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malloc.c A program to benchmark and test malloc.

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Poul-Henning Kamp 1995-10-15 12:29:12 +00:00
parent ec6708b450
commit 953a3198a3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=11498
3 changed files with 68 additions and 0 deletions
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2
tools/test/README
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@ -4,3 +4,5 @@ A test program is one that will excercise a particular bit of the system
and try to break it and/or measuring performance on it.
Please make a subdir per program, and add a brief description to this file.
malloc A program to test and benchmark malloc().

23
tools/test/malloc/Makefile Normal file
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@ -0,0 +1,23 @@
PROG= malloc
NOMAN= sorry
libcmalloc:
make clean
make "CFLAGS=-O2"
mv malloc libcmalloc
@echo
@csh -x -c "time ./libcmalloc 500000 2000 8192"
@csh -x -c "time ./libcmalloc 50000000 2000 8192"
@csh -x -c "time ./libcmalloc 500000 14000 8192"
@csh -x -c "time ./libcmalloc 20000000 20000 2048"
gnumalloc:
make clean
make "CFLAGS=-lgnumalloc -O2"
mv malloc gnumalloc
@csh -x -c "time ./gnumalloc 500000 2000 8192"
@csh -x -c "time ./gnumalloc 50000000 2000 8192"
@csh -x -c "time ./gnumalloc 500000 14000 8192"
@csh -x -c "time ./gnumalloc 20000000 20000 2048"
.include <bsd.prog.mk>

43
tools/test/malloc/malloc.c Normal file
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@ -0,0 +1,43 @@
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
u_long NBUCKETS = 2000;
u_long NOPS = 200000;
u_long NSIZE = (16*1024);
char **foo;
int
main(int argc, char **argv)
{
int i,j,k;
if (argc > 1) NOPS = strtoul(argv[1],0,0);
if (argc > 2) NBUCKETS = strtoul(argv[2],0,0);
if (argc > 3) NSIZE = strtoul(argv[3],0,0);
printf("BRK(0)=%x ",sbrk(0));
foo = malloc (sizeof *foo * NBUCKETS);
memset(foo,0,sizeof *foo * NBUCKETS);
for (i = 0 ; i < NOPS ; i++) {
j = rand() % NBUCKETS;
if (foo[j]) {
free(foo[j]);
foo[j] = 0;
} else {
k = rand() % NSIZE;
foo[j] = malloc(k);
foo[j][0] = 1;
}
}
printf("BRK(1)=%x ",sbrk(0));
for (j = 0 ; j < NBUCKETS ; j++) {
if (foo[j]) {
free(foo[j]);
foo[j] = 0;
}
}
printf("BRK(2)=%x NOPS=%lu NBUCKETS=%lu NSIZE=%lu\n",
sbrk(0),NOPS,NBUCKETS,NSIZE);
return 0;
}