• Thumbnail for Virtual memory
    In computing, virtual memory, or virtual storage, is a memory management technique that provides an "idealized abstraction of the storage resources that...
    43 KB (5,348 words) - 13:00, 2 July 2025
  • Thumbnail for Memory management unit
    references to memory, and translates the memory addresses being referenced, known as virtual memory addresses, into physical addresses in main memory. In modern...
    49 KB (7,099 words) - 18:50, 8 May 2025
  • In computer science, memory virtualization decouples volatile random access memory (RAM) resources from individual systems in the data center, and then...
    9 KB (941 words) - 13:21, 8 November 2024
  • physical memory of the system. For historical reasons, this technique is sometimes referred to as swapping. When combined with virtual memory, it is known...
    43 KB (5,453 words) - 17:18, 20 May 2025
  • A page, memory page, or virtual page is a fixed-length contiguous block of virtual memory, described by a single entry in a page table. It is the smallest...
    21 KB (2,108 words) - 17:14, 20 May 2025
  • Virtual memory compression (also referred to as RAM compression and memory compression) is a memory management technique that utilizes data compression...
    24 KB (2,667 words) - 07:09, 26 May 2025
  • Thumbnail for Memory management
    devised that increase the effectiveness of memory management. Virtual memory systems separate the memory addresses used by a process from actual physical...
    26 KB (3,004 words) - 18:09, 2 July 2025
  • Thumbnail for Virtual machine
    evolves virtual memory for purposes of virtualization, new systems of memory overcommitment may be applied to manage memory sharing among multiple virtual machines...
    32 KB (3,512 words) - 22:56, 1 June 2025
  • Thumbnail for Virtualization
    computing, virtualization (abbreviated v12n) is a series of technologies that allows dividing of physical computing resources into a series of virtual machines...
    37 KB (4,243 words) - 10:52, 3 July 2025
  • often referred to as just VMS, is a multi-user, multiprocessing and virtual memory-based operating system. It is designed to support time-sharing, batch...
    104 KB (9,238 words) - 21:57, 27 June 2025
  • Thumbnail for Virtual address space
    other virtual memory operating systems. When a new application on a 32-bit OS is executed, the process has a 4 GiB VAS: each one of the memory addresses...
    7 KB (739 words) - 00:25, 12 May 2025
  • Thumbnail for Operating system
    for example, virtual memory can provide a program with the illusion of nearly unlimited memory that exceeds the computer's actual memory. Operating systems...
    70 KB (8,176 words) - 14:39, 31 May 2025
  • low-level dynamic memory allocation code in the operating system, when mapping virtual memory to physical memory. A virtual memory subsystem that lacks...
    4 KB (404 words) - 20:50, 28 July 2023
  • Thumbnail for IBM System/370 Model 155
    the IBM System/370 line of computers. Since none of them came with virtual memory, "which was to be a hallmark of the 370 line", some said about these...
    7 KB (668 words) - 09:09, 12 May 2024
  • Thumbnail for Input–output memory management unit
    CPU-visible virtual addresses to physical addresses, the IOMMU maps device-visible virtual addresses (also called device addresses or memory mapped I/O...
    12 KB (1,307 words) - 00:46, 15 February 2025
  • Thumbnail for Computer memory
    the computer memory can be transferred to storage; a common way of doing this is through a memory management technique called virtual memory. Modern computer...
    29 KB (3,273 words) - 01:52, 25 June 2025
  • the computer's physical memory, or be flagged as being protected. Virtual memory makes it possible to have a linear virtual memory address space and to use...
    18 KB (2,268 words) - 16:46, 24 January 2025
  • pages of [virtual] memory. To implement memory ballooning, the virtual machine's kernel implements a "balloon driver" that allocates unused memory within...
    2 KB (241 words) - 01:01, 9 May 2024
  • A memory-mapped file is a segment of virtual memory that has been assigned a direct byte-for-byte correlation with some portion of a file or file-like...
    17 KB (2,011 words) - 16:08, 17 June 2025
  • Thumbnail for IBM System/370 Model 145
    Model 145 did not support virtual memory. Unlike the earlier Model 155 and 165 systems, for which an upgrade to virtual memory required the purchase of...
    7 KB (610 words) - 10:26, 12 May 2024
  • Thumbnail for Digital signal processor
    operating systems, but have no support for virtual memory or memory protection. Operating systems that use virtual memory require more time for context switching...
    26 KB (2,924 words) - 08:07, 4 March 2025
  • Thumbnail for IBM System/360 Model 67
    notably a Dynamic Address Translation unit, the "DAT box", to support virtual memory, 32-bit addressing and the 2846 Channel Controller to allow sharing...
    30 KB (2,700 words) - 19:01, 28 August 2024
  • Thumbnail for Memory hierarchy
    general memory hierarchy structuring. Many other structures are useful. For example, a paging algorithm may be considered as a level for virtual memory when...
    12 KB (1,204 words) - 23:21, 8 March 2025
  • Thumbnail for 64-bit computing
    machine code with 64-bit virtual memory addresses. However, not all 64-bit instruction sets support full 64-bit virtual memory addresses; x86-64 and AArch64...
    59 KB (7,367 words) - 08:07, 27 June 2025
  • Thumbnail for Memory address
    addresses (actual locations in hardware memory) were the same. However, with the introduction of virtual memory most application programs do not deal directly...
    18 KB (2,257 words) - 20:42, 30 May 2025
  • Thumbnail for Kernel (operating system)
    systems, a program's virtual address may refer to data which is not currently in memory. The layer of indirection provided by virtual addressing allows the...
    83 KB (10,153 words) - 05:39, 23 June 2025
  • Thumbnail for VAX
    acronym for virtual address extension) is a series of computers featuring a 32-bit instruction set architecture (ISA) and virtual memory that was developed...
    33 KB (3,189 words) - 02:40, 29 June 2025
  • (CPUs). It allows system software to use features such as segmentation, virtual memory, paging and safe multi-tasking designed to increase an operating system's...
    48 KB (4,371 words) - 13:25, 24 June 2025
  • Presence of this population in humans is currently under investigation. Virtual memory T cell (TVM): As of now, the only function apparent in TVM cells is...
    32 KB (3,781 words) - 20:52, 25 May 2025
  • see virtual memory for elaboration. One early virtual memory system, the IBM M44/44X, required an access to a mapping table held in core memory before...
    97 KB (13,327 words) - 11:22, 3 July 2025