private static SYSTEM_LOGICAL_PROCESSOR_INFORMATION[] ManagedGetLogicalProcessorInformation()
{
uint ReturnLength = 0;
GetLogicalProcessorInformation(IntPtr.Zero, ref ReturnLength);
if (Marshal.GetLastWin32Error() != ERROR_INSUFFICIENT_BUFFER)
{
return(null);
}
IntPtr Ptr = Marshal.AllocHGlobal((int)ReturnLength);
try
{
if (GetLogicalProcessorInformation(Ptr, ref ReturnLength))
{
int size = Marshal.SizeOf <SYSTEM_LOGICAL_PROCESSOR_INFORMATION>();
int len = (int)ReturnLength / size;
SYSTEM_LOGICAL_PROCESSOR_INFORMATION[] Buffer = new SYSTEM_LOGICAL_PROCESSOR_INFORMATION[len];
IntPtr Item = Ptr;
for (int i = 0; i < len; i++)
{
Buffer[i] = Marshal.PtrToStructure <SYSTEM_LOGICAL_PROCESSOR_INFORMATION>(Item);
Item += size;
}
return(Buffer);
}
}
finally
{
Marshal.FreeHGlobal(Ptr);
}
return(null);
}
public static SYSTEM_LOGICAL_PROCESSOR_INFORMATION[] GetLogicalProcessorInformationMarshal()
{
uint ReturnLength = 0;
GetLogicalProcessorInformation(IntPtr.Zero, ref ReturnLength);
if (Marshal.GetLastWin32Error() != ERROR_INSUFFICIENT_BUFFER)
{
throw new Exception("GetLogicalProcessorInformationがERROR_INSUFFICIENT_BUFFERを返さなかった");
}
IntPtr Ptr = Marshal.AllocHGlobal((int)ReturnLength);
try
{
if (GetLogicalProcessorInformation(Ptr, ref ReturnLength) == false)
{
throw new Exception("GetLogicalProcessorInformationに失敗");
}
int size = Marshal.SizeOf(typeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION));
int len = (int)ReturnLength / size;
SYSTEM_LOGICAL_PROCESSOR_INFORMATION[] Buffer = new SYSTEM_LOGICAL_PROCESSOR_INFORMATION[len];
IntPtr Item = Ptr;
for (int i = 0; i < len; i++)
{
Buffer[i] = (SYSTEM_LOGICAL_PROCESSOR_INFORMATION)Marshal.PtrToStructure(Item, typeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION));
Item += size;
}
return(Buffer);
}
finally
{
Marshal.FreeHGlobal(Ptr);
}
}
public static SYSTEM_LOGICAL_PROCESSOR_INFORMATION[] GetLogicalProcessorInformation()
{
uint ReturnLength = 0;
GetLogicalProcessorInformation(IntPtr.Zero, ref ReturnLength);
if (Marshal.GetLastWin32Error() == ERROR_INSUFFICIENT_BUFFER)
{
IntPtr Ptr = Marshal.AllocHGlobal((int)ReturnLength);
try
{
if (GetLogicalProcessorInformation(Ptr, ref ReturnLength))
{
int size = Marshal.SizeOf(typeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION));
int len = (int)ReturnLength / size;
var buffer = new SYSTEM_LOGICAL_PROCESSOR_INFORMATION[len];
IntPtr Item = Ptr;
for (int i = 0; i < len; i++)
{
buffer[i] = (SYSTEM_LOGICAL_PROCESSOR_INFORMATION)Marshal.PtrToStructure(Item, typeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION));
Item += size;
}
return(buffer);
}
}
finally
{
Marshal.FreeHGlobal(Ptr);
}
}
return(null);
}
private static SYSTEM_LOGICAL_PROCESSOR_INFORMATION[] ManagedGetLogicalProcessorInformation()
{
var ReturnLength = 0u;
GetLogicalProcessorInformation(IntPtr.Zero, ref ReturnLength);
if (Marshal.GetLastWin32Error() != ERROR_INSUFFICIENT_BUFFER)
{
return(null);
}
var pointer = Marshal.AllocHGlobal((int)ReturnLength);
try
{
if (GetLogicalProcessorInformation(pointer, ref ReturnLength))
{
var size = Marshal.SizeOf <SYSTEM_LOGICAL_PROCESSOR_INFORMATION>();
var length = (int)ReturnLength / size;
var buffer = new SYSTEM_LOGICAL_PROCESSOR_INFORMATION[length];
var itemPointer = pointer;
for (int i = 0; i < length; i++)
{
buffer[i] = Marshal.PtrToStructure <SYSTEM_LOGICAL_PROCESSOR_INFORMATION>(itemPointer);
itemPointer += size;
}
return(buffer);
}
}
finally
{
Marshal.FreeHGlobal(pointer);
}
return(null);
}
public static int GetNumaNodes()
{
int numaNodes = 0;
uint returnLength = 0;
GetLogicalProcessorInformation(IntPtr.Zero, ref returnLength);
IntPtr Ptr = Marshal.AllocHGlobal((int)returnLength);
try
{
if (GetLogicalProcessorInformation(Ptr, ref returnLength))
{
int size = Marshal.SizeOf(typeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION));
int len = (int)returnLength / size;
IntPtr item = Ptr;
for (int i = 0; i < len; i++)
{
SYSTEM_LOGICAL_PROCESSOR_INFORMATION record =
(SYSTEM_LOGICAL_PROCESSOR_INFORMATION)Marshal.PtrToStructure(
item,
typeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION));
if (record.Relationship == LOGICAL_PROCESSOR_RELATIONSHIP.RelationNumaNode)
{
numaNodes += 1;
}
item += size;
}
return(numaNodes);
}
}
catch (Exception ex)
{
Debug.WriteLine("Failed to find NUMA nodes: " + ex);
}
finally
{
Marshal.FreeHGlobal(Ptr);
}
return(0);
}
