October 2002
Intermediate to advanced
430 pages
14h 57m
English
Content preview from Embedded Systems Design, 2nd Edition
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232 Embedded systems design
such as invalidating caches to ensure that the new process
or task does not access incorrect information.
A thread has different characteristics:
• It has no additional context information beyond that stored
in the processor register set.
• Its ownership of resources is inherited from its parent task
or process.
With a simple operating system, there is no difference
between the thread context switch and the process level switch. As
a result, these terms almost become interchangeable. With a multi-
user, multitasking operating system, this is not the case. The
process or task is the higher level with the thread(s) the lower level. ...
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