CPU C-states are core power states requested by the Operating System Directed Power Management (OSPM) infrastructure that define the degree to which the processor is "sleeping". C0 indicates a normal operation. All other C-states (C1-Cn) describe states where the processor clock is inactive (cannot execute instructions) and different parts of the processor are powered down. Deeper C-states have longer exit latencies (the time to transition back to C0) but save more power. The processor can override an OSPM request and automatically demote a specific C-state request. For example, the OSPM may request C6 but the processor may actually use C3.
If a C-state transition entered multiple C-states (for example, C2 and C4) during a single transition, the VTune Amplifier defines and displays it as Cx sleep state.
Note
Power analysis is supported only on Linux* OS. On Windows* OS, you may import and view results collected on a Linux OS.
See Also
Supplemental documentation specific to a particular Intel Studio may be available at <install-dir>\<studio>\documentation\ .