private static bool rdmsrWindows(uint index, out ulong value, ulong threadAffinityMask = 0)
{
value = 0;
if (driver == null)
{
return(false);
}
// Force current thread to run on the requested CPU core
// This probably works because the kernel processes short running requests on
// the CPU thread where they originated from to improve efficiency. While this
// is probably a likely hack, changing this behavior would require significant
// changes to the kernel driver.
ulong mask = 0xFFFFFFFFFFFFFFFF;
if (threadAffinityMask != 0)
{
mask = ThreadAffinity.Set(threadAffinityMask);
}
try {
// Communicate with WinRing0 driver
return(driver.DeviceIOControl(IOCTL_OLS_READ_MSR, index, ref value));
} finally {
if (threadAffinityMask != 0)
{
ThreadAffinity.Set(mask);
}
}
}
public static bool RdmsrTx(uint index, out uint eax, out uint edx, ulong threadAffinityMask)
{
ulong mask = ThreadAffinity.Set(threadAffinityMask);
bool result = Rdmsr(index, out eax, out edx);
ThreadAffinity.Set(mask);
return(result);
}
public static bool RdmsrTx(uint index, out uint eax, out uint edx,
GroupAffinity affinity)
{
var previousAffinity = ThreadAffinity.Set(affinity);
bool result = Rdmsr(index, out eax, out edx);
ThreadAffinity.Set(previousAffinity);
return(result);
}
public static bool CpuidTx(uint index, uint ecxValue, out uint eax, out uint ebx, out uint ecx, out uint edx, ulong threadAffinityMask)
{
ulong mask = ThreadAffinity.Set(threadAffinityMask);
if (mask == 0)
{
eax = ebx = ecx = edx = 0;
return(false);
}
Cpuid(index, ecxValue, out eax, out ebx, out ecx, out edx);
ThreadAffinity.Set(mask);
return(true);
}
public static bool CpuidTx(uint index, uint ecxValue,
out uint eax, out uint ebx, out uint ecx, out uint edx,
GroupAffinity affinity)
{
var previousAffinity = ThreadAffinity.Set(affinity);
if (previousAffinity == GroupAffinity.Undefined)
{
eax = ebx = ecx = edx = 0;
return(false);
}
Cpuid(index, ecxValue, out eax, out ebx, out ecx, out edx);
ThreadAffinity.Set(previousAffinity);
return(true);
}
public static ulong ThreadAffinitySet(ulong mask)
{
return(ThreadAffinity.Set(mask));
}