EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

<20022003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024  Index <20022003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: Re: base max thread priority
From: Marty Kraimer <[email protected]>
To: Jeff Hill <[email protected]>
Cc: 'Till Straumann' <[email protected]>, 'Eric Norum' <[email protected]>, "'Johnson, Andrew N.'" <[email protected]>
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

Navigate by Date:
Prev: Re: base max thread priority Till Straumann
Next: INET address Marty Kraimer
Index: <20022003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Re: base max thread priority Till Straumann
Next: Re: base max thread priority Eric Norum
Index: <20022003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 02 Feb 2012 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·