r15464 - in /1.3/multi: __init__.py test_implementation.py -- March 08, 2012 - 12:21

Author: bugman
Date: Thu Mar  8 12:21:13 2012
New Revision: 15464

URL: http://svn.gna.org/viewcvs/relax?rev=15464&view=rev
Log:
Copied the OpenMPI + Linux 2.6 100% master problem to the API documentation.

The text has also been updated a little.


Modified:
    1.3/multi/__init__.py
    1.3/multi/test_implementation.py

Modified: 1.3/multi/__init__.py
URL: 
http://svn.gna.org/viewcvs/relax/1.3/multi/__init__.py?rev=15464&r1=15463&r2=15464&view=diff
==============================================================================
--- 1.3/multi/__init__.py (original)
+++ 1.3/multi/__init__.py Thu Mar  8 12:21:13 2012
@@ -106,6 +106,16 @@
 =========
 
 See the script 'test_implementation.py' for a basic example of a reference, 
and full, implementation of the multi-processor package.
+
+
+5 Issues
+========
+
+For multi-core systems and Linux 2.6, the following might be required to 
prevent the master processor from taking 100% of one CPU core while waiting 
for the slaves:
+
+# echo "1" > /proc/sys/kernel/sched_compat_yield
+
+This appears to be an OpenMPI problem with late 2.6 Linux kernels.
 """
 
 

Modified: 1.3/multi/test_implementation.py
URL: 
http://svn.gna.org/viewcvs/relax/1.3/multi/test_implementation.py?rev=15464&r1=15463&r2=15464&view=diff
==============================================================================
--- 1.3/multi/test_implementation.py (original)
+++ 1.3/multi/test_implementation.py Thu Mar  8 12:21:13 2012
@@ -27,9 +27,11 @@
 Linux
 -----
 
-For multi-core systems and late 2.6 Linux kernels, the following as root 
might be required to prevent the master processor from taking 100% of one CPU 
core while waiting for the slaves.
+For multi-core systems and Linux 2.6, the following might be required to 
prevent the master processor from taking 100% of one CPU core while waiting 
for the slaves:
 
 # echo "1" > /proc/sys/kernel/sched_compat_yield
+
+This appears to be an OpenMPI problem with late 2.6 Linux kernels.
 """
 
 # Python module imports.