International Business Machines Corporation

Pradeep Bhadravati Parashurama

Alper Buyuktosunoglu

Tobias Webel

Preetham M Lobo

Ramon Bertran Monfort

Christian Jacobi

Phillip John Restle

Andrew A Turner

Eberhard Engler

Srinivas Bangalore Purushotham

Sean Michael Carey

Edward C McCain

Kennedy K Cheruiyot

Alejandro Alberto Cook Lobo

Kevin P Low

Karl Evan Smock Anderson

Daniel Kiss

Isidore G Bendrihem

Ian Krispin Carmichael

Martin Recktenwald

Gregory Scott Still

Eric Jason Fluhr

Nitish Jindal

Ramon Betran Monfort

Archit Kapoor

A computer-implemented method for detecting n-level slopes for a voltage level in a processor, wherein n is greater than 1, includes monitoring a voltage in a processor for a voltage level corresponding to a predefined first edge, and monitoring for a voltage level corresponding to a predefined second edge within a first count limit from detection of the predefined first edge. In response to detecting the predefined second edge within the first count limit, the computer-implemented method includes monitoring for a voltage level corresponding to a predefined third edge within a second count limit from detection of the predefined second edge, and in response to detecting the predefined third edge within the second count limit, determining whether to adjust a power applied to the processor based on the monitored voltage levels.

Voltage droop and overshoot management using non-linear slope detection

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.

Embodiments relate to a system, program product, and method for mitigating voltage overshoot in one or more cores in a multicore processing device including a plurality of cores. The method includes determining, in real-time, an indication of power consumption within each core of the one or more cores. The method also includes determining, through the indication of power consumption, a voltage overshoot condition in the one or more cores. The method further includes increasing, for the one or more cores, a power demand thereof. The method also includes increasing, subject to the increasing the power demand, power delivery to the one or more cores, thereby at least arresting the rate of increase of the voltage overshoot.

Voltage overshoot management

Embodiments relate to a system, program product, and method for proactively initiating throttle action on one or more cores in a multicore processing device to mitigate voltage droop therein. The method includes determining, in real-time, an indication of stall events within the core and determining one or more resolutions of the stall events. The method also includes determining, in real-time, a timing margin value for the core and predicting inducement of a voltage droop on the core. The method further includes integrating the resolutions of the stall events and the timing margin value for the core, determining, subject to the predicting, a throttle action for the core, and executing the throttle action on the core.

Voltage droop management through microarchitectural stall events

Various embodiments are provided for providing optimized margins of processors in a computing environment. Margins of voltage, frequency, or a combination thereof may be dynamically monitored and adjusted for a executing a processor based a workload scheduled during an event.

Dynamically optimizing margins of a processor

Embodiments are disclosed for managing voltage droop. The techniques include performing a first determination that a timing margin is less than a first threshold. The techniques also include performing a second determination that an increase in processor activity exceeds a second threshold. Additionally, the techniques include determining that a voltage droop is indicated based on the first determination and the second determination. Further, the techniques include signaling a plurality of throttling circuits for a corresponding plurality of cores of a computer processor to actuate.

Mitigating voltage droop

An aspect includes a plurality of throttle controllers having a modular hierarchy comprising a plurality of levels within each of a plurality of processor cores that control a plurality of throttling actions. The throttling actions include dynamic adjustment of execution suspension within the processor cores. A plurality of input throttle events at each of the processor cores is resolved based on the modular hierarchy. A chip controller coupled to the processor cores can synchronize the throttling actions between the processor cores.

Multi-layered processor throttle controller

Growing community of inventors

Bhadravati, India

Pradeep Bhadravati Parashurama