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mandelbrot

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R=rsc
DELTA=147  (145 added, 0 deleted, 2 changed)
OCL=32840
CL=32845
This commit is contained in:
Rob Pike 2009-08-06 14:21:21 -07:00
parent e2e6becf3a
commit c68398617b
5 changed files with 204 additions and 2 deletions
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91
test/bench/mandelbrot.c Normal file
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@ -0,0 +1,91 @@
/*
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of "The Computer Language Benchmarks Game" nor the
name of "The Computer Language Shootout Benchmarks" nor the names of
its contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
/* The Computer Language Shootout
http://shootout.alioth.debian.org/
contributed by Greg Buchholz
for the debian (AMD) machine...
compile flags: -O3 -ffast-math -march=athlon-xp -funroll-loops
for the gp4 (Intel) machine...
compile flags: -O3 -ffast-math -march=pentium4 -funroll-loops
*/
#include<stdio.h>
int main (int argc, char **argv)
{
int w, h, bit_num = 0;
char byte_acc = 0;
int i, iter = 50;
double x, y, limit = 2.0;
double Zr, Zi, Cr, Ci, Tr, Ti;
w = h = atoi(argv[1]);
printf("P4\n%d %d\n",w,h);
for(y=0;y<h;++y)
{
for(x=0;x<w;++x)
{
Zr = Zi = Tr = Ti = 0.0;
Cr = (2.0*x/w - 1.5); Ci=(2.0*y/h - 1.0);
for (i=0;i<iter && (Tr+Ti <= limit*limit);++i)
{
Zi = 2.0*Zr*Zi + Ci;
Zr = Tr - Ti + Cr;
Tr = Zr * Zr;
Ti = Zi * Zi;
}
byte_acc <<= 1;
if(Tr+Ti <= limit*limit) byte_acc |= 0x01;
++bit_num;
if(bit_num == 8)
{
putc(byte_acc,stdout);
byte_acc = 0;
bit_num = 0;
}
else if(x == w-1)
{
byte_acc <<= (8-w%8);
putc(byte_acc,stdout);
byte_acc = 0;
bit_num = 0;
}
}
}
}

95
test/bench/mandelbrot.go Normal file
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/*
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of "The Computer Language Benchmarks Game" nor the
name of "The Computer Language Shootout Benchmarks" nor the names of
its contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
/* The Computer Language Benchmarks Game
* http://shootout.alioth.debian.org/
*
* contributed by The Go Authors.
* Based on mandelbrot.c contributed by Greg Buchholz
*/
package main
import (
"bufio";
"flag";
"fmt";
"os";
)
var n = flag.Int("n", 200, "size")
func main() {
flag.Parse();
out := bufio.NewWriter(os.Stdout);
defer out.Flush();
w := *n;
h := *n;
bit_num := 0;
byte_acc := byte(0);
const Iter = 50;
const Zero float64 = 0;
const Limit = 2.0;
fmt.Fprintf(out, "P4\n%d %d\n", w, h);
for y := 0; y < h; y++ {
for x := 0; x<w; x++ {
Zr, Zi, Tr, Ti := Zero, Zero, Zero, Zero;
Cr := (2*float64(x)/float64(w) - 1.5);
Ci := (2*float64(y)/float64(h) - 1.0);
for i := 0; i < Iter && (Tr+Ti <= Limit*Limit); i++ {
Zi = 2*Zr*Zi + Ci;
Zr = Tr - Ti + Cr;
Tr = Zr * Zr;
Ti = Zi * Zi;
}
byte_acc <<= 1;
if Tr+Ti <= Limit*Limit {
byte_acc |= 0x01;
}
bit_num++;
if bit_num == 8 {
out.WriteByte(byte_acc);
byte_acc = 0;
bit_num = 0;
} else if x == w-1 {
byte_acc <<= uint(8-w%8);
out.WriteByte(byte_acc);
byte_acc = 0;
bit_num = 0;
}
}
}
}

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9
test/bench/timing.log
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@ -1,4 +1,4 @@
All tests on r45
All tests on r45 or r70
Aug 3 2009
@ -73,3 +73,10 @@ k-nucleotide 5000000
gcc -O2 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include k-nucleotide.c -lglib-2.0 k-nucleotide.c: 10.72u 0.01s 10.74r
gccgo -O2 k-nucleotide.go 22.69u 0.85s 24.09r
gc k-nucleotide 15.63u 0.26s 16.41r
gc_B k-nucleotide 17.22u 0.04s 17.28r
mandelbrot 5500
gcc -O2 mandelbrot.c 56.13u 0.02s 56.17r
gccgo -O2 mandelbrot.go 57.49u 0.01s 57.51r
gc mandelbrot 74.32u 0.00s 74.35r
gc_B mandelbrot 74.28u 0.01s 74.31r

11
test/bench/timing.sh
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@ -91,12 +91,21 @@ knucleotide() {
run 'gcc -O2 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include k-nucleotide.c -lglib-2.0' a.out <x
run 'gccgo -O2 k-nucleotide.go' a.out <x # warning: pages badly!
run 'gc k-nucleotide' $O.out <x
run 'gc_B k-nucleotide' $O.out <x
rm x
}
mandelbrot() {
echo 'mandelbrot 16000'
run 'gcc -O2 mandelbrot.c' a.out 16000
run 'gccgo -O2 mandelbrot.go' a.out -n 16000
run 'gc mandelbrot' $O.out -n 16000
run 'gc_B mandelbrot' $O.out -n 16000
}
case $# in
0)
run="fasta revcom nbody binarytree fannkuch regexdna spectralnorm knucleotide"
run="fasta revcom nbody binarytree fannkuch regexdna spectralnorm knucleotide mandelbrot"
;;
*)
run=$*