malloc.c A program to benchmark and test malloc.

tools/test/README

@@ -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().

tools/test/malloc/Makefile

@@ -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>

tools/test/malloc/malloc.c

@@ -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;
+}