public override void MaybePrefetchMemory(List <long> pagesToPrefetch)
{
if (PlatformDetails.CanPrefetch == false)
{
return; // not supported
}
if (pagesToPrefetch.Count == 0)
{
return;
}
var entries = new Win32MemoryMapNativeMethods.WIN32_MEMORY_RANGE_ENTRY[pagesToPrefetch.Count];
for (int i = 0; i < entries.Length; i++)
{
entries[i].NumberOfBytes = (IntPtr)(4 * Constants.Storage.PageSize);
entries[i].VirtualAddress = AcquirePagePointer(null, pagesToPrefetch[i]);
}
fixed(Win32MemoryMapNativeMethods.WIN32_MEMORY_RANGE_ENTRY *entriesPtr = entries)
{
Win32MemoryMapNativeMethods.PrefetchVirtualMemory(Win32Helper.CurrentProcess,
(UIntPtr)PagerState.AllocationInfos.Length, entriesPtr, 0);
}
}
public override void MaybePrefetchMemory(List <long> pagesToPrefetch)
{
if (CanPrefetch == false)
{
return; // not supported
}
if (pagesToPrefetch.Count == 0)
{
return;
}
var entries = new Win32MemoryMapNativeMethods.WIN32_MEMORY_RANGE_ENTRY[pagesToPrefetch.Count];
for (int i = 0; i < entries.Length; i++)
{
// We are prefetching 4 pages that with 4Kb pages is 32Kb but the idea is to really get a few consecutive pages to
// exploit locality regardless of the page size.
entries[i].NumberOfBytes = (IntPtr)(4 * PageSize);
entries[i].VirtualAddress = AcquirePagePointer(null, pagesToPrefetch[i]);
}
fixed(Win32MemoryMapNativeMethods.WIN32_MEMORY_RANGE_ENTRY *entriesPtr = entries)
{
Win32MemoryMapNativeMethods.PrefetchVirtualMemory(_currentProcess, (UIntPtr)PagerState.AllocationInfos.Length, entriesPtr, 0);
}
}
public override void MaybePrefetchMemory(List<long> pagesToPrefetch)
{
if (CanPrefetch == false)
return; // not supported
if (pagesToPrefetch.Count == 0)
return;
var entries = new Win32MemoryMapNativeMethods.WIN32_MEMORY_RANGE_ENTRY[pagesToPrefetch.Count];
for (int i = 0; i < entries.Length; i++)
{
entries[i].NumberOfBytes = (IntPtr)(4 * PageSize);
entries[i].VirtualAddress = AcquirePagePointer(null, pagesToPrefetch[i]);
}
fixed (Win32MemoryMapNativeMethods.WIN32_MEMORY_RANGE_ENTRY* entriesPtr = entries)
{
Win32MemoryMapNativeMethods.PrefetchVirtualMemory(Win32NativeMethods.GetCurrentProcess(), (UIntPtr)PagerState.AllocationInfos.Length, entriesPtr, 0);
}
}
