FunctionPackage: mpToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 10.1
Unrevised from 10.0 to 10.1.
10.0 version

start-scheduler

Arguments: nil

Multiprocessing is not automatically started in the default Allegro CL environment.

This function starts multiprocessing, which is also started automatically the first time a process is started by process-reset, directly or indirectly (as by process-run-function). There is in fact no scheduler process. In a virtual thread Lisp, runnable processes are queued by priority and run (for a quantum of time) according to the queue. In os-thread and SMP Lisps, the OS decides what processes to run. The name start-scheduler dates from earlier releases where there was an actual scheduler process.

Even in an SMP Lisp, it is possible to start Lisp without the multiprocessing module loaded. A call to start-scheduler ensures the mp module is loaded. (Other functionality has the same effect, but calling start-scheduler guarantees things.) Also, if you use immigrant threads in a non-SMP Lisp, you might want to call start-scheduler to be sure the system is initialized properly for the immigrant threads.

See multiprocessing.htm for general information on multiprocessing in Allegro CL.


Copyright (c) 1998-2022, Franz Inc. Lafayette, CA., USA. All rights reserved.
This page was not revised from the 10.0 page.
Created 2019.8.20.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 10.1
Unrevised from 10.0 to 10.1.
10.0 version