Level-based droop detection

An apparatus comprising:

• a power regulator configured to provide current to a processing unit;
• a clock distribution network configured to provide a clock signal to the processing unit;
• a level-based droop detector configured to monitor a voltage of the current provided to the processing unit and provide a droop detection signal to the clock distribution network in response to the voltage falling below a first threshold voltage;
• and
• wherein the clock distribution network is configured to decrease a frequency of a clock signal provided to the processing unit in response to receiving the droop detection signal.

An apparatus comprising:

• a power regulator configured to provide current at a voltage;
• at least one clock distribution network configured to provide a first clock signal to a first clock domain and a second clock signal to a second clock domain;
• a first level-based droop detector configured to monitor the voltage and provide a first droop detection signal to the clock distribution network in response to the voltage falling below a first threshold voltage;
• a second level-based droop detector configured to monitor the voltage and provide a second droop detection signal to the clock distribution network in response to the voltage falling below a second threshold voltage;
• wherein the at least one clock distribution network is configured to decrease a first frequency of the first clock signal provided to the first clock domain in response to receiving the first droop detection signal;
• and
• wherein the at least one clock distribution network is configured to decrease a second frequency of the second clock signal provided to the second clock domain in response to receiving the second droop detection signal.