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- Multithreading typically refers to sharing a single CPU between multiple tasks (or "threads") in a way designed to minimise the time required to switch threads. This is accomplished by sharing as much as possible of the program execution environment between the different threads so that very little state needs to be saved and restored when changing thread. Multiple threads can be executed in parallel on many computer systems. This multithreading generally occurs by time slicing, wherein a single processor switches between different threads--in which case the processing is not literally "simultaneous", for the single processor is only really doing one thing at a time. On a multiprocessor system, threading can be achieved via multiprocessing, wherein different threads can run simultaneously on different processors. www.NetworkDictionary.com
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- The design of the Java language makes multithreading essential for all but the simplest applets. In particular, IO and GUI programming both require multithreading to provide a seamless experience for the user. - IBM
by - On a multi-processor computer, multithreading is implemented with a mixture of time-slicing and genuine concurrency – where different threads run code simultaneously on different CPUs. - O'Reilly Media
by - Multithreading requires careful programming. For most tasks, you can reduce complexity by queuing requests for execution by thread pool threads. - Microsoft Corporation
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- Un hilo de ejecución, en sistemas operativos, es una característica que permite a una aplicación realizar varias tareas a la vez (concurrentemente). Los distintos hilos de ejecución comparten una serie de recursos tales como el espacio de memoria, los archivos abiertos, situación de autenticación, etc. Esta técnica permite simplificar el diseño de una aplicación que debe llevar a cabo distintas funciones simultáneamente. Wikipedia - by Fractaler
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- Las aplicaciones que trabajan con multihilos son aquellas que dividen su carga de trabajo en diversos Hilos o unidades de ejecución. Una razón para esto es la simplificación del diseño. Multi-hilos permite para permitir una fuerte cohesión entre tareas, significando que cada clase de hilo capturará un simple abstracción o idea. Este diseño produce una estrategia llamada divide-and-conquer (dividir y reducir) en lo cual sistemas grandes y complejos son divididos entre más unidades manejables, resultando un sistema con menos costo en la construcción y mantenimiento. La introducción de múltiples hilos también produce beneficios tanto como incrementar concurrencia, mejorar la interacción con el usuario y más eficiencia en el uso de la CPU. - Mega Developers
by Fractaler - Un hilo no puede correr por sí mismo, se ejecuta dentro de un programa. Se pueden programar múltiples hilos de ejecución para que corran simultáneamente en el mismo programa. La utilidad de la programación multihilos resulta evidente. Por ejemplo, un navegador Web puede descargar un archivo de un sitio, y acceder a otro sitio al mismo tiempo. Si el navegador puede realizar simultáneamente dos tareas, no tendrá que esperar hasta que el archivo haya terminado de descargarse para poder navegar a otro sitio. - Página de JAVA de Ramiro Lago
by Fractaler - Related KudoZ question
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- Traitement multitâche qui se traduit par l'exécution simultanée des fils d'un même processus, et qui permet d'accélérer l'exécution d'un programme par l'exploitation à d'autres fins du temps d'attente imposé au processeur lors de l'accès aux données GRand dictionnaire terminologique - by Chantal de Lorme
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- Le noyau de Mac OS X Server offre une capacité de traitement multifil supérieure et des algorithmes d'affinité des processeurs offrant une prise en charge efficace des applications multifils avec la dernière génération de processeurs Intel multicœurs - Site Apple
by Chantal de Lorme - Related KudoZ question
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- http://ru.wikipedia.org/wiki/%D0%9C%D0%BD%D0%BE%D0%B3%D0%BE%D0%BF%D0%BE%D1%82%D0%BE%D1%87%D0%BD%D0%BE%D1%81%D1%82%D1%8C Wikipedia - by Oleg Friedman
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- Приложения Visual Basic могут выполнять несколько задач одновременно, используя многопоточность (или свободное создание потоков), когда каждая задача выполняется в отдельном потоке. Многопоточность улучшает производительность и оперативность приложения. - http://msdn.microsoft.com
by Oleg Friedman - Related KudoZ question
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- Multithreading
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Der Begriff Multithreading (auch Mehrfädigkeit) bezeichnet das gleichzeitige Abarbeiten mehrerer Threads (das sind Ausführungsstränge innerhalb eines einzelnen Prozesses oder eines Tasks).
Software [Bearbeiten]
Meist ist mit dem Begriff das softwareseitige Multithreading gemeint, bei dem in aller Regel nur ein Prozessor beteiligt ist. Die dann vorhandene scheinbare Gleichzeitigkeit wird in Wirklichkeit durch geschickte Programmierung erzeugt. Einzelne Threads eines Prozesses/Tasks können sehr schnell auf zeitkritische Ereignisse reagieren, während andere Threads langwierige Berechnungen durchführen.
Ohne weitere Hardwareunterstützung reduziert das Multithreading die Gesamtsystemleistung durch den bei Threadwechseln entstehenden Overhead. Deshalb wird der Programmierer die Anzahl der Threadwechsel möglichst gering halten.
Bei symmetrischen Multiprozessorsystemen kann die Rechenarbeit eines Prozesses/Tasks durch Multithreading auf mehrere Systemprozessoren verteilt werden.
Hardware [Bearbeiten]
Das hardwareseitige Multithreading unterscheidet sich vom softwareseitigen dadurch, dass die Hardware eines Prozessors das gleichzeitige Abarbeiten mehrerer Threads unterstützt. Die Software muss durch softwareseitiges Multithreading oder mehrerer Prozesse/Tasks diese Fähigkeit ausnutzen.
Da beim hardwareseitigen Multithreading kein Overhead beim Thread-Wechsel entsteht, sondern im Gegenteil durch die Vermeidung von Pipeline-Hazards unproduktive Taktzyklen vermieden werden, kann die Gesamtsystemleistung pro CPU steigen, indem Threadwechsel möglichst häufig vorgenommen werden. Wikipedia - by Uwe Dulz
- Example sentence(s)
- Auffallend sei hingegen, dass der Prozessor nicht für das so genannte Multithreading ausgelegt sei, mit dessen Hilfe ein Kern mehrere Rechenanweisungen auf einmal ausführen kann, was Intel und Sun Microsystems in einigen Chips nutzen. - heise.de
by Uwe Dulz - Related KudoZ question
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- Višenitnost omogućava programeru da unutar svog programa pokrene više niti izvršavanja i time ubrza rad programa. Primjerice, jedna nit može u pozadini obavljati složena preračunavanja, dok druga već prikuplja nove podatke od korisnika. Višenitno izvršavanje programa donosi i veću učinkovitost procesora, jer jedna nit može koristiti njegove resurse u trenucima dok je druga nit besposlena. FER, Zagreb - by Ivan Nekic
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- Višenitnost (višedretvenost, eng. multithreading):
Višenitni program sastoji se od 2 ili više dijelova koji se mogu istovremeno izvršavati (pseudo-paralelizam). Svaki dio takvog programa naziva se nit ili dretva (eng. thread).
Ime dolazi od ‘thread of execution’. Svaki proces ima barem jednu nit.
Primjer: tekst procesor, web server, matrični kalkulator...
Prednost: Bolja iskoristivost procesorskog vremena, posebno kod programa koji imaju sporiji I/O. - Auditorne, FER, Zagreb
by Ivan Nekic - Podržava li Linux višenitnost ili lakše procese?
Uz Unixov model višezadaćnosti koji uključuje teže procese, što je naravno dio standardnog kernela Linuxa, ima nekoliko implementacija lakših procesa ili niti. Noviji kerneli koriste model niti kthreads. - Linux često postavljana pitanja (FAQ)
by Ivan Nekic - Java programi mogu se izvoditi na svakoj arhitekturi na kojoj je implementiran Java virtualni stroj. Implementacija je relativno jednostavna ukoliko ciljna platforma zadovoljava neke osnovne preduvjete, kao što je npr. podrška za višenitni rad (multithreading).
[...]
U Java platformi višenitnost je sadržana u definiciji jezika, dok se u jeziku C / C++ višeprocesni rad i višenitnost ostvaruju preko sistemskih poziva operacijskog sustava (npr. UNIX fork – exec mehanizam). Java također uključuje definicije sinkronizacijskih primitiva. Nadalje, sistemske biblioteke napisane su tako da budu “thread safe”, tj. omogućuju paralelno izvođenje funkcija (metoda!) u različitim nitima. - Programski jezici, ETF, Osijek
by Ivan Nekic - Related KudoZ question
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