Does anyone know if the new Whiskey Lake CPU from Intel supports the PTWRITE instruction for the Intel PT tracing feature? If you happen to be running Linux on one of these processors, you can easily check with this command:

Code:

cat /sys/bus/event_source/devices/intel_pt/caps/ptwrite

If it says "0", there's no support for PTWRITE, but if it says "1" then please let me know! So far the only released CPU models with this feature are based on Atom and there just isn't enough bandwidth to really use it. I need in i9 or Xeon with this feature for my research, but haven't found the motivation to actually buy a Whiskey Lake just to check for this. Note that everything published about this feature is ambiguous and often incorrect (e.g., Kaby Lake does not enable PTWRITE, despite reports on wikichip and other places that are normally reliable).