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<== Date ==> <== Thread ==>

Subject: Re: base max thread priority
From: Marty Kraimer <mrk@aps.anl.gov>
To: Jeff Hill <johill@lanl.gov>
Cc: 'Till Straumann' <strauman@SLAC.Stanford.EDU>, 'Eric Norum' <eric.norum@usask.ca>, "'Johnson, Andrew N.'" <anj@aps.anl.gov>
Date: Wed, 27 Nov 2002 06:36:38 -0600
This is a comment about vxWorks and a question about RTEMS.

On vxWorks the following is done:

/* Just map osi 0 to 99 into vx 100 to 199 */
/* remember that for vxWorks lower number means higher priority */
/* vx = 100 + (99 -osi)  = 199 - osi*/
/* osi =  199 - vx */


Since the network tasks, etc all have vxWorks priorities < 100 there is no chance an epics thread can be created with a priortity > important vxWorks threads.

What is the range of priorities for RTEMS?

Comment. It seem to me that a system with severe real time requirements should not use BSD style networking. But I guess that the key to implementing severe real time systems is to carefully decide what it must do and don't let it do anything else.

Marty


Replies:
Re: base max thread priority Eric Norum
References:
RE: base max thread priority Jeff Hill

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