Apple Inc.

Matthew G Watson

James Michael Magee

Dallas Blake De Atley

Eric J Albert

Jerrold Von Hauck

Mitchell David Adler

James C Wilson

Michael D Ford

Keith Alan Cox

Michael F Culbert

Donald Joseph Novotney

Alexei Elias Kosut

Neil Gareth Crane

Andrew Bradley Just

Steve Zellers

David Matthew Powers

Daniel Ariel West

Scott James Forstall

Dominic Benjamin Giampaolo

Gregory B Novick

Cahya Adiansyah Masputra

Joseph Sokol, Jr

Lionel Divyang Desai

David W Goodwin

Curtis Galloway

Lucia Elena Ballard

Benjamin C Trumbull

Matthew Reda

Christopher Marcellino

Charles Srisuwananukorn

Ananthakrishna Ramesh

Daniel E Crosby

Nicholas William Colby Gillett

Eric Albert

David Powers

A method and an apparatus for determining a usage level of a memory device to notify a running application to perform memory reduction operations selected based on the memory usage level are described. An application calls APIs (Application Programming Interface) integrated with the application codes in the system to perform memory reduction operations. A memory usage level is determined according to a memory usage status received from the kernel of a system. A running application is associated with application priorities ranking multiple running applications statically or dynamically. Selecting memory reduction operations and notifying a running application are based on application priorities. Alternatively, a running application may determine a mode of operation to directly reduce memory usage in response to a notification for reducing memory usage without using API calls to other software.

Memory management methods and systems

Some embodiments provide, for a particular device in a set of related devices, a method for backing up data synchronized between the set of related devices. The method stores the backup data encrypted with a set of data encryption keys. The method also stores the set of data encryption keys encrypted with a master recovery key. The method also stores several copies of master recovery key data, each copy of the master recovery key data encrypted with a public key of a different one of the related devices. The backup data is only recoverable by accessing a private key of any one of the related devices.

Backup system with multiple recovery keys

Some embodiments provide, for a particular device in a set of related devices, a method for backing up data synchronized between the devices. The method receives a command to create a backup for a subset of data synchronized between a subset of the devices, which is a subset of all data synchronized between the devices. The method identifies the subset of synchronization data from the set of all synchronization data. The subset of synchronization data is tagged as pertaining to a particular set of criteria for synchronization between only the subset of devices. The method stores a backup of the subset of synchronization data in a backup storage encrypted in such a way that requires a recovery key associated with any one of the devices in the subset of devices to access the backup while preventing access to the backup with recovery keys of any of the other devices.

Backup accessible by subset of related devices

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for data storage. In one aspect, a method includes the actions of identifying a running query from an application; determining one or more data items of a plurality of data items that the application has permission to view according to one or more application specific access policies; and presenting the one or more data items to the application while not presenting other data items of the plurality of data items.

Cloud storage

Systems, methods, and computer program products for target memory pressure event notifications are disclosed. Processes running on a device can register to receive memory pressure event notifications from a memory management system, which are sent while memory pages are being reclaimed. Active processes running on a device processor can be assigned a priority that ranges from low to high. Responsive to a memory pressure event occurring on the device, the memory management system determines whether less than a threshold number of high priority processes are active on the device. If so, the memory management system sends a memory pressure event notification to the registered process with the lowest priority among the active processes.

Targeted memory pressure event notifications

Services for a personal electronic device are provided through which a form of background processing or multitasking is supported. The disclosed services permit user applications to take advantage of background processing without significant negative consequences to a user's experience of the foreground process or the personal electronic device's power resources. To effect the disclosed multitasking, one or more of a number of operational restrictions may be enforced. By way of example, thread priority levels may be overlapped between the foreground and background states. In addition, system resource availability may be restricted based on whether a process is receiving user input. In some instances, an application may be suspended rather than being placed into the background state. Implementation of the disclosed services may be substantially transparent to the executing user applications and, in some cases, may be performed without the user application's explicit cooperation.

Opportunistic multitasking

A thermal manager has a digital filter whose input is to receive raw temperature values from a sensor and whose output is to provide processed or filtered temperature values according to a filter function that correlates temperature at the sensor with temperature at another location in the device. The thermal manager has a look-up table that further correlates temperature at the sensor with temperature at the other location. The look-up table contains a list of processed temperature sensor values, and/or a list of temperatures representing the temperature at the other location, and their respective power consumption change commands. The thermal manager accesses the look-up table using selected, filtered temperature values, to identify their respective power consumption change commands. The latter are then evaluated and may be applied, to mitigate a thermal at the other location. Other embodiments are also described and claimed.

Thermal management techniques in an electronic device

A method, computer program and device for the translation of typed data objects in a heterogeneous computational environment is described. The operating system (or installed shared code libraries) translates typed data objects from a first format (e.g., big-endian) to a second format (e.g., little-endian) if the application sending the object and the application receiving the object utilize different formats. By placing data object format translation capabilities into the operating system, the software development effort required to permit an application (e.g., a user-level application) to execute in a heterogeneous environment is significantly reduced.

Typed-data translation for platform independence

Growing community of inventors

San Francisco, CA, United States of America

Matthew G Watson