From 18b8ac71d8a73267d0b5d53efea579369d31d92a Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Wed, 16 Mar 2011 16:39:16 +0000 Subject: 2011-03-16 Jennifer Averett PR 1743/cpu * user/conf.t: Add Simple Priority Scheduler as complement to existing Deterministic Priority Scheduler. This scheduler serves both as an example and as a lighter weight implementation for smaller systems. --- doc/ChangeLog | 7 +++++++ doc/user/conf.t | 10 ++++++++++ 2 files changed, 17 insertions(+) diff --git a/doc/ChangeLog b/doc/ChangeLog index df18a2d5ce..8be03f71c7 100644 --- a/doc/ChangeLog +++ b/doc/ChangeLog @@ -1,3 +1,10 @@ +2011-03-16 Jennifer Averett + + PR 1743/cpu + * user/conf.t: Add Simple Priority Scheduler as complement to existing + Deterministic Priority Scheduler. This scheduler serves both as an + example and as a lighter weight implementation for smaller systems. + 2011-03-04 Joel Sherrill PR 1752/doc diff --git a/doc/user/conf.t b/doc/user/conf.t index 6db56c6583..2b039c1e4d 100644 --- a/doc/user/conf.t +++ b/doc/user/conf.t @@ -408,6 +408,16 @@ This scheduler requires a variable amount of memory based upon the number of priorities configured in the system. This scheduler may be explicitly selected by defining @code{CONFIGURE_SCHEDULER_PRIORITY}. +@findex CONFIGURE_SCHEDULER_SIMPLE +@item Simple Priority Scheduler - This is an alternative scheduler +in RTEMS. It is designed to provide the same task scheduling behaviour +as the Deterministic Priority Scheduler while being simpler in implementation +and uses less memory for data management. It maintains a single sorted list +of all ready threads. Thus blocking or unblocking a thread is not a +constant time operation with this scheduler. This scheduler is appropriate +for use in small systems where RAM is limited. This scheduler may be explicitly +selected by defining @code{CONFIGURE_SCHEDULER_SIMPLE}. + @end itemize The pluggable scheduler interface was added after the 4.10 release series -- cgit v1.2.3