private static void GatherCommonPerCoreInformation()
{
if (RuntimeInformation.ProcessArchitecture != Architecture.X86 &&
RuntimeInformation.ProcessArchitecture != Architecture.X64)
{
return;
}
for (var i = 0; i < information.Cpu.LogicalCores; i++)
{
var core = information.Cpu.Cores.First(c => c.Number == i);
var thread = Util.RunAffinity(1uL << i, () =>
{
if (information.Cpu.MaxCpuIdFeatureLevel >= 16)
{
Opcode.Cpuid(out var result, 0x16, 0);
core.ReferenceNormalClockSpeed = result.eax;
core.ReferenceMaxClockSpeed = result.ebx;
core.ReferenceBusSpeed = result.ecx;
}
});
// TODO: Tests
private static void GetCoreSpeeds()
{
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.High;
for (var i = 0; i < information.Cpu.LogicalCores; i++)
{
if (i > 64)
{
// Too long for long
break;
}
var core = information.Cpu.Cores.First(c => c.Number == i);
core.NormalClockSpeed = information.Cpu.NormalClockSpeed;
using var ct = new CancellationTokenSource();
PerformanceCounter counter = null;
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
counter =
new PerformanceCounter("Processor Information", "% Processor Performance", "0," + i);
counter.NextValue();
}
var thread = Util.RunAffinity(1uL << i, () =>
{
var g = 0;
while (!ct.IsCancellationRequested)
{
g++;
}
});
Thread.Sleep(1000);
var value = core.NormalClockSpeed;
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
value = (uint)(counter.NextValue() / 100.0f * value);
counter.Dispose();
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
try
{
// KHz
var freq = ulong.Parse(
File.ReadAllText($"/sys/devices/system/cpu/cpu{i}/cpufreq/scaling_cur_freq"));
value = (uint)(freq / 1000);
}
catch (Exception)
{
// Abort early since failing once means we'll most likely fail always.
ct.Cancel();
break;
}
}
core.MaxClockSpeed = value;
ct.Cancel();
thread.Wait();
}
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.Normal;
information.Cpu.MaxClockSpeed =
information.Cpu.Cores.Count > 0 ? information.Cpu.Cores.Max(c => c.MaxClockSpeed) : 0;
}