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> Real-time, Real-time
fapplin
 Posted: Nov 6 2012, 04:56 PM
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Hi,

I've just installed Scientific Linux and am fairly new to the Linux world (I've been a mainframe and Windows developer for over 20 years). Can someone point me in the direction of how to set up real-time in Scientific Linux and maybe some programming examples, too?

Thanks,

Frank
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fapplin
 Posted: Nov 6 2012, 07:36 PM
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I wanted to add that I'm running SL 6.3 (Carbon) with
Kernel Linux 2.6.32-279.5.1.el6.i686.
GNOME 2.28.2

Memory: 2.8 GiB
Processor 0: Intel® Core™2 Duo CPU E7200 @2.53 GHz
Processor 1: Intel® Core™2 Duo CPU E7200 @2.53 GHz

I'm wanting to install the realtime kernel because we have psychological experiments that we will be running that we will be synching pulses with a BioSemi EEG system. The pulses will be based on a GreyCode key, mouse click for a subject selection, and when an image appears on the screen.
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hadrons123
 Posted: Nov 7 2012, 02:56 AM
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kb8vsa
 Posted: Jul 1 2015, 04:34 PM
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Cannot get past

yum groupinstall 'MRG Realtime'

Reply is

[root@localhost yum.repos.d]# yum groupinstall 'MRG Realtime'
Loaded plugins: fastestmirror, refresh-packagekit, security
Setting up Group Process
Loading mirror speeds from cached hostfile
epel/metalink | 11 kB 00:00
* elrepo: mirror.symnds.com
* epel: mirror.steadfast.net
* rpmforge: mirror.team-cymru.org
* sl: ftp.scientificlinux.org
* sl-security: ftp.scientificlinux.org
* sl6x: ftp.scientificlinux.org
* sl6x-security: ftp.scientificlinux.org
atrpms | 3.0 kB 00:00
elrepo | 2.9 kB 00:00
rpmforge | 1.9 kB 00:00
sl | 3.6 kB 00:00
sl-livecd-extra | 2.5 kB 00:00
sl-livecd-extra/primary_db | 99 kB 00:00
sl-security | 2.9 kB 00:00
sl6x | 3.6 kB 00:00
sl6x-security | 2.9 kB 00:00
slc6-mrg | 3.1 kB 00:00
Warning: Group MRG Realtime does not exist.
No packages in any requested group available to install or update

Anyone advise ??
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redman
 Posted: Jul 1 2015, 06:03 PM
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First off all, please disable all repos you do not need.
As far as I can see, you enabled them all which is a one-way ticket for disaster.

It seems that SL7 does not offer that group.
Where did you find the info that it should be possible to install it?

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"Sometimes the best helping hand you can give is a good, firm push."
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kb8vsa
 Posted: Jul 1 2015, 07:23 PM
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QUOTE (redman @ Jul 1 2015, 01:03 PM)
First off all, please disable all repos you do not need.
As far as I can see, you enabled them all which is a one-way ticket for disaster.

It seems that SL7 does not offer that group.
Where did you find the info that it should be possible to install it?


Ahh got it ,.... changed it a little to a small repo file named slc5x-mrg-realtime.repo and drop it in /etc/yum.repos.d. The file contains:

[slc-mrg-realtime]
name = SLC5X - MRG Realtime
baseurl = http://linuxsoft.cern.ch/cern/mrg/slc5X/$basearch/RPMS
enabled = 1
protect = 0
gpgkey = http://glitesoft.cern.ch/cern/slc44/x86_64/RPM-GPG-KEYs/RPM-GPG-KEY-cern
gpgcheck = 1


From there, I can simply run yum grouplist and see the MRG component groups:

MRG Realtime
MRG Grid
MRG Management
MRG Messaging
A yum groupinstall "MRG Realtime" && yum install kernel-rt-devel gives me everything I need for realtime operation.

Thanks a bunch
J
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kb8vsa
 Posted: Jul 7 2015, 02:50 PM
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All good .... installed successfully... Trying now to run tuna... to set up and evaluate RT modules.... tuna seems to be running from terminal but can't get the -g (GUI) to run.... keep getting this message...

tuna: machine needs to be authorized via host or ssh -X?

seems like i may have a RH version that will not run without RH membership....

Any thoughts ??

thanks much

J
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