International Business Machines Corporation

Isidore G Bendrihem

Phillip John Restle

Ian Krispin Carmichael

Christian Jacobi

Alper Buyuktosunoglu

Gregory Scott Still

Tobias Webel

Andrew A Turner

Eric Jason Fluhr

Eberhard Engler

Edward C McCain

Sean Michael Carey

Kennedy K Cheruiyot

Pradeep Bhadravati Parashurama

Alejandro Alberto Cook Lobo

Kevin P Low

Daniel Kiss

Karl Evan Smock Anderson

Michael Stephen Floyd

Brian Thomas Vanderpool

Francesco A Campisano

Richard L Willaman

Rahul Batra

Eric Marz

Michael N Goulet

Rory Tatum

Providing deterministic frequency and voltage enhancements for a processor is disclosed. In an embodiment, a microcontroller on a processor identifies a plurality of parameters related to a processor, the plurality of parameters including at least a current supplied to the processor; determines, in dependence upon the plurality of parameters, one or more frequency scaling indexes including determining an effective switching capacitance ratio; identifies, in dependence upon the one or more frequency scaling indexes, a predetermined frequency parameter for the processor; and transitions, based on the frequency parameter, the processor to a target clock frequency. In another embodiment, a microcontroller on a processor decreases, incrementally, a power supply voltage for a processor; determines that a voltage droop parameter exceeds a voltage droop parameter threshold; and increases, incrementally, the power supply voltage in response to determining that the voltage droop parameter exceeds a voltage droop parameter threshold.

Providing deterministic frequency and voltage enhancements for a processor

Embodiments include in response to monitoring a processor during operation, detecting a first number of throttling amounts in the processor, determining that the first number of throttling amounts fulfills a first condition regarding a throttling amounts threshold, and modifying a voltage level of the processor by a first amount. Embodiments include in response to modifying the voltage level of the processor by the first amount, detecting a second number of throttling amounts in the processor, determining that the second number of throttling amounts fulfills a second condition regarding the throttling amounts threshold, and modifying the voltage level of the processor by a second amount.

Dynamic guard band with timing protection and with performance protection

Embodiments include in response to monitoring a processor during operation, detecting a first number of core recovery events in the processor, determining that the first number of core recovery events fulfills a first condition for the first core recovery events threshold, and modifying a value of at least one droop sensor parameter of the processor by a first amount. The at least one droop sensor parameters affects a sensitivity to a voltage droop. In response to modifying the value of the droop sensor parameter by the first amount, a second number of core recovery events is detected in the processor. It is determined that the second number of core recovery events fulfills a second condition for a second core recovery events threshold, and the value of the at least one droop sensor parameter is modified by a second amount.

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FORT LEE, NJ, United States of America

Isidore G Bendrihem