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- Scratchpad_memory abstract "Scratchpad memory (SPM), also known as scratchpad, scatchpad RAM or local store in computer terminology, is a high-speed internal memory used for temporary storage of calculations, data, and other work in progress. In reference to a microprocessor ("CPU"), scratchpad refers to a special high-speed memory circuit used to hold small items of data for rapid retrieval. It is similar the usage and size of a scratchpad in life: a pad of paper for preliminary notes or sketches or writings, etc.It can be considered similar to the L1 cache in that it is the next closest memory to the ALU after the internal registers, with explicit instructions to move data to and from main memory, often using DMA-based data transfer. In contrast with a system that uses caches, a system with scratchpads is a system with Non-Uniform Memory Access latencies, because the memory access latencies to the different scratchpads and the main memory vary. Another difference with a system that employs caches is that a scratchpad commonly does not contain a copy of data that is also stored in the main memory.Scratchpads are employed for simplification of caching logic, and to guarantee a unit can work without main memory contention in a system employing multiple processors, especially in multiprocessor system-on-chip for embedded systems. They are mostly suited for storing temporary results (as it would be found in the CPU stack) that typically wouldn't need to always be committing to the main memory; however when fed by DMA, they can also be used in place of a cache for mirroring the state of slower main memory. The same issues of locality of reference apply in relation to efficiency of use; although some systems allow strided DMA to access rectangular data sets. Another difference is that scratchpads are explicitly manipulated by applications.Scratchpads are not used in mainstream desktop processors where generality is required for legacy software to run from generation to generation, in which the available on-chip memory size may change. They are better implemented in embedded systems, special-purpose processors and game consoles, where chips are often manufactured as MPSoC, and where software is often tuned to one hardware configuration.".
- Scratchpad_memory wikiPageExternalLink banakar-scratchpad.pdf.
- Scratchpad_memory wikiPageID "5164981".
- Scratchpad_memory wikiPageRevisionID "593040348".
- Scratchpad_memory hasPhotoCollection Scratchpad_memory.
- Scratchpad_memory subject Category:Computer_memory.
- Scratchpad_memory comment "Scratchpad memory (SPM), also known as scratchpad, scatchpad RAM or local store in computer terminology, is a high-speed internal memory used for temporary storage of calculations, data, and other work in progress. In reference to a microprocessor ("CPU"), scratchpad refers to a special high-speed memory circuit used to hold small items of data for rapid retrieval.".
- Scratchpad_memory label "RAM scratchpad".
- Scratchpad_memory label "Scratchpad memory".
- Scratchpad_memory sameAs RAM_scratchpad.
- Scratchpad_memory sameAs m.0d5tlv.
- Scratchpad_memory sameAs Q3928159.
- Scratchpad_memory sameAs Q3928159.
- Scratchpad_memory wasDerivedFrom Scratchpad_memory?oldid=593040348.
- Scratchpad_memory isPrimaryTopicOf Scratchpad_memory.