Red Hat, Inc.

Recognitionfocus Gmbh

Torvald Riegel

Joachim Ihlefeld

Marc Schulze

A device and a method that can be used to perform a correspondence analysis in image data in a particularly low-noise and efficient manner. The device and method include selecting image patches from individual images and generating a plurality of one-dimensional signals using even and odd convolution kernels in the spatial window in each case, and processing differences between the convolution results in a non-linear manner and accumulating these differences to form a correspondence function and evaluating this function.

Device and method for correspondence analysis in images

Systems and methods for waking up waiting processing streams in a manner that reduces the number of spurious wakeups. An example method may comprise: assigning identifiers of a sequence of identifiers to wakeup signals and to processing streams, the sequence of identifiers representing a chronological order that the wakeup signals are initiated and the processing streams begin waiting, wherein each of the identifiers is exclusively assigned to either a wakeup signal or a processing stream and the sequence of identifiers comprises a first identifier associated with a wakeup signal; and responsive to receiving the wakeup signal, avoiding waking a processing stream associated with an identifier greater than the first identifier.

Wake-up ordering of processing streams using sequential identifiers

Systems and methods for sharing resources between multiple processing streams. An example method may comprise: maintaining, by a processing device, a first variable indicating a number of processing streams waiting to access a resource; performing an operation on a second variable comprising a first portion and a second portion, the operation comprising updating the first portion to reflect a number of available units of the resource and further comprising reading the second portion reflecting a value of the first variable.

Utilizing access control data structures for sharing computing resources

Systems and methods for waking up waiting processing streams in a manner that reduces the number of spurious wakeups. An example method may comprise: assigning a first identifier of a sequence of identifiers to a processing stream in a waiting state; receiving a wakeup signal associated with a second identifier of the sequence of identifiers; comparing, by a processing device, the first identifier with the second identifier; and waking the processing stream responsive to determining, in view of comparing, that the processing stream began waiting prior to an initiation of the wakeup signal.

Systems and methods for sharing resources between multiple processing streams. An example method may comprise: maintaining, by a processing device, a first variable identifying a number of processing streams waiting to access a resource; performing an atomic operation on a second variable comprising a first portion and a second portion, the atomic operation comprising incrementing the first portion to reflect a number of available units of the resource and further comprising reading the second portion reflecting a value of the first variable.

A method includes identifying a set of instructions to be executed as a transaction that is to access a section of memory, prior to executing the set of instructions as the transaction, facilitating a non-speculative access to a data cache, the data cache comprising a plurality of cache lines, each cache line comprising a lock to lock a respective portion of the memory, determining if the section of memory is available for the transaction in view of locks of the plurality of cache lines, and in response to a determination that the section of memory is not available, causing the non-speculative access to the data cache to be repeated.

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Dresden, Germany

Torvald Riegel