Maximal temperature logging
View Patent ↗A computer implemented method, data processing system, and processor are provided for logging a maximal temperature in an integrated circuit. A digital thermal sensor senses a temperature in the integrated circuit. The sensed temperature of the digital thermal sensor is read and a determination is made as to whether the sensed temperature is higher than a current maximal temperature. The sensed temperature is logged in response to the sensed temperature being higher than the current maximal temperature. The sensed temperature becomes a new maximal temperature for the integrated circuit.
1. A computer implemented method for logging a maximal temperature in an integrated circuit, comprising:
sensing, by a digital thermal sensor, a temperature in the integrated circuit;
reading, by a thermal management control state machine residing within the integrated circuit, the sensed temperature of the digital thermal sensor;
determining, by a comparator residing within the integrated circuit, if the sensed temperature is higher than a current maximal temperature for the integrated circuit that was previously sensed and logged as being the maximal temperature in the integrated circuit;
in response to the sensed temperature being higher than the current maximal temperature, logging the sensed temperature in the integrated circuit, wherein the sensed temperature becomes a new maximal temperature for the integrated circuit, wherein the logging step comprises storing, by the state machine, the new maximal temperature in a maximum temperature status register within the integrated circuit;
determining, by the state machine, if a read of the new maximal temperature in the maximum temperature status register has occurred, wherein a device coupled to the integrated circuit performs the read of the new maximal temperature in the maximum temperature status register;
in response to the read of the maximum temperature status register: (i) reading, by the state machine, the sensed temperature of the digital thermal sensor, wherein the sensed temperature is the current maximal temperature of the integrated circuit, and (ii) replacing, by the state machine, the new maximal temperature in the maximum temperature status register with the current maximal temperature sensed by the digital thermal sensor;
determining, by the state machine, if the integrated circuit has been reset; and
in response to the integrated circuit being reset: (i) reading, by the state machine, the sensed temperature of the digital thermal sensor, wherein the sensed temperature is the current maximal temperature of the integrated circuit, and (ii) replacing, by the state machine, the new maximal temperature in the maximum temperature status register with the current maximal temperature sensed by the digital thermal sensor.
2. The method of claim 1 , further comprising:
in response to the sensed temperature being lower or equal to the current maximal temperature, maintaining, by the state machine, the current maximal temperature in the maximum temperature status register as the maximal temperature of the integrated circuit.
3. The method of claim 1 , wherein the integrated circuit is a heterogeneous multi-core processor.
4. The method of claim 1 , wherein a device coupled to the integrated circuit performs the reset of the new maximal temperature in the maximum temperature status register.
5. The method of claim 3 , wherein the digital thermal sensor resides within one of the cores of the heterogeneous multi-core processor.
6. The method of claim 3 , wherein the digital thermal sensor resides within the heterogeneous multi-core processor, but not within a core.