Uncore Manual

Uncore Performance Monitoring
Power Control (PCU) Performance Monitoring
118 Reference Number: 329468-002
2.7.7 PCU Box Performance Monitor Event List
The section enumerates performance monitoring events for the PCU Box.
CLOCKTICKS
• Title: pclk Cycles
• Category: PCLK Events
• Event Code: 0x00
• Max. Inc/Cyc:. 1, Register Restrictions: 0-3
• Definition: The PCU runs off a fixed 800 MHz clock. This event counts the number of pclk cycles
measured while the counter was enabled. The pclk, like the Memory Controller's dclk, counts at a
constant rate making it a good measure of actual wall time.
CORE0_TRANSITION_CYCLES
• Title: Core 0 C State Transition Cycles
• Category: CORE_C_STATE_TRANSITION Events
• Event Code: 0x70
• Max. Inc/Cyc:. 1, Register Restrictions: 0-3
• Definition: Number of cycles spent performing core C state transitions. There is one event per
core.
• NOTE: This only tracks the hardware portion in the RCFSM (CFCFSM). This portion is just doing the
core C state transition. It does not include any necessary frequency/voltage transitions.
CORE10_TRANSITION_CYCLES
• Title: Core 10 C State Transition Cycles
• Category: CORE_C_STATE_TRANSITION Events
• Event Code: 0x7a
• Max. Inc/Cyc:. 1, Register Restrictions: 0-3
• Definition: Number of cycles spent performing core C state transitions. There is one event per
core.
CORE11_TRANSITION_CYCLES
• Title: Core 11 C State Transition Cycles
• Category: CORE_C_STATE_TRANSITION Events
• Event Code: 0x7b
• Max. Inc/Cyc:. 1, Register Restrictions: 0-3
Symbol Name:
Definition
Equation
PCT_CYC_FREQ_CURRENT_LTD:
Percentage of Cycles the Max Frequency is
limited by current
FREQ_MAX_CURRENT_CYCLES / CLOCKTICKS
PCT_CYC_FREQ_OS_LTD:
Percentage of Cycles the Max Frequency is
limited by the OS
FREQ_MAX_OS_CYCLES / CLOCKTICKS
PCT_CYC_FREQ_POWER_LTD:
Percentage of Cycles the Max Frequency is
limited by power
FREQ_MAX_POWER_CYCLES / CLOCKTICKS
PCT_CYC_FREQ_THERMAL_LTD:
Percentage of Cycles the Max Frequency is
limited by thermal issues
FREQ_MAX_CURRENT_CYCLES / CLOCKTICKS