public void Alloc(byte order)
{
var size = (1u << order) * 4096;
fixed(mem_zone *zone = &global_mem_block.zone)
{
var data = new byte[size];
rnd.NextBytes(data);
var ptr = (byte *)Allo.page_to_virt(zone, Allo.buddy_get_pages(zone, order));
if (ptr == null)
{
var s = "";
}
for (var i = 0; i < size; i++)
{
ptr[i] = data[i];
}
hash.Add((UIntPtr)ptr, new AllocEnry {
Data = data
});
//ptr[10] = 0;
Check();
}
}
public void run()
{
uint pages_size;
uint start_addr;
const uint _NPAGES = 8192;
// init global memory block
// all pages area
pages_size = _NPAGES * (uint)sizeof(page);
global_mem_block.pages = (page *)Marshal.AllocHGlobal((int)pages_size);
start_addr = (uint)Marshal.AllocHGlobal((int)(_NPAGES * Allo.BUDDY_PAGE_SIZE));
global_mem_block.zone.free_area = (Allo.free_area *)Marshal.AllocHGlobal(Allo.BUDDY_MAX_ORDER * (int)sizeof(Allo.free_area));
fixed(mem_zone *zone = &global_mem_block.zone)
{
Allo.buddy_system_init(zone,
global_mem_block.pages,
start_addr,
_NPAGES);
}
for (var i = 0; i < 10000; i++)
{
if (hash.Count > 3 && rnd.Next(2) == 0)
{
RandomFree();
}
else
{
var order = (byte)((uint)rnd.Next(4) + 1);
Alloc(order);
}
}
System.Console.WriteLine(hash.Count);
}
private void RandomFree()
{
fixed(mem_zone *zone = &global_mem_block.zone)
{
var keys = hash.Keys.ToList();
var ptr = keys[rnd.Next(keys.Count - 1)];
hash.Remove(ptr);
var page = Allo.virt_to_page(zone, (void *)ptr);
Allo.buddy_free_pages(zone, page);
}
}