Dell Products Inc.

International Business Machines Corporation

Kevin Brian Locke

Travis Christian North

Joohyun Woo

Adolfo Sandor Montero

Austin Michael Shelnutt

Chris M Helberg

Andrew Olen Ingalls

Bradley Ryan Harrington

Yuan David Ma

Jian Xin Guo

Controlling an activation status of a proportional-integral-derivative (PID) controller for an information handling system cooling system, such as the on/off status of the PID controller, can reduce power consumption and processing and memory requirements for such a system. A decrease in resource consumption can be realized by deactivating the PID controller during certain periods and activating the PID controller during others. For example, the PID controller can be deactivated when a temperature of a system component falls below a threshold temperature and activated when the temperature of the system component rises above the threshold temperature.

Dynamic control of fan floor

Adjusting a cooling fan speed control profile to account for system implementation factors, such as ambient temperature and usage history, can optimize power consumption and reduce the volume and variation of sound generated by shifts in fan speed in response to changes in system and component temperature. Adjusting a cooling fan speed control profile may include adjusting a maximum fan speed based on an ambient temperature or component temperature of the information handling system.

Cooling fan speed control profile

Methods, systems, and computer programs encoded on computer storage medium, for detecting a throttling of a component; identifying a temperature of the component; calculating a thermal response for the component, including: setting the identified temperature as a maximum temperature, setting a first temperature lower than the maximum temperature, wherein for temperatures of the component less than the first temperature, the cooling fan system has a first fan speed, setting a second temperature between the first and the maximum temperature, wherein for temperatures of the component between the first and the second temperatures, a fan speed of the cooling fan system is linearly increased until an acoustic fan speed, setting a third temperature between the second and the maximum temperature, wherein for temperatures of the component between the second and third temperatures, maintaining the fan speed at the acoustic fan speed; applying the thermal response to the component.

Dynamic thermal responses for computing components

Control signals, such as PWM control signals, can be used to control aspects of a cooling system and can be generated using proportional-integral-derivative (PID) control. PID control systems for cooling systems are designed based on default environmental and system characteristics and pre-programmed for operation prior to delivery to customers or end users. Changes in environmental and system characteristics, such as component aging, environmental variations, and variation in manufacturing from system to system, such as heat sink effectiveness and application of thermal pastes, can impact system level performance of the control system. Adjusting gain parameters for the P, I, and D components of a PID control signal can reduce negative impact on system performance resulting from such changes and allow the control system to better adjust to external factors.

Active proportional-integral-derivative (PID) gain tuning for controlling a cooling system for an information handling system

A method for cooling system components of information handling systems may include generating a first pulse width modulation (PWM) control signal for controlling at least one cooling fan configured to cool a system component, filtering the first PWM control signal, and applying the filtered first PWM control signal to the at least one cooling fan. The first PWM control signal may be used to control a component fan and then filtered to generate a filtered first PWM control signal used to control a system fan. The filtering of the control signal may include dampening the control signal such that the control signal is less responsive to temperature changes as the temperature nears a set temperature.

Cooling fan filtering

Systems and methods are provided that may be implemented for facilitating user modification of cooling device speed response to sensed temperature in information handling systems. The disclosed systems and methods may be implemented to allow an information handling system user to modify how one or more individual cooling device/s respond to device speed control values specified by stored device speed control information without requiring the user to change the identity or pre-defined device speed values of the device speed control information with which the information system is currently operating.

Systems and methods for user modification of cooling device response in information handling systems

Methods and systems for implementing pre-boot software verification may involve using an embedded controller (EC) and a basic input/output system (BIOS) to confirm each other's firmware using hash values. The hash values may be generated from certain portions of the firmware, which may overlap and may be specific to a particular firmware version.

Pre-boot software verification

A system, method, and computer program product are disclosed for prohibiting unauthorized access to a protected region of memory. A protected region of memory and a trusted region of memory are both specified. A call to access a location within the protected region of memory is received. An origination location of the call is then determined. In response to a determination that the origination location is within the trusted region, the call is permitted to access the protected region of memory. In response to a determination that the origination location is outside of the trusted region, the call is prohibited from accessing the protected region of memory.

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Austin, TX, United States of America

Kevin Brian Locke