Patent application number | Description | Published |
20140195632 | IMMUTABLE SHARABLE ZERO-COPY DATA AND STREAMING - The environment and use of an immutable buffer. A computing entity acquires data or generates data and populates the data into the buffer, after which the buffer is classified as immutable. The classification protects the data populated within the immutable buffer from changing during the lifetime of the immutable buffer, and also protects the immutable buffer from having its physical address changed during the lifetime of the immutable buffer. As different computing entities consume data from the immutable buffer, they do so through views provided by a view providing entity. The immutable buffer architecture may also be used for streaming data in which each component of the streaming data uses an immutable buffer. Accordingly, different computing entities may view the immutable data differently without having to actually copy the data. | 07-10-2014 |
20140195739 | ZERO-COPY CACHING - Caching of an immutable buffer that has its data and address prevented from changing during the lifetime of the immutable buffer. A first computing entity maintains a cache of the immutable buffer and has a strong reference to the immutable buffer. So long as any entity has a strong reference to the immutable buffer, the immutable buffer is guaranteed to continue to exist for the duration of the strong reference. A second computing entity communicates with the first computing entity to obtain a strong reference to the immutable buffer and thereafter read data from the immutable buffer. Upon reading the data from the cache, the second computing entity demotes the strong reference to a weak reference to the immutable buffer. A weak reference to the immutable buffer does not guarantee that the immutable buffer will continue to exist for the duration of the weak reference. | 07-10-2014 |
20140195746 | DMA CHANNELS - Communicating between an application and a hardware device. A method includes an application writing data to host physical memory using an application view of the memory. The method further includes mapping the data in the physical memory to a hardware driver view, usable by a hardware driver, without needing to copy the data to a different physical storage location. The method further includes mapping the data to a hardware accessible view accessible by a hardware device without needing to copy the data to a different physical storage location | 07-10-2014 |
20140195834 | HIGH THROUGHPUT LOW LATENCY USER MODE DRIVERS IMPLEMENTED IN MANAGED CODE - Implementing a safe driver that can support high throughput and low latency devices. The method includes receiving a hardware message from a hardware device. The method further includes delivering the hardware message to one or more driver processes executing in user mode using a zero-copy to allow the one or more driver processes to support high throughput and low latency hardware devices. | 07-10-2014 |
20140195862 | SOFTWARE SYSTEMS BY MINIMIZING ERROR RECOVERY LOGIC - Handing errors in program execution. The method includes identifying a set including a plurality of explicitly identified failure conditions. The method further includes determining that one or more of the explicitly identified failure conditions has occurred. As a result, the method further includes halting a predetermined first execution scope of computing, and notifying another scope of computing of the failure condition. An alternative embodiment may be practiced in a computing environment, and includes a method handing errors. The method includes identifying a set including a plurality of explicitly identified failure conditions. The method further includes determining that an error condition has occurred that is not in the set including a plurality of explicitly identified failure conditions. As a result, the method further includes halting a predetermined first execution scope of computing, and notifying another scope of computing of the failure condition. | 07-10-2014 |
20140196004 | SOFTWARE INTERFACE FOR A HARDWARE DEVICE - Automatically generating code used with device drivers for interfacing with hardware. The method includes receiving a machine readable description of a hardware device, including at least one of hardware registers or shared memory structures of the hardware device. The method further includes determining an operating system with which the hardware device is to be used. The method further includes processing the machine readable description on a code generation tool to automatically generate code for a hardware driver for the hardware device specific to the determined operating system. | 07-10-2014 |
20140196059 | CAPABILITY BASED DEVICE DRIVER FRAMEWORK - Enforcing limitations on hardware drivers. The method includes from a system kernel, assigning I/O resources to the system's root bus. From the root bus, the method further includes assigning a subset of the I/O resources to a device bus. Assigning a subset of the I/O resources to a device bus includes limiting the device bus to only be able to assign I/O resources that are assigned to it by the root bus. From the device bus, the method includes assigning I/O resources to a device through a device interface. | 07-10-2014 |
20150089471 | INPUT FILTERS AND FILTER-DRIVEN INPUT PROCESSING - Input filters correlate to target components. For a given target component, the input filter defines input validation information. The input filter might also define conversions or transformations to be applied to valid input prior to being provided to the target component. At build time, code is accessed that contains the input validation, conversion and transformation and that identifies the associated target component. The information is then used to construct an input filter. At run time, when an input processing component receives an input, the input processing component identifies the target component, accesses the associated input filter, and uses the information contained in the input filter to determine whether the input is valid, and whether and how to convert and transform the value. | 03-26-2015 |