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The dispatch framework declares several data types and functions to create and manipulate them: Dispatch Queues are objects that maintain a queue of tasks, either anonymous code blocks or functions, and execute these tasks in their turn. The library automatically creates several queues with different priority levels that execute several tasks ...
While GLib has built-in support for file descriptor and child termination events, it is possible to add an event source for any event that can be handled in a prepare-check-dispatch model. [2] Application libraries that are built on the GLib event loop include GStreamer and the asynchronous I/O methods of GnomeVFS , but GTK remains the most ...
This problem has been the subject of much research. The consensus appears to be that the tail drop algorithm is the leading cause of the problem, and other queue size management algorithms such as random early detection (RED) and Weighted RED will reduce the likelihood of global synchronization, as well as keeping queue sizes down in the face of heavy load and unexpected peak traffic.
A strict message loop is not the only option. Code elsewhere in the program can also accept and dispatch messages. PeekMessage is a non-blocking call that returns immediately, with a message if any are waiting, or no message if none is waiting. WaitMessage allows a thread to sleep until a message is in the queue.
Using a thread pool may be useful even putting aside thread startup time. There are implementations of thread pools that make it trivial to queue up work, control concurrency and sync threads at a higher level than can be done easily when manually managing threads. [4] [5] In these cases the performance benefits of use may be secondary.
Each processor has a separate DPC queue. DPCs have three priority levels: low, medium, and high. By default, all DPCs are set to medium priority. When Windows drops to an IRQL of Dispatch/DPC level, it checks the DPC queue for any pending DPCs and executes them until the queue is empty or some other interrupt with a higher IRQL occurs.
If one core completes its work while other cores still have a significant amount of work in their queue, oneTBB reassigns some of the work from one of the busy cores to the idle core. This dynamic capability decouples the programmer from the machine, allowing applications written using the library to scale to utilize the available processing ...
In computer science, message passing is a technique for invoking behavior (i.e., running a program) on a computer.The invoking program sends a message to a process (which may be an actor or object) and relies on that process and its supporting infrastructure to then select and run some appropriate code.