Intel C2550 FH8065401488912 Data Sheet
Product codes
FH8065401488912
Volume 2—Power Management—C2000 Product Family
Performance States
Intel
®
Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 2 of 3
September 2014
166
Order Number: 330061-002US
9.10.2
Software P-State Requests
A P-State is a software-visible frequency/voltage operating point. The OS, BIOS, or any
Ring-0 software has the permissions to make P-State change requests.
9.10.2.1
Windows 7: P-State Transitions with ACNT/MCNT
• P-States are evaluated every 100 ms (configurable)
• Transitions are every 100-300 ms (configurable)
• Uses processor utilization and ActualCount/MaxCount (ACNT/MCNT) feedback if
• Transitions are every 100-300 ms (configurable)
• Uses processor utilization and ActualCount/MaxCount (ACNT/MCNT) feedback if
available
• P-State TARGET = %Busy * ACNT/MCNT
• ACNT and MCNT counters reset each sampling period (same as idle accounting)
• Uses pre-calculated increase/decrease levels
• ACNT and MCNT counters reset each sampling period (same as idle accounting)
• Uses pre-calculated increase/decrease levels