[phenixbb] phenix and PAE kernels

Nicholas R. Silvaggi nick at silvaggi.com
Fri Jun 12 12:45:18 PDT 2009

To make things even stranger, I tried running the binary distribution of 
cci_apps on another machine with a PAE kernel and it works!  Here is the 
uname output:

Linux fluffy.bu.edu #1 SMP Mon Mar 23 
23:24:26 EDT 2009 i686 i686 i386 GNU/Linux

Now, phenix fails under this same kernel on *my* machine, but on fluffy 
here it works fine. The only thing I can think of is that the problem is 
due to the hardware differences between the two:

Fluffy has 2 quad core Xeons with DDR2 (I think) and my machine has Core 
i7 with DDR3. I don't know if this bit of detail helps or not, but there 
it is.

I will try recompiling on my core i7 box this evening and let you know 
how it turns out.


Ralf W. Grosse-Kunstleve wrote:
>>> Sorry if this is a naive question, but is there a known bug with
>>> phenix (or python?) on PAE kernels?
> Thanks for the "PAE" clue! This finally sheds some light on the strange
> error you get, which I've seen a few times before.
> In my experience, even compiling from sources (including Python)
> doesn't help. I'm guessing the error will need to be fixed in Python.
> This may not happen quickly.
> Can you reboot your system without PAE?
> Starting with Fedora 11, which just came out this week, 64-bit kernels
> are the default even on 32-bit machines. IMO that's the best way forward.
> (The Fedora 11 system we have has been stable for the few days it is up
> and runs all the phenix tests without problems.)
> Ralf
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