[Mpi3-tools] Comments on 2/22 draft
m.a.hermanns at fz-juelich.de
Tue Feb 23 02:29:30 CST 2010
> - 1.3.5: what's the difference between a VARCLASS_UTILIZATION and a
> VARCLASS_RESOURCE? They both say they're measuring resources in the
> MPI library. One is "absolute", but I don't know what that means.
VARCLASS_UTILIZATION is the ratio of VARCLASS_RESOURCE and whatever the
maximum of that variable is.
Consider a queue for incoming messages with place for 10 messages.
With 2 messages currently being in the queue, you would get
That's how I understand the text, however, I also recommend rephrasing
the text to make it clearer.
> - Why do we need a profiling interface for MPIT? It's already a tool
You could profile your tools, and the MPIT interface. Also, when we open
this to 'the user', which takes the same line as having a Fortran
interface for this, you want time spent here accounted to time spent in
MPI and not in user-code, right?
Juelich Supercomputing Centre
Institute for Advanced Simulation
Forschungszentrum Juelich GmbH
Phone : +49-2461-61-2054
Fax : +49-2461-61-6656
eMail : m.a.hermanns at fz-juelich.de
WWW : http://www.fz-juelich.de/jsc/
JSC is the coordinator of the
John von Neumann Institute for Computing
and member of the
Gauss Centre for Supercomputing
Sitz der Gesellschaft: Juelich
Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498
Vorsitzende des Aufsichtsrats: MinDir'in Baerbel Brumme-Bothe
Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender),
Dr. Ulrich Krafft (stellv. Vorsitzender),
Prof. Dr. Harald Bolt,
Prof. Dr. Sebastian M. Schmidt
More information about the mpiwg-tools