Author: bugman
Date: Thu Mar 8 12:32:00 2012
New Revision: 15465
URL: http://svn.gna.org/viewcvs/relax?rev=15465&view=rev
Log:
Merged revisions 15459-15464 via svnmerge from
svn+ssh://bugman@xxxxxxxxxxx/svn/relax/1.3
........
r15459 | bugman | 2012-03-08 10:44:57 +0100 (Thu, 08 Mar 2012) | 5 lines
Added a reference implementation to the multi-processor package.
This is to demonstrate to users of the package how an implementation is
created.
........
r15460 | bugman | 2012-03-08 11:26:19 +0100 (Thu, 08 Mar 2012) | 5 lines
Documentation improvements to the multi-processor test implementation.
This should make it very easy to see what is happening at all stages.
........
r15461 | bugman | 2012-03-08 12:15:15 +0100 (Thu, 08 Mar 2012) | 3 lines
Added some documentation about master processors on Linux 2.6 eating 100%
of one CPU core.
........
r15462 | bugman | 2012-03-08 12:16:01 +0100 (Thu, 08 Mar 2012) | 3 lines
The profiling print out is now sorted by cumulative time for better
debugging.
........
r15463 | bugman | 2012-03-08 12:18:42 +0100 (Thu, 08 Mar 2012) | 6 lines
Updated the test implementation timing numbers.
This is after using 'echo "1" > /proc/sys/kernel/sched_compat_yield' to fix
the Linux OpenMPI
problem.
........
r15464 | bugman | 2012-03-08 12:21:13 +0100 (Thu, 08 Mar 2012) | 5 lines
Copied the OpenMPI + Linux 2.6 100% master problem to the API documentation.
The text has also been updated a little.
........
Added:
branches/frame_order_testing/multi/test_implementation.py
- copied unchanged from r15464, 1.3/multi/test_implementation.py
Modified:
branches/frame_order_testing/ (props changed)
branches/frame_order_testing/multi/__init__.py
Propchange: branches/frame_order_testing/
------------------------------------------------------------------------------
--- svnmerge-integrated (original)
+++ svnmerge-integrated Thu Mar 8 12:32:00 2012
@@ -1,1 +1,1 @@
-/1.3:1-15457
+/1.3:1-15464
Modified: branches/frame_order_testing/multi/__init__.py
URL:
http://svn.gna.org/viewcvs/relax/branches/frame_order_testing/multi/__init__.py?rev=15465&r1=15464&r2=15465&view=diff
==============================================================================
--- branches/frame_order_testing/multi/__init__.py (original)
+++ branches/frame_order_testing/multi/__init__.py Thu Mar 8 12:32:00 2012
@@ -100,6 +100,22 @@
To execute the calculations, the final part of the calculation code on the
master must feature a call to::
processor_box.processor.run_queue().
+
+
+4 Example
+=========
+
+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.
"""
r15465 - in /branches/frame_order_testing: ./ multi/__init__.py multi/test_implementation.py