[prev in list] [next in list] [prev in thread] [next in thread]
List: kde-solaris
Subject: [kde-solaris] Re: fibonacci
From: Stefan Teleman <steleman () nyc ! rr ! com>
Date: 2004-11-06 0:53:17
Message-ID: 200411051953.17931.steleman () nyc ! rr ! com
[Download RAW message or body]
On Friday 05 November 2004 08:07, Eva Brucherseifer wrote:
> ... which doesn't really give a good number ;-)
> CPU architectures and compilers give very different time results,
> if it comes to integer vs. float calculation. KDE is a gui and thus
> you mainly have integer calculation - here calculating PI certainly
> isn't a good benchmark. And don't ask me for a proposal an how to
> measure speed on KDE...
>
> Greetings,
> eva
------
:-)
No doubles, no floating point:
/* fibonacci.c */
#include <stdio.h>
#include <math.h>
#include <time.h>
static const unsigned int iterations = 10;
unsigned int fibonacci (unsigned int n)
{
return ((n < 2) ? 1 : fibonacci(n-1) + fibonacci(n-2));
}
int
main (int argc, char* argv[])
{
int i = 0;
unsigned int j = 0;
unsigned int result;
clock_t start;
clock_t end;
double elapsed;
if (argc != 2)
{
(void) fprintf (stderr, "Usage: %s <fibonacci>\n",
argv[0]);
return (-1);
}
i = atoi(argv[1]);
start = clock();
for (j = 0; j < iterations; j++)
{
result = fibonacci((unsigned int) i);
}
end = clock();
elapsed = ((double) (end / CLOCKS_PER_SEC) - (double) (start /
CLOCKS_PER_SEC));
(void) fprintf (stderr, "%s: calculated %u fibonacci(%ld) in
%lf seconds\n", argv[0], iterations, i, elapsed);
return (0);
}
/* fibonacci.c */
Downloaded from sunfreeware: GCC 3.4.2
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:46:08][178]>>
/usr/local/bin/gcc --version
gcc (GCC) 3.4.2
Copyright (C) 2004 Free Software Foundation, Inc.
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There
is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:46:08][179]>>
[ ... figure out gcc 3.4.2's flags ... ]
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:49:41][182]>>
/usr/local/bin/gcc -m32 -mv8plus -O3 fibonacci.c -o fibonacci.gcc342
-lc -lm
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:49:51][183]>>
./fibonacci.gcc342 36
./fibonacci.gcc342: calculated 10 fibonacci(36) in 17.000000 seconds
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:50:48][184]>>
source .cflags
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:51:23][185]>>
echo $CC
/opt/Forte-9.0/SUNWspro/prod/bin/cc
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:51:36][186]>>
echo $CFLAGS
-erroff=%all -errshort=full -errfmt=error -errwarn=%none -xO4 -s
-xc99=%all,no%lib -xjobs=2 -xtarget=ultra2 -dalign -xprefetch=auto
-xprefetch_level=3 -xbuiltin=%all -xregs=appl,no%float
-xcache=32/64/4:2048/64/1 -xcsi -xcode=pic32 -xinline=%auto
-xustr=ascii_utf16_ushort -xvis=yes -z now -z rescan -z absexec
-xildoff -xldscope=symbolic -xpagesize=default -xF=%all
-xalias_level=std -xmemalign=8i -xsafe=mem -xthreadvar -lpthread
-lposix4 -lrt -mt -D_REENTRANT -D__EXTENSIONS__ -D_XPG4_2 -DSOLARIS
-DSOLARIS9 -DUSE_SOLARIS -DNDEBUG -KPIC -xarch=v8plusa
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:51:38][187]>>
$CC $CFLAGS fibonacci.c -o fibonacci.forte9 -lc -lm
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:53:11][188]>>
> ./fibonacci.forte9 36
./fibonacci.forte9: calculated 10 fibonacci(36) in 9.000000 seconds
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:53:51][189]>>
uname -a
SunOS obiwan 5.9 Generic_117171-05 sun4u sparc SUNW,Ultra-60
[steleman@obiwan][~/programming/fibonacci][11/05/2004 19:59:28][190]>>
--Stefan
--
Stefan Teleman 'Nobody Expects the Spanish Inquisition'
steleman@nyc.rr.com -Monty Python
___________________________________________________
This message is from the kde-solaris mailing list.
Account management: https://mail.kde.org/mailman/listinfo/kde-solaris.
Archives: http://lists.kde.org/.
More info: http://www.kde.org/faq.html.
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic