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#include "Rts.h"
#include "RtsFlags.h"
#ifdef DEBUG
#define INLINE_HEADER
#endif
#include "MBlock.h"
#ifdef DEBUG
extern void *getFirstMBlock(void);
extern void *getNextMBlock(void *mblock);
#endif
#include <stdio.h>
#include <string.h>
extern bdescr *allocGroup_lock_lock(nat n);
extern void freeGroup_lock(bdescr *p);
const int ARRSIZE = 2000;
const int LOOPS = 20000;
const int MAXALLOC = ((8 * 1024 * 1024) / BLOCK_SIZE - 1);
//const int MAXALLOC = ((4 * 1024 * 1024) / BLOCK_SIZE - 1);
const int SEED = 0xf00f00;
extern StgWord mblocks_allocated;
int main (int argc, char *argv[])
{
int i, j, b;
bdescr *a[ARRSIZE];
srand(SEED);
hs_init(&argc, &argv);
memset(a, 0, ARRSIZE * sizeof(bdescr*));
for (i=0; i < LOOPS; i++)
{
j = rand() % ARRSIZE;
if (a[j]) { freeGroup_lock(a[j]); }
a[j] = allocGroup_lock(rand() % MAXALLOC + 1);
}
#ifdef DEBUG
{
void *p;
i = 0;
for (p = getFirstMBlock(); p != NULL; p = getNextMBlock(p))
{
if (!HEAP_ALLOCED(p)) barf("%p",p);
i++;
}
printf("%d\n", i);
}
#endif
{
void *p, *base;
j = 0;
base = RtsFlags.GcFlags.heapBase;
for (i=0; i < LOOPS*2000; i++)
{
// this is for testing: generate random addresses anywhere
// in the address space.
//
// 48 bits is: 0x800000000000 - 0x7fffffffffff
// so ((StgInt)rand() >> 4) varies between -2^27 and 2^27-1.
// and << 20 of this is a random signed 48-bit megablock address
//
// p = (void*)((StgWord)((StgInt)rand() >> 4) << 20);
// this is for benchmarking: roughly half of these
// addresses will be in the heap.
p = base + (((StgWord)rand() << 10) %
((StgWord)ARRSIZE * MAXALLOC * BLOCK_SIZE));
if (HEAP_ALLOCED(p)) {
// printf("%p\n",p);
j++;
}
}
printf("%d\n", j);
}
printf("misses: %ld, %ld%%\n", mpc_misses, mpc_misses / (LOOPS*20));
for (i=0; i < ARRSIZE; i++)
{
if (a[i]) { freeGroup_lock(a[i]); }
}
hs_exit(); // will do a memory leak test
exit(0);
}
// 48 bits is: 0x800000000000 - 0x7fffffffffff
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