Microsoft Technology Licensing, LLC

Christopher Peter Kleynhans

Mehmet Iyigun

Yevgeniy Bak

Eric J Horvitz

Christopher A Meek

Arun Upadhyaya Kishan

Hari R Pulapaka

Michael Richard Fortin

Asela J Gunawardana

Jason Lin

Kevin Michael Broas

Tristan Anthony Brown

Ahmad Bilal

Gregory John Colombo

Paul B Koch

Michael Bishop Ebersol

Sandeep Prabhakar

Ahmed Saruhan Karademir

Wen Jia Liu

Mark Allan Bellon

Rich Caruana

Syed A Raza

Milos Kralj

Stephen Louis-Essman Hufnagel

Mika Megan Latimer

Shawn Michael Denbow

Rahul Narayanan Nair

Systems and methods for managing a power budget are provided. The method includes designating, by a power budget manager implemented on at least one processor, each of one or more applications with an individual quality of service (QoS) designation, the one or more applications executable by the at least one processor, assigning, by the power budget manager, a throttling priority to each of the one or more applications based on the individual QoS designations, determining, by the power budget manager, whether a platform mitigation threshold is exceeded, and responsive to determining that the platform mitigation threshold is exceeded, throttling, by the power budget manager, processing power allocated to at least one application of the one or more applications based on the throttling prioritization.

Power budget management using quality of service (QoS)

Communicating a low-latency event across a virtual machine boundary. Based on an event signaling request by a first process running at a first virtual machine, the first virtual machine updates a shared register that is accessible by a second virtual machine. Updating the shared register includes updating a signal stored in the shared register. The first virtual machine sends an event signal message, which includes a register identifier, through a virtualization fabric to the second virtual machine. The second virtual machine receives the event signaling message and identifies the register identifier from the message. Based on the register identifier, the second virtual machine reads the shared register, identifying a value of the signal stored in the shared register. Based at least on the value of the signal comprising a first value, the second virtual machine signals a second process running at the second virtual machine.

Low-latency events across a virtual machine boundary

The threads of a user mode process can access various different resources of a computing device, and such access can be serialized. To access a serialized resource, a thread acquires a lock for the resource. For each context switch in the computing device, a module of the operating system kernel checks for priority inversions, which is a situation in which a higher priority thread of the user mode process is waiting for (blocking on) a resource for which a lower priority thread has acquired a lock. In response to detecting such a priority inversion, the priority of the lower priority thread is boosted to allow the priority thread to execute and eventually release the lock that the higher priority thread is waiting for.

Boosting user thread priorities to resolve priority inversions

Systems and methods of pre-launching applications in a computer system, said applications being likely to be activated by a user from a terminated and/or suspended process state, are disclosed. The pre-launching of an application may be based on the assessed probability of the application being activated&#x2014;as well as the level of availability of system resources to affect such pre-launching. Applications may be pre-launched based on these and other conditions/considerations, designed to improve the user's experience of a quick launch of applications in the background. Several prediction models are presented to provide a good estimate of the likelihood of an application being activated by a user. Such prediction models may comprise an adaptive predictor (based on past application usage situations) and/or a switch rate predictor (based on historic data of an application being switched and, possibly, having a decay rate applied to such switch rate measure).

Predictive pre-launch for applications

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Bellevue, WA, United States of America

Christopher Peter Kleynhans