The individual core power consumption with other cores powered down, also known as single core power consumption, refers to the power consumed by a single processing core in a multi-core processor when the other cores are turned off or put into a low power state.
The power consumption of a single core depends on various factors such as the frequency of the core, the voltage applied to it, and the workload running on it. In general, a higher frequency and voltage result in higher power consumption.
When other cores are powered down, the power consumed by the active core may increase due to increased contention for shared resources such as the memory controller and cache. However, it can also result in power savings as the inactive cores are not consuming power.
Measuring the individual core power consumption can be challenging as it requires specialized tools and techniques such as power profiling and dynamic voltage and frequency scaling (DVFS). These techniques allow for real-time monitoring and adjustment of the processor's power consumption based on the workload and power management policies.
Understanding individual core power consumption is important for optimizing the power efficiency of multi-core processors, especially in mobile devices and other battery-powered systems where power consumption is a critical factor.
