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See all on WikipediaSpinlock - Wikipedia
In software engineering, a spinlock is a lock that causes a thread trying to acquire it to simply wait in a loop ("spin") while repeatedly checking whether the lock is available. Since the thread remains active but is not performing a useful task, the use of such a lock is a kind of busy waiting. Once acquired, spinlocks … See more
The simple implementation above works on all CPUs using the x86 architecture. However, a number of performance optimizations are … See more
Intel 80386 compatible processorA spinlock implementation in x86 assembly language is given as an examplelater implementations of the x86 architectureSome optimizations for spinlock are possible, such as using an unlocked MOV instead of XCHGsome Cyrix processors, some revisions of the Intel Pentium Pro (due to bugs), and earlier Pentium and i486 SMP systemsSome processors that do not support the unlocked MOV optimization for spinlock are listed as exceptionsHyper-Threading CPUsAnother optimization for spinlock is to use the rep nop instruction to pause the spinning thread and allow the other thread to workTransactional Synchronization Extensions and other hardware transactional memory instruction setsA new technology that can replace locks in most cases and greatly improve performance by handling atomic operations in hardware is introducedHardware Lock Elision (HLE) in x86A weakened but backwards-compatible version of hardware transactional memory that can be used for locking without losing compatibility is mentionedSolaris, Mac OS X and FreeBSDSome operating systems that use a hybrid approach called adaptive mutex to avoid spinning when the thread holding the lock is not running are namedOpenBSDAn operating system that attempted to replace spinlocks with ticket locks but resulted in worse performance and slower applications is mentioned• pthread_spin_lock documentation from The Open Group Base Specifications Issue 6, IEEE Std 1003.1, 2004 Edition
• Variety of spinlock Implementations from Concurrency Kit See moreWikipedia text under CC-BY-SA license spinlock - What exactly are "spin-locks"? - Stack Overflow
WEBSpinlock, is a type of lock, which is non-block able & non-sleep-able. Any thread which want to acquire a spinlock for any shared or critical resource will continuously spin, wasting …
Spinlock - OSDev Wiki
WEBA spinlock is a type of reentrancy lock, where the CPU repeatedly attempts to acquire the lock until it succeeds (or, the CPU "spins" until it succeeds). A lock is "uncontended" if …
What is Spinlock in Operating System? - GeeksforGeeks
WEBSpinlock is a synchronization mechanism used in operating systems to protect shared resources from single access by multiple threads or processes. Unlike other …
Spin lock - Wikipedia
WEBSpin lock may refer to: Spin lock, a part of artillery fuze mechanism which arms the munition upon firing. Spinlock, a concept in multithread programming. Category: Disambiguation …
locks - How is spinlock different from polling? - Software …
WEBYou use a spinlock if you expect that a resource will only be locked for a very short time - for example if a lock is only used to update a variable. The spinlock polls the lock at …
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Dumbbell - Wikipedia
WEBWeight plates are slid onto the outer portions of the dumbbell and secured with clips or collars. Shown to the right is a "spinlock" dumbbell, whose ends are threaded to accept …
A Close Look at a Spinlock – Embedded in Academia
WEBThe spinlock is the most basic mutual exclusion primitive provided by a multiprocessor operating system. Spinlocks need to protect against preemption on the current CPU …
what is the difference between spin locks and semaphores?
WEBSpinlock vs other kind of lock is a matter of implementation: a spinlock keeps trying to acquire the lock, whereas other kinds wait for a notification. In a Linux kernel context, the …
SpinLock - .NET | Microsoft Learn
WEBSpinLock. The SpinLock structure is a low-level, mutual-exclusion synchronization primitive that spins while it waits to acquire a lock. On multicore computers, when wait …
Spinlocks – CS 161 | Harvard University
WEBA spinlock is a simple synchronization object providing mutual exclusion. A spinlock has two operations, lock and unlock . Only one core can have the lock at a time.
What is a spinlock in Linux? - Unix & Linux Stack Exchange
WEBA spinlock is a lock that operates by disabling scheduler and possibly interrupts (irqsave variant) on that particular core that the lock is acquired on. It is different from a mutex in …
What is the Difference Between Spinlock and Mutex
WEBSpinlock is a lock which causes a thread trying to acquire it to simply wait in the loop and repeatedly check for its availability. In contrast, a mutex is a program object that is …
Spinlock SRL - Wikipedia
WEBSpinlock is a technology based company specialized in the manufacture and development of nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) …
スピンロック - Wikipedia
WEBスピンロック（英: spin lock, spinlock ） とは、計算機科学におけるロックの一種で、スレッドがロックを獲得できるまで単純にループ（スピン）して定期的にロックをチェッ …
Spinlock - Wikipedia, the free encyclopedia
WEBIn software engineering, a spinlock is a lock where the thread simply waits in a loop ("spins") repeatedly checking until the lock becomes available. As the thread remains active but …
Spin Locks Considered Harmful, and How to Write Them When …
WEBA spin lock is appropriate if the expectation is for very few iterations or it is really important to try to fool the processor into not going into a sleep state. This is the sort of code we …
Lock (computer science) - Wikipedia
WEBIn computer science, a lock or mutex (from mutual exclusion) is a synchronization primitive that prevents state from being modified or accessed by multiple threads of execution at …
multithreading - Is a spinlock lock free? - Stack Overflow
WEBdefinition of lock-free on wiki: A non-blocking algorithm is lock-free if there is guaranteed system-wide progress. definition of non-blocking: an algorithm is called non-blocking if …
spinlock - Wiktionary, the free dictionary
WEBspinlock (plural spinlocks) (programming) A lock which causes a thread trying to acquire it simply to wait in a loop ("spin") while repeatedly checking if the lock is available.
Busy waiting - Wikipedia
WEBIn computer science and software engineering, busy-waiting, busy-looping or spinning is a technique in which a process repeatedly checks to see if a condition is true, such as …
How spinlocked threads avoid overhead of context switching?
WEBIn wikipedia, the aritcle about spinlocks. Because they avoid overhead from operating system process rescheduling or context switching, spinlocks are efficient if threads are …
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