Network scheduler for realtime applications

G - Physics – 06 – F

Patent

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Details

G06F 9/48 (2006.01) G06F 9/46 (2006.01) H04L 29/06 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2371614

A network scheduler for real time applications is described. The network scheduler supports scheduling of network packets in a multi-threaded operating system to insure correct scheduling order and to preclude kernel preemption of active threads. The network scheduler resides between a kernel (and device drivers) and multiple sessions at the user-level. The network scheduler uses input/output control primitives such as HOLD and RELEASE to control servicing of the queues of packets at the kernel or network device driver. The control primitives serve as a middleware interface to the underlying kernel or network device driver. The network scheduler functions as a proxy scheduler to manage the queues of packets at the kernel or network device driver.

L'invention concerne un ordonnancer réseau destiné aux applications en temps réel. L'ordonnanceur réseau prend en charge l'ordonnancement des paquets en réseau dans un système d'exploitation multifilières afin d'assurer une séquence correcte de l'ordonnancement et d'empêcher la préemption du noyau sur les filières actives. L'ordonnanceur réseau réside entre le noyau (et les pilotes des périphériques) et les sessions multiples au niveau de l'utilisateur. Il utilise des primitives de commande d'entrées/sorties telles que HOLD et RELEASE pour contrôler le service des files d'attente au niveau du noyau ou d'un pilote de périphérique réseau. L'ordonnanceur réseau fonctionne comme un ordonnanceur de mandataires pour gérer les files d'attente de paquets au niveau du noyau ou d'un pilote de périphérique réseau.

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