"Virtual address" and "virtual addressing" redirect here. For other uses, see Virtual address (disambiguation).
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In computing, a virtual address space (VAS) or address space is the set of ranges of virtual addresses that an operating system makes available to a process.[1] The range of virtual addresses usually starts at a low address and can extend to the highest address allowed by the computer's instruction set architecture and supported by the operating system's pointer size implementation, which can be 4 bytes for 32-bit or 8 bytes for 64-bit OS versions. This provides several benefits, one of which is security through process isolation assuming each process is given a separate address space.
^IBM Corporation. "What is an address space?". Retrieved August 24, 2013.
and 23 Related for: Virtual address space information
In computing, a virtualaddressspace (VAS) or addressspace is the set of ranges of virtualaddresses that an operating system makes available to a process...
an addressspace in a system with virtual memory corresponds to a highest level translation table, e.g., a segment table in IBM System/370. Address spaces...
addressspace or collection of contiguous segments. The operating system manages virtualaddressspaces and the assignment of real memory to virtual memory...
multiple virtualaddressspaces, the "extra memory" can be used to run more processes. Paging allows the cumulative total of virtualaddressspaces to exceed...
translations of virtual memory to physical memory. It is used to reduce the time taken to access a user memory location. It can be called an address-translation...
In computing, protected mode, also called protected virtualaddress mode, is an operational mode of x86-compatible central processing units (CPUs). It...
extending the virtualaddressspace, and uses additional physical address bits at all levels of the page table, extending the physical addressspace. It also...
structure used by a virtual memory system in a computer to store mappings between virtualaddresses and physical addresses. Virtualaddresses are used by the...
requests, known as virtual memory addresses, into physical addresses in main memory. In modern systems, programs generally have addresses that access the...
A virtual office is part of the flexible workspace industry that provides businesses with any combination of services, space and/or technology, without...
related to commit charge: Total is the amount of pagefile-backed virtualaddressspace in use, i.e., the current commit charge. This is composed of main...
size of the virtualaddressspace beyond the available amount of RAM using paging or swapping to secondary storage. The quality of the virtual memory manager...
computer operating system usually uses virtual memory to provide separate addressspaces called user space and kernel space. Primarily, this separation serves...
kernels, such as Linux, divide their virtualaddressspace into two regions, devoting the larger to user space and the smaller to the kernel. In current...
Accessing the page requires a mapping to be added to the process's virtualaddressspace. Besides, the actual page contents may need to be loaded from a...
forcing addressspaces to be non-overlapping, tagging the virtualaddress with an addressspace ID (ASID). Additionally, there is a problem that virtual-to-physical...
allow the processor to address 264 bytes (16 exabytes) of virtualaddressspace and 252 bytes (4 petabytes) of physical addressspace. x86-64 64-bit compatibility...
isolation can be implemented with virtualaddressspace, where process A's addressspace is different from process B's addressspace – preventing A from writing...
have different addressspaces: if on the same host machine, they have distinct virtualaddressspaces, even though the physical addressspace is the same;...
(no-execute) is a technology used in CPUs to segregate areas of a virtualaddressspace to store either data or processor instructions. An operating system...
implementations had a single virtualaddressspace, shared by all jobs. OS/VS1 is OS/360 MFT within a single virtualaddressspace; OS/VS2 SVS was OS/360 MVT...
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