 0.4500 0.4667
amalia[5] exit
amalia[6]
script done on Tue Oct 1 09:20:58 1991



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