private static unsafe void LoadCpuMaskFromGroupAffinities(ProcessorRelationship *p,
ref BitMask cpuMask)
{
for (int i = 0; i < p->GroupCount; ++i)
{
GroupAffinity *g = ProcessorRelationship.GetGroup(p, i);
int groupIndex = g->Group;
if (Environment.Is64BitProcess)
cpuMask.SetWord64(groupIndex, (ulong)g->Mask); }
/// <summary>
/// Count how many physical cores in total are present.
/// </summary>
/// <param name="infoArray">CPU topology info from <see cref="GetList"/>. </param>
public static int CountNumberOfCores(CpuTopologyInfo[] infoArray)
{
// Prevent stack overflow
if (infoArray.Length > short.MaxValue)
{
throw new ArgumentOutOfRangeException(nameof(infoArray));
}
var cores = new BitMask(stackalloc ulong[BitMask.GetNumberOfNativeWords(infoArray.Length)]);
foreach (var item in infoArray)
{
cores[item.CoreId] = true;
}
return(cores.CountOnBits());
}