[Carpet] Carpet Status (2004-12-13)

[Erik Schnetter]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Carpet status report

Performance monitoring.  Andre Werthmann and Yaakoub Y El Khamra have 
studied mpiP (MPICH) and XMPI (LAM) to profile Carpet's communication.  
These two tools seem to complement each other; while mpiP gives a 
detailed summary of the communication pattern including source 
locations, XMPI allows the times of each sent and received message to 
be viewed.  Some minor improvements to Carpet have been made.  It 
remains to use these tools to analyse Carpet's communication patterns 
in detail.

HDF5 I/O.  Thomas Radke has implemented recombining the output 
components as they are written to file.  This should reduce the number 
of components that visualisation tools have to deal with.  We also 
reduced the number of attributes that are attached to each dataset, 
which should speed up handling large data files.

Checkpointing.  Thomas Radke has found the cause that prevented 
checkpointing at arbitrary times from working.  Checkpointing and 
restart should now be safe at any iteration.

darcs.  Thomas Radke has written a perl script that automatically sends 
emails about new patches as they are pushed to the main Carpet 
repository.

Teaching.  I will give a "Carpet design walkthrough" this week.  See 
http://www.carpetcode.org/design-walkthrough.html for more information.  
This walkthrough will take place in Potsdam, and we hope to broadcast 
it via the access grid and via VIC and RAT to interested people abroad.

- -erik

- --
Erik Schnetter <schnetter at aei.mpg.de>   http://www.aei.mpg.de/~eschnett/

My email is as private as my paper mail.  I therefore support encrypting
and signing email messages.  Get my PGP key from www.keyserver.net.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQFBvYdhm3uiSwno3f0RAhqiAJ9ocflisohVkySqAkubxxGS0XF5zQCgoCqX
oxvQv7G1+a+Jv4Jf4we1EEo=
=KQ53
-----END PGP SIGNATURE-----