Nehalem

Intel x86-64 PMU (Nehalem)

The x86-64 PMUs are specific to each underlying architecture. The Netburst architecture of the Pentium-4 has given way to the Core architecture, in use in Nehalem, i7 processors.

The recent PMUs seem to be somewhat structured similarly across Core and Atom CPU models.

PMU overview

The diagram of PMU registers shows the registers available depending on which processor family you are using. You are offered at least 4 counters.