User guide

MS-DMT Guide v1.04
Released 05-30-2014
43
In Windows, if you have a dual core processor, it will look like there are two processors in
Windows, however there really is only one processor and TWO cores. So in a single dual core
system you’ll see CPU 0 and CPU 1. The first one is the physical process and the second one is
the virtual processor.
In a computer that has two dual core processors, you’ll see CPU 0, CPU 1, CPU 2, and CPU 3
where CPU 0 and CPU 1 are both the physical processors and CPU 2 and CPU 3 are the virtual
processors. Note that setting processor affinity is only useful for programs that actually support
hyper-threading.
If you try this on a non-hyper-threading process, it won’t make any difference and could actually
slow your computer down. An issue you might see on a dual core machine is slower running and
using up 100% of the CPU. You can go into the Processor Affinity dialog and un-check one of the
cores so that the program uses only a single core/
 It is recommended NOT TO change the Process Affinity for System Processes.
 The processor affinity setting lasts as long as an application is open, when you close the
application or restart the computer, the affinity returns to the default.