Retired Conditional Branches

PAPI_BR_CN

The retired conditional branches performance counter is deterministic on certain systems.

Pentium Pro, II, III
AMD
Atom
Core2
- BR_CND_EXEC (r53008b:u) -- This instruction also counts interrupts and page faults.
Nehalem
- BR_INST_RETIRED:CONDITIONAL (r5301c4:u) -- This instruction _is_ deterministic. However it overcounts. Any instruction starting with opcode 0x0f or 0xdf counts. This includes conditional branches, but also various MMX instructions.
SandyBridge
- BR_INST_RETIRED:CONDITIONAL (r5301c4:u) -- This instruction _is_ deterministic.
Pentium D