Publication

Virtual Memory Window with Dynamic Prefetching Support

Paolo Ienne
2004
Patents

Abstract

Reconfigurable Systems-an-Chip (RSoCs) on the market consist of full -fledged processors and large Field -Programmable Gate Arrays (FPGAs). The latter can be used to implement the system glue logic, various peripherals, and application - specific coprocessors. Using FPGAs for application -specific coprocessors has certain speedup potentials, but it is less present in practice beca use of the complexity of interfacing the software application with the coprocessor. In the present application, we present a virtualisation layer consisting of an operating - system extension and a hardware component. It lowers the complexity of interfacing and increases portability potentials, while it also allows the coprocessor to access the user virtual memory through a virtual memory window. The burden of moving data between processor and coprocessor is shifted from the programmer to the operating system.

Official source

https://infoscience.epfl.ch/entities/publication/994330b5-cd5a-4d76-81e9-9167d98ea329

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Paolo Ienne
2004
Patents

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/994330b5-cd5a-4d76-81e9-9167d98ea329

About this result

Related concepts (32)

Virtual memory

In computing, virtual memory, or virtual storage, is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" which "creates the illusion to users of a very large (main) memory". The computer's operating system, using a combination of hardware and software, maps memory addresses used by a program, called virtual addresses, into physical addresses in computer memory.

Field-programmable gate array

A field-programmable gate array (FPGA) is an integrated circuit designed to be configured after manufacturing. The FPGA configuration is generally specified using a hardware description language (HDL), similar to that used for an application-specific integrated circuit (ASIC). Circuit diagrams were previously used to specify the configuration, but this is increasingly rare due to the advent of electronic design automation tools. FPGAs contain an array of programmable logic blocks, and a hierarchy of reconfigurable interconnects allowing blocks to be wired together.

Memory paging

In computer operating systems, memory paging (or swapping on some Unix-like systems) is a memory management scheme by which a computer stores and retrieves data from secondary storage for use in main memory. In this scheme, the operating system retrieves data from secondary storage in same-size blocks called pages. Paging is an important part of virtual memory implementations in modern operating systems, using secondary storage to let programs exceed the size of available physical memory.

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Virtual Memory Window with Dynamic Prefetching Support

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