Re: RTAI in CVS version

[Will Shackleford <shackle-at-cme.nist.gov>]

Charly Brauer wrote:

> Will,
> 
> Why is RTAI being used?  Is it simplier than rtlinux?
> 


RTAI and RTLinux have about the same level of complexity. The 
performance and feature sets are very similar also. There are some tools 
that work with RTAI and don't work with RTLinux such as the Linux Trace 
Tool. There are a few people who have reported problems that are 
difficult to track down but may be related to RTLinux. They might be 
able to test that assumption by running with RTAI instead. RTAI also 
comes with some ( of the embedded linux distributions.

They are similar enough that it looks like it will not be that difficult 
to support both. If anybody finds a really compelling reason to use one 
or the other other than the fact that we have a lot more experience with 
RTLinux please let me know. Otherwise I thought its just nice to know 
you have options.


-- Will





> charly
> 
> At 02:24 PM 6/25/01 -0400, you wrote:
> 
>>
>>I have just checked into CVS a version that should support RTAI
>>(Real-time Application Interface) as an alternative to RTLinux.
>>
>>I built with kernel 2.4.3, rtai 24.1.4, gcc 2.95.2 and libc 2.1.3.
>>Other versions may very well work, but I haven't tried any.
>>
>>
>>to build
>>
>>cd rcslib/src
>>make PLAT=linux_rtai
>>make PLAT=rtai
>>cd ../..
>>
>>cd emc/src
>>make PLAT=linux_rtai
>>make PLAT=rtai
>>
>>linux_rtai is for non-realtime stuff that needs to connect with rtai 
>>code. just "rtai" is for the realtime code for the rtai environment.
>>
>>I also increased the stack size which seemed to solve the problem that 
>>caused frequent reboots under RTAI and I suspect was causing occasional 
>>reboots under RTLinux.
>>
>>
>>-- Will
>>
>>
>>
>>
>>
>>
>>-- 
>>---------------------------------------------------------------
>>William Penn Shackleford III			shackle-at-nist.gov
>>National Institute of Standards & Technology	Tel:	(301) 975-4286
>>100 Bureau Drive Stop 8230  			FAX:	(301) 990-9688
>>Gaithersburg MD  20899  USA
>>http://www.isd.mel.nist.gov/personnel/shackleford/
>>Office Location: Bldg. 220 Rm A253
>>
>>
>>
>>
>>
> 
> 



-- 
---------------------------------------------------------------
William Penn Shackleford III			shackle-at-nist.gov
National Institute of Standards & Technology	Tel:	(301) 975-4286
100 Bureau Drive Stop 8230  			FAX:	(301) 990-9688
Gaithersburg MD  20899  USA
http://www.isd.mel.nist.gov/personnel/shackleford/
Office Location: Bldg. 220 Rm A253