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Process in a computer system where entries in a cache are replaced or removed
Cache invalidation is a process in a computer system whereby entries in a cache are replaced or removed. It can be done explicitly, as part of a cache
Cache_invalidation
System for optimizing the Web
(HTTP) defines three basic mechanisms for controlling caches: freshness, validation, and invalidation. This is specified in the header of HTTP response messages
Web_cache
Equivalence of all cached copies of a memory location
computer architecture, cache coherence is the uniformity of shared resource data that is stored in multiple local caches. In a cache coherent system, if
Cache_coherence
an "Invalidation" transaction is sent on the bus to invalidate all the other caches. - The cache is set (or remains) M and all the other caches are set
List of cache coherency protocols
List_of_cache_coherency_protocols
Component of the Linux kernel's device mapper
device, avoiding the cache, while all writes go directly to the origin device; any cache write hits also cause invalidation of the cached blocks. The pass-through
Dm-cache
integrated internal cache instead. Cache walking on deletes or invalidation events: Cache designs that leverage external cache engines such as Redis or Hazelcast
Database_caching
Cache coherence protocol for computer processors
CPU can't scan the invalidation queue, as that CPU and the invalidation queue are physically located on opposite sides of the cache. As a result, memory
MESI_protocol
Open source distributed memory caching system
a correct or incomplete cache. An alternate cache-invalidation strategy is to store a random number in an agreed-upon cache entry and to incorporate
Memcached
Feature of computer systems
signaled to the cache controller which then performs a cache invalidation for DMA writes or cache flush for DMA reads. Non-coherent systems leave this to
Direct_memory_access
Instruction for x86 microprocessors
hugepage) L : cache-line size (e.g. 32L = 32-byte cache line size) S : cache sector size (e.g. 2S means that the cache uses sectors of 2 cache-lines each)
CPUID
Usage methods of multi-level caches
and L2. Now, if there is an eviction from L2, the L2 cache sends a back invalidation to the L1 cache, so that inclusion is not violated. As illustrated
Cache_inclusion_policy
through the addition of a 'volatile' bit tag, providing control over cache invalidation, and reducing the impact of simultaneous graphical and general purpose
PlayStation 4 technical specifications
PlayStation_4_technical_specifications
Set of computers configured in a distributed computing system
window Array Coordination Multiprocessing Memory coherence Cache coherence Cache invalidation Barrier Synchronization Application checkpointing Programming
Computer_cluster
Cache in the Linux kernel's block layer
I/O is not cached, to avoid rapid SSD cache invalidation on such operations that are already suitable enough for HDDs; going around the cache for big sequential
Bcache
Programming paradigm in which many processes are executed simultaneously
caches that may store the same value in more than one location, with the possibility of incorrect program execution. These computers require a cache coherency
Parallel_computing
Source code that alters its instructions to the hardware while executing
located within a few bytes to the one of the modifying code. The cache invalidation issue on modern processors usually means that self-modifying code
Self-modifying_code
Transaction tracker in computer systems
action to ensure cache coherency. The action can be a flush or an invalidation of the cache block. It also involves a change of cache block state depending
Bus_snooping
operation. Instead, all invalidation is done by writes to main memory. For any given pair of caches, the permitted states of a given cache line are as follows
Write-once_(cache_coherence)
Computer memory management instruction
computing, a cache control instruction is a hint embedded in the instruction stream of a processor intended to improve the performance of hardware caches, using
Cache_control_instruction
Message-passing system for parallel computers
window Array Coordination Multiprocessing Memory coherence Cache coherence Cache invalidation Barrier Synchronization Application checkpointing Programming
Message_Passing_Interface
Cache coherence protocol
Owned cache line, it must notify the other processors which are sharing that cache line. The standard implementation simply tells them to invalidate their
MOESI_protocol
Scalable coherence technique
engineering, directory-based cache coherence is a type of cache coherence mechanism, where directories are used to manage caches in place of bus snooping
Directory-based cache coherence
Directory-based_cache_coherence
Network packet distribution with multiple cores
another hardware supported technique, born with the idea of leveraging cache locality to improve performances by routing incoming packet flows to specific
Multi-core network packet steering
Multi-core_network_packet_steering
File system structure for locating files
may be called the directory name lookup cache (DNLC), directory entry cache, or dcache. Directory lookup caches store mappings between absolute or relative
Directory_(computing)
update based cache coherence protocol used in multi-processor systems. Write propagation is performed by directly updating all the cached values across
Dragon_protocol
Supercomputer at the University of Illinois Urbana-Champaign, United States
window Array Coordination Multiprocessing Memory coherence Cache coherence Cache invalidation Barrier Synchronization Application checkpointing Programming
Blue_Waters
Hardware
A CPU cache is a piece of hardware that reduces access time to data in memory by keeping some part of the frequently used data of the main memory in a
Cache performance measurement and metric
Cache_performance_measurement_and_metric
Algorithm for caching data
remove it from the cache, in case of a tie (i.e., two or more keys with the same frequency), the least recently used key would be invalidated. Ideal LFU: there
Least_frequently_used
Use of widely distributed computer resources to reach a common goal
window Array Coordination Multiprocessing Memory coherence Cache coherence Cache invalidation Barrier Synchronization Application checkpointing Programming
Grid_computing
Authorization software system
content being accessed. The system uses techniques such as cache prefetching and selective invalidation of frequently accessed permissions to reduce latency
Google_Zanzibar
Processor design concept
and processor design, a translation lookaside buffer (TLB) is a memory cache that stores the recent translations of virtual memory addresses to physical
Translation_lookaside_buffer
Intel cache and memory coherence protocol
The MESIF protocol is a cache coherency and memory coherence protocol developed by Intel for cache coherent non-uniform memory architectures. The protocol
MESIF_protocol
Computing protocol
the cache. These states correspond to the Exclusive, Shared, and Modified states of the MESI protocol. This protocol never triggers an invalidation (via
Firefly (cache coherence protocol)
Firefly_(cache_coherence_protocol)
File containing metadata for other files in a group
An HTML5 cache manifest has to be served with its content type set to "text/cache-manifest". Major web browsers removed support for the cache manifest
Manifest_file
Computer manufacturing company in the US
of cache snooping and invalidation), coupled with the ability to lock processes into register sets and later, the ability to partition the caches, gave
Elxsi
Cache coherence protocol
cache or has been invalidated by a bus request, and must be fetched from memory or another cache if the block is to be stored in this cache. These coherency
MSI_protocol
Rules that guarantee predictable computer memory operation
updated, the server forwards invalidation to all caches. In the second approach, an update is propagated. Most caching systems apply these two approaches
Consistency_model
Processor microarchitecture
2 to avoid issues, and admits that, "in rare instances, improper TLB invalidation may result in unpredictable system behavior, such as hangs or incorrect
Intel Core (microarchitecture)
Intel_Core_(microarchitecture)
Local computer bus for attaching hardware devices
in the cache, the cache would only have to invalidate its copy and would assert SDONE as soon as this was established. However, if the cache contained
Peripheral Component Interconnect
Peripheral_Component_Interconnect
Instruction pipeline
are invalidated. When the cache has been filled with the necessary data, the instruction that caused the cache miss restarts. To expedite data cache miss
Classic_RISC_pipeline
Router architecture
a cache miss might cause an update to the fast hardware cache or the fast cache in main memory. In some designs, it was most efficient to invalidate the
Data_plane
Cache of database connections
In software engineering, a connection pool is a cache of reusable database connections managed by the client or middleware. It reduces the overhead of
Connection_pool
Open standard processor interconnection for data centers
block input/output protocol (CXL.io) and new cache-coherent protocols for accessing system memory (CXL.cache) and device memory (CXL.mem). The serial communication
Compute_Express_Link
Computer architecture treating code and data similarly, though not usually identically
of issues such as cache coherency, if the store doesn't modify or invalidate a cached copy of the instruction in an instruction cache. Another change preserves
Modified_Harvard_architecture
Algorithm for virtual memory implementation
system caches, requiring the page replacement algorithm to select a page from among the pages of both user program virtual address spaces and cached files
Page_replacement_algorithm
Technologies to make delivery of dynamic websites more efficient
calling it dynamic caching or dynamic cache control. It gives them more options to invalidate and bypass the cache over the standard HTTP cache control. The
Dynamic_site_acceleration
Order of accesses to computer memory by a CPU
but use stale data which it has already cached and not yet invalidated. Allowing this relaxation makes cache hardware simpler and faster but leads to
Memory_ordering
High-speed internal memory for storage
discarding it after use ('Data Cache Block: Invalidate', signaling that main memory didn't receive any updated data) the cache is made to behave as a scratchpad
Scratchpad_memory
Type of Spinlock
Additionally, the amount of invalidation is significantly less than ticket-based lock implementations since only one processor incurs a cache miss on a lock release
Array_Based_Queuing_Locks
Line of PowerPC-based computers
have a L1 cache of 32 kB. The ANS 700/200 features the more advanced PowerPC 604e clocked at 200 MHz, with an L1 cache of 64 kB. The L2 cache of the ANS
Apple_Network_Server
Hash collision resolution technique
that linear probing has the best cache performance but is most sensitive to clustering, while double hashing has poor cache performance but exhibits virtually
Open_addressing
List of x86 microprocessor instructions
extension – this will not invalidate the cache. The INVD and WBINVD instructions will invalidate all cache lines in the CPU's L1 caches. It is implementation-defined
List_of_x86_instructions
Cache coherence protocol
The MOSI protocol is an extension of the basic MSI cache coherency protocol. It adds the Owned state, which indicates that the current processor owns
MOSI_protocol
cause a special SMM VM exit. The invalidation types available for the reg argument of INVEPT are: The invalidation types available for the reg argument
List of x86 virtualization instructions
List_of_x86_virtualization_instructions
Topics referred to by the same term
slogan for the cross-platform benefits of C Write-once (cache coherency), a write-invalidate protocol in computer memory design Write once read many,
Write_once
RAM used to emulate secondary storage
offer an advantage to store frequently changing data, like temporary or cached information. The performance of a RAM drive is generally orders of magnitude
RAM_drive
These caches can invalidate the block to avoid the cost of updating. But there is a penalty of p bus cycles for invalidating a block from a cache that
Ski_rental_problem
Free online crowdsourced encyclopedia
To increase speed further, rendered pages are cached in a distributed memory cache until invalidated, allowing page rendering to be skipped entirely
Wikipedia
Component of a computer process
due to issues such as cache flushing (in particular, process switching changes virtual memory addressing, causing invalidation and thus flushing of an
Thread_(computing)
Secretive colony founded by Germans in Chile, formerly torture center
watchtower and searchlights, and was later reported to contain secret weapon caches. External investigations, including efforts by the Chilean government, uncovered
Colonia_Dignidad
Data structure
due to frequent invalidations of cached data in buffer caches by LSM-tree compaction operations. To re-enable effective buffer caching for fast data accesses
Log-structured_merge-tree
American research center, 1985–1995
protocol like МESI relies on remote invalidation of cache lines, a compiler-assisted protocol performs a local self-invalidation as directed by a compiler.. CSRD
University of Illinois Center for Supercomputing Research and Development
University_of_Illinois_Center_for_Supercomputing_Research_and_Development
Type of computer memory
A modern microprocessor with a cache will generally access memory in units of cache lines. To transfer a 64-byte cache line requires eight consecutive
Synchronous dynamic random-access memory
Synchronous_dynamic_random-access_memory
addition to cache state, a directory must track which processors have data when in the shared state. This is required for sending invalidation and intervention
Directory-based_coherence
Computer memory management methodology
called caches and the allocator only has to keep track of a list of free cache slots. Constructing an object will use any one of the free cache slots and
Memory_management
Soviet-American computer scientist
server arrangement Method and apparatus for performing cache segment flush and cache segment invalidation operations Method and system for efficient handlings
Vladimir_Pentkovski
for data in the cache L1, then L2, then in the memory. When the data is not where the processor is looking for, it is called a cache-miss. Below, pictures
Computer security compromised by hardware failure
Computer_security_compromised_by_hardware_failure
Digital circuit
instructions in the L2 cache. The parity design is sufficient, since any instruction suffering a parity error can be invalidated and refetched from memory
Branch_predictor
Network communication protocol for providing shared access to resources
OpLock" from the server. A Level 2 OpLock allows the caching of read requests but excludes write caching. Filter OpLocks Added in Windows NT 4.0, Filter Oplocks
Server_Message_Block
Simultaneous processing in the Java language
Before a synchronized block begins, the monitor is acquired, invalidating the local processor cache so that variables are reloaded from main memory. All writes
Java_concurrency
File system used on Amiga computers
Workbench 1.3 involved some ugly unsupported hacks. Similarly, "Directory Cache" variants were not bootable or supported until Kickstart 3.0. The various
Amiga_Fast_File_System
64-bit extension of the ARM architecture
In October 2025, ARMv9.7-A was announced, including: Targeted memory invalidation broadcasts Flexible resource management (MPAMv2) 6-bit data types for
AArch64
American company
that were not their own. A Wyze spokesperson said this was due to a web caching issue. In February 2024, about 13,000 Wyze home security customers were
Wyze_Labs
Set of rules describing computer system
Also, messages that the processor should emit so that external caches can be invalidated (emptied). Pin architecture functions are more flexible than ISA
Computer_architecture
Official commission in the Russian Federation
Ministry's website mil.ru, but the text is still available via Google's cached HTML version: [1] (as of 8 June 2009). История все стерпит?. Kommersant
Presidential_Commission_to_Counter_Attempts_to_Falsify_History_to_the_Detriment_of_Russia's_Interests
the returning officers. 645 appeals were made against the nomination invalidation to the Election Commission. The election witnessed a significant increase
2026 Bangladeshi general election
2026_Bangladeshi_general_election
Copy protection rootkit by Sony BMG
nameservers cache recently fetched results, and that XCP phones home to a specific hostname. By finding DNS servers that carry that hostname in cache, Kaminsky
Extended_Copy_Protection
Numbers in the Roman numeral system
This is the Coordinated Universal Time (UTC) year in which Wikipedia's cache of this page was last updated, so may be a few hours out of date. Isaac
Roman_numerals
Group of standard library class templates
vectors have low memory usage and good locality of reference and data cache utilization. Unlike other STL containers, such as deques and lists, vectors
Sequence_container_(C++)
American cloud computing company
Edge, apps are deployed to multiple cloud providers. Worldwide caches are invalidated instantly as every global deployment is an atomic and instant update
Netlify
1995 film by David Fincher
money, hundreds of notebooks, and photographs of some of his victims; the cache includes images of Somerset and Mills by a person they believed was an intrusive
Seven_(1995_film)
U.S. state
Caribou-Targhee, Dixie, Fishlake, Manti-La Sal, Sawtooth, and Uinta-Wasatch-Cache), and numerous state parks and monuments. The Moab area, in the southeastern
Utah
Species of bird
It sometimes takes it while briefly hovering. It has not been observed caching food. In winter it commonly forages as part of a mixed-species feeding
Mexican_chickadee
Legislative branch of the state government of Kentucky
their offer to provide a temporary structure to house the legislature and a cache of materials for constructing a permanent edifice, was chosen, and the state's
Kentucky_General_Assembly
Data structure with nodes pointing to the next node
Faster access, such as random access, is not feasible. Arrays have better cache locality compared to linked lists. Linked lists are among the simplest and
Linked_list
Open-source x86 virtualization application
from the original on 2020-06-04. Retrieved 2020-06-04. "Windows 9x TLB Invalidation Bug". 2015-08-10. Archived from the original on 2020-06-04. Retrieved
VirtualBox
American technology company
significantly reduce page load latency by prefetching content, and invalidating cached content in under 150ms. In 2024, Cloudflare announced plans to launch
Cloudflare
System property to handle growing work
than consistency, which is true for many web file-hosting services or web caches (if you want the latest version, wait some seconds for it to propagate)
Scalability
Processor family
Aaron. "Existing workarounds fail with new Windows 11 requirement that invalidates older CPUs — Microsoft's PopCnt restriction appears to be unbreakable"
Intel_Core_2
Application layer protocol for e-mail retrieval and storage
local copies of the messages, but these are considered to be a temporary cache. IMAP was designed by Mark Crispin in 1986 as a remote access mailbox protocol
Internet Message Access Protocol
Internet_Message_Access_Protocol
Programmable machine that processes data
one or more RAM cache memories, which are slower than registers but faster than main memory. Generally computers with this sort of cache are designed to
Computer
1996–2008 Thai television channel
Public TV channel launched, Bangkok Post, January 15, 2008; retrieved from cache 2008-01-25 Thailand replaces programmes on private TV channel Archived 2008-01-19
ITV_(Thailand)
Theological principle
Classics Ethereal Library. p. 12. https://ccel.org/ccel/h/herbermann/cathen06/cache/cathen06.pdf Pawl 0000-0003-3137-3216, Timothy (2022-11-17). "Conciliar
Consensus_Patrum
Cryptanalytic method for unauthorized users to access data
network traffic filtering, deploying decoy credentials, and invalidating authentication caches. In a reverse brute-force attack (also called password spraying)
Brute-force_attack
3D Internet global map program
patent owned by ART+COM and used to challenge Google was completely invalidated after it was shown that another so-called TerraVision, this one at the
Google_Earth
1989). "Leases: An efficient fault-tolerant mechanism for distributed file cache consistency". Proceedings of the twelfth ACM symposium on Operating systems
Lease_(computer_science)
Problems with central processing unit design
pipeline occurs when a branch instruction jumps to a new memory location, invalidating all prior stages in the pipeline. These prior stages are cleared, allowing
Hazard (computer architecture)
Hazard_(computer_architecture)
Database engine built by Microsoft
multi-threading (three threads were used to perform read ahead, write behind, and cache maintenance), implicit transactions (users did not have to instruct the
Access_Database_Engine
American politician (born 1951)
2020. "Thomas Wright adds US Rep. Rob Bishop to his governor ticket". Cache Valley Daily. Associated Press. January 17, 2020. Archived from the original
Rob_Bishop
CPU optimization unit
PIQ instead of the new and altered version of the code in its RAM and/or cache. This behavior of the PIQ can be used to determine if code is being executed
Prefetch_input_queue
CACHE INVALIDATION
CACHE INVALIDATION
Boy/Male
Latin
Son of Vukan.
Surname or Lastname
English (chiefly East Anglia)
English (chiefly East Anglia) : from Anglo-Norman French cachepol (a compound of cache(r) ‘to chase’ + pol ‘fowl’), an occupational name for a bailiff, originally one empowered to seize poultry and other livestock in case of default on debts or taxes.
Boy/Male
Native American
stomach ache.
Boy/Male
Irish
Observant; alert; vigorous.
Surname or Lastname
English
English : variant of Leach 2.English : topographic name from an Old English element læcc, lecc ‘boggy stream’, or a habitational name from a place named with this word, such as Lach Dennis or Lache in Cheshire.
Boy/Male
American, British, English
Lives Near Water
Girl/Female
American, Australian
Storage Place
Boy/Male
Armenian, Australian
Nomadic Cart
Boy/Male
Spanish
Bringer of peace.
CACHE INVALIDATION
CACHE INVALIDATION
Girl/Female
Hindu
Green flowerless plants
Female
English
Pet form of English Jennifer, JENNY means "white and smooth."
Boy/Male
Indian
Full of Nectar; The Drink of the Gods which Grants them Immortality
Girl/Female
Hindu
Goddess Sita (Daughter of king Janak)
Girl/Female
Indian
God
Male
Egyptian
, the king of Chemmis.
Boy/Male
Biblical
Prisoner; fettered.
Boy/Male
German
High.
Surname or Lastname
English
English : variant of Crass.
Girl/Female
Hindu, Indian
Kind Lady
CACHE INVALIDATION
CACHE INVALIDATION
CACHE INVALIDATION
CACHE INVALIDATION
CACHE INVALIDATION
n.
A dog that pursued his prey by scent, as distinguished from the greyhound.
n.
Neglect; negligence; remissness; neglect to do a thing at the proper time; delay to assert a claim.
n.
A hole in the ground, or hiding place, for concealing and preserving provisions which it is inconvenient to carry.
v.
To scratch.
n.
Alt. of Lache
n.
A seal, as of a letter.
n. & v.
See Ache.
v. i.
To suffer pain; to have, or be in, pain, or in continued pain; to be distressed.
n.
A spot, stain, or blemish.
n.
Ache or pain in the ear.
n.
Alt. of Rache
n.
A name given to several species of plants; as, smallage, wild celery, parsley.
p. pr. & vb. n.
of Ache
n.
A stain; a tache.
v. i.
Continued pain, as distinguished from sudden twinges, or spasmodic pain. "Such an ache in my bones."
a.
That aches; continuously painful. See Ache.
n.
Alt. of Ache
n.
Alt. of Viz-cacha
imp. & p. p.
of Ache
n.
Something used for taking hold or holding; a catch; a loop; a button.