This is a list of ia64 Itanium core CPU's performance counter event types. Please see the Intel Architecture Itanium Family Reference Manual Chapter 10.
| Name | Description | Counters usable | Unit mask options |
| CPU_CYCLES | CPU Cycles | all | |
| IA64_INST_RETIRED | IA-64 Instructions Retired | 0, 1 | |
| IA32_INST_RETIRED | IA-32 Instructions Retired | all |
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories instead of theories to suit facts.- Sherlock Holmes