From de335373e44e5abcbfe8453a48cbb438726af3ba Mon Sep 17 00:00:00 2001 From: Erik Schnetter Date: Tue, 7 Dec 2004 16:06:00 +0000 Subject: CarpetWeb: Announce Carpet design walkthrough darcs-hash:20041207160617-891bb-285436c02558b68231e3e3cb2e845c64c5b96626.gz --- Carpet/CarpetWeb/design-walkthrough.html | 127 +++++++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 Carpet/CarpetWeb/design-walkthrough.html (limited to 'Carpet/CarpetWeb/design-walkthrough.html') diff --git a/Carpet/CarpetWeb/design-walkthrough.html b/Carpet/CarpetWeb/design-walkthrough.html new file mode 100644 index 000000000..7741b1bc9 --- /dev/null +++ b/Carpet/CarpetWeb/design-walkthrough.html @@ -0,0 +1,127 @@ + + + + + +Carpet Design Walkthrough + + +

Carpet Design Walkthrough

+ + +

Introduction

+ +

+The AEI numrel group +is hosting a "Carpet Design Walkthrough" +on 13-15.Dec.2004. We plan to start at 3:30pm each day (European time), +and run for roughly 2 hours each day. The meetings will be held at +the + + numrel group offices at Benzstrasse 8/9, Potsdam Babelsberg. +Anyone interested is welcome to attend in person, to listen in by telephone, +or to watch/listen/participate by Access Grid video conferencing. +

+ +

+General discussion about this meeting (including topics to be covered) +should be on the + + developers@lists.carpetcode.org +mailing list +(archives here). +Most questions about organization should be directed to +Jonathan Thornburg <jthorn@aei.mpg-zebra.de> +(remove "-animal"); +questions about the Access Grid should be directed to +Steve White <swhite@aei.mpg-zebra.de> +(again, remove "-animal"). +

+ +

+Our current plan is to start things off with a more general +"Cactus/Carpet Design Overview" on monday, covering design topics +that should be useful to everyone using Carpet. +Then on tuesday && wednesday we will move to more technical +material (likely to be of interest only to people who are programming +either inside the Carpet code itself, or infrastructure thorns that +must closely interoperate with Carpet). +

+ + +

Agenda

+ +

+Here's the current draft agenda: +

Overview of the Carpet (= Berger-Oliger) mesh refinement + & time evolution algorithm
Basic Carpet Terminology +
- terminology for patches, components, grids, + refinement levels, ...
- how grid points are numbered
Overview of relevant parts of Cactus architecture +
- the schedule tree
- the MoL thorn for time evolution
- what's done by the flesh / the driver (Carpet, PUGH, etc) + / MoL / other infrastructure thorns
- how multipatch works (or is supposed to work) in Carpet
More on Cactus Architecture +
- flesh/driver interface
- the GH structure
- how I/O and checkpoint/recover work
- other important flesh data structures
More on Carpet Design +
- interaction with the flesh
- interaction with MoL for time evolution
- interaction with CoordBase (set up grid size/shape/etc) + and SymBase (symmetries and symmetry interpolation)
- strategy for managing the GH
- modes & mode switching
- how grid {functions,arrays} are distributed across processors
A (Very) High-Level Tour of the Carpet Implementation +
- partitioning into CarpetLib/Carpet/CarpetRegrid
- main global data structures which infrastructure + thorns might want (eg current component, level, patch, ...)
- APIs for mode switching and setting the current + component/level/patch/etc
- how Carpet manages interprocessor communication + (and how this could/should be changed to improve + performance scaling)

+ + +

+ +

Go back to the Carpet home page.

+ +

Erik Schnetter

+ +Last modified: Tue Dec 7 17:04:54 CET 2004 + + + + + -- cgit v1.2.3