Path: utzoo!attcan!uunet!van-bc!ubc-cs!news-server.csri.toronto.edu!eecg.toronto.edu!leblanc
From: leblanc@eecg.toronto.edu (Marcel LeBlanc)
Newsgroups: comp.sys.amiga.tech
Subject: SAS/C 5.10 Dhrystone 2.1 results
Summary: 5.10 seems a little slower than 5.04
Message-ID: <1990Oct22.175350.13597@jarvis.csri.toronto.edu>
Date: 22 Oct 90 21:53:50 GMT
Lines: 50

After installing SAS/C 5.10 on my 2000, I was curious about any speed
improvements that might result from compiling programs with 5.10 vs. 5.04.
So I decided to compile Dhrystone 2.1 to test the integer/string performance
(that's all I'm really concerned about since my primary use for the 2000 is
software development).  Anyway, I found the results interesting, so here
they are for all to see:

To compile, I used:		lc -DTIME <options> ...

To link I used (c.o,$(OBJS),lcm.lib,lc.lib).

Here are the options, with dhrystone/sec results (100K loops unless
otherwise indicated):

	OPTIONS				   Lattice C 5.04    SAS/C 5.10

 (none)						 781.3		775.2
-cusrf						 781.3		781.3
-cusrf -O					 934.6		925.9
-cusrf -O -v					1000.5		983.6
					    (^^ 1e6 loops)   (^^ 1e7 loops)
-cusrf -O -v -DREG=register			1025.6		990.7
					    (^^ 1e6 loops)   (^^ 1e7 loops)
*NOTE: -v means no stack checking.

The 5.10 results are only slightly lower than 5.04, so I'm really not
concerned.  I was never able to get dhrystone to compile properly with
registerized parameters (-rr).  I created prototypes for all functions
(except Proc_1), but I always got the GURU.  Also, when linking with
lcmr.lib (5.10), blink could not find "_CXFERR".  No problem with lcm.lib.

One thing that disturbs me is the huge difference between these numbers and
those posted by Martin Hunt of Commodore-Amiga:

>                 2500/30   3000 (16 MHz)   3000 (25 Mhz)   2000
> 
> Normal          5950          4300            6050         600
> Registers       6110          4400            6225         620
> 68020           6600          4770            6800
> 68020/Reg       6820          4970            7000

600??? 620??? this is ridiculous!  He claims to have used "lc -v -O ...".
What gives?  Does this mean that the numbers for the A3000 are off too?
My A3000 is still on order, so I can't verify the claim of 7000 Dhrys/sec.

Comments or corrections?

Marcel A. LeBlanc  --  Electrical Eng. Computer Group, Univ. of Toronto
-----------------------------------------------------------------------
leblanc@eecg.toronto.edu		else: uunet!utcsri!eecg!leblanc