Abstract: Methods, devices and systems enhance compression and decompression of data values when they comprise a plurality of semantically meaningful data fields. According to a first inventive concept of the present invention disclosure, compression is not applied to each data value as a whole, but instead to at least one of the semantically meaningful data fields of each data value, and in isolation from the other ones. A second inventive concept organizes the data fields that share the same semantic meaning together to accelerate compression and decompression as multiple compressors and decompressors can be used in parallel. A third inventive concept is a system where methods and devices are tailored to perform compression and decompression of the semantically meaningful data fields of floating-point numbers after first partitioning further at least one of said data fields into two or a plurality of sub-fields to increase the degree of value locality and improve compressibility of floating-point values.

Abstract: Methods, devices and systems enhance compression and decompression of data blocks of data values by selecting the best suited compression method and device among two or a plurality of compression methods and devices, which are combined together and which said compression methods and devices compress effectively data values of particular data types; said best suited compression method and device is selected using as main selection criterion the dominating data type in a data block by predicting the data types within said data block.

Abstract: A method of operating a multi-core processor. In one embodiment, each processor core is provided with its own private cache and the device comprises or has access to a common memory, and the method comprises executing a processing thread on a selected first processor core, and implementing a normal access mode for executing an operation within a processing thread and comprising allocating sole responsibility for writing data to given blocks of said common memory, to respective processor cores. The method further comprises implementing a speculative execution mode switchable to override said normal access mode. This speculative execution mode comprises, upon identification of said operation within said processing thread, transferring responsibility for performing said operation to a plurality of second processor cores, and optionally performing said operation on the first processor core as well.

Abstract: In one embodiment, a computer cache is extended with structures that can (1) establish the frequency by which distinct values occur in the cache and use that information to (2) compress values in caches into dense codes using a plurality of statistical-based compression techniques and (3) decompress densely coded values to realize caches that can store information densely that can be retrieved with low overhead.

Abstract: A method of operating a multi-core processor. In one embodiment, each processor core is provided with its own private cache and the device comprises or has access to a common memory, and the method comprises executing a processing thread on a selected first processor core, and implementing a normal access mode for executing an operation within a processing thread and comprising allocating sole responsibility for writing data to given blocks of said common memory, to respective processor cores. The method further comprises implementing a speculative execution mode switchable to override said normal access mode. This speculative execution mode comprises, upon identification of said operation within said processing thread, transferring responsibility for performing said operation to a plurality of second processor cores, and optionally performing said operation on the first processor core as well.

Abstract: In one embodiment, a computer cache is extended with structures that can (1) establish the frequency by which distinct values occur in the cache and use that information to (2) compress values in caches into dense codes using a plurality of statistical-based compression techniques and (3) decompress densely coded values to realize caches that can store information densely that can be retrieved with low overhead.