r22397 - /trunk/docs/latex/dispersion.tex -- March 03, 2014 - 14:51

Author: bugman
Date: Mon Mar  3 14:51:08 2014
New Revision: 22397

URL: http://svn.gna.org/viewcvs/relax?rev=22397&view=rev
Log:
Added a section at the start of the dispersion GUI analysis tutorial about 
'computation time'.

This is for the dispersion chapter of the manual.


Modified:
    trunk/docs/latex/dispersion.tex

Modified: trunk/docs/latex/dispersion.tex
URL: 
http://svn.gna.org/viewcvs/relax/trunk/docs/latex/dispersion.tex?rev=22397&r1=22396&r2=22397&view=diff
==============================================================================
--- trunk/docs/latex/dispersion.tex     (original)
+++ trunk/docs/latex/dispersion.tex     Mon Mar  3 14:51:08 2014
@@ -2614,7 +2614,7 @@
   \item The second analysis will consists of clustering spins with similar 
kinetics and thermodynamics parameters (exchange rates and populations 
respectively) and optimising these clusters using a common set of exchange 
parameters.
 \end{itemize}
 
-In this example, Gary Thompson's multiprocessor framework (see 
section~\ref{sect: Relaxation dispersion using OpenMPI} on 
page~\pageref{sect: Relaxation dispersion using OpenMPI}) will be used with 
OpenMPI on a single four-core, hyper-threaded computer with the command:
+In this example, Gary Thompson's multiprocessor framework (see 
section~\ref{sect: Relaxation dispersion using OpenMPI} on 
page~\pageref{sect: Relaxation dispersion using OpenMPI}) will be used with 
OpenMPI\index{MPI!OpenMPI} on a single four-core, hyper-threaded computer 
with the command:
 
 \example{\$ mpirun -np 8 /data/relax/relax-trunk/relax --multi='mpi4py' 
--log $\sim$/tmp/dispersion/log\_non\_clustered --gui}
 
@@ -2622,6 +2622,14 @@
 If running on a system where your home directory is not defined as 
\directory{$\sim$\ossep{}}, MS Windows for example, the \directory{$\sim$} 
part will need to be replaced with some other directory.
 A different command will be used for the clustered analysis to store the log 
messages in a separate file.
 The two logs will be used to compare the two analysis types at the end.
+
+
+% Computation time.
+\subsection{Dispersion GUI mode -- computation time}
+
+The time required to complete these two analyses is highly dependent on the 
computer being used as well as how many nodes can be used for running the 
calculations parallelised with OpenMPI\index{MPI!OpenMPI}.
+On a large cluster with many nodes both analyses should be completed in 
under an hour.
+But when running the analyses without OpenMPI\index{MPI!OpenMPI} on old 
single core computer, the analyses could take days and even up to a week.
 
 
 % Initialisation of the data pipe.