Re: [CAD_CAM_EDM_DRO] EMC and freqmod

Terry Toddy wrote:

> Jon Elson wrote:
>
> > Very interesting. Which GUI are you using? If you are using Tk/EMC, try
> > xemc and see if the same problems show up.
>
> I am using xemc.
> I suspect kernel problems because if the system sits idle waiting for a
> login it eventually displays the message "lost jiffies". About every 30
> - 45 minutes it will display the message again.

Hmmm, well I don't know what that is about, maybe you can do a grep
search on the RT patch and look for that message text. or, maybe that
comes from some other area of the kernel. You should check the
hardware compatibility list to make sure every component in your
system is fully supported.

> > I am using RedHat 5.2 (2.0.36-0.7 kernel) with the 0.9J RT patch.
> > But, I am using the 20-Dec-1999 version of EMC, the last one where
> > the Tk/EMC gui worked with total reliability.
>
> This is the same kernel and patch I am using. My system is an AMD K-6
> 300MHz.

After some problems using Cyrix/IBM CPUs, I swore off all non-Intel
chips for Linux systems. I believe there are kernel patches for 2.0.x
kernels to support AMD and Cyrix CPUs better. You might check that.
There is also a floppy-bootable memory test program that may be of
some use in detecting system problems.

>
> >
> > I would also like to see this problem cleaned up. Apparently, if you use the
> > latest kernels with the later EMC versions, it works pretty well, but still will
> > hang up once in a while. I'm staying with the old stuff until this problem
> > is fixed.
>
> I'll try a different GUI. If that doesn't help I'll try the 20-Dec-1999
> version of EMC. If that doesn't fix it then I'll go borrow the BDI cd
> from Tom Eldredge and try that.

Well, if the system gets those jiffies messages without EMC running, then
I don't know whether different EMC versions will be much help.
Do you have an un-patched (non-real time) kernel left? I keep my
stock CDROM kernel around for comparisons. Does that kernel ALSO
show the jiffies message, or have any other problems?

Tom Eldredge? Are you also in Missouri? I'm in the St. Louis area, and
went to UM-Rolla for 2 years (a long time ago).

> If that doesn't fix it I'll just have to cut my parts real quick before
> the system hangs. :-)

That is not a very acceptable solution!

Jon