Newsgroups: comp.parallel.mpi From: James Cownie Subject: Re: MPI and Financial Modelling Organization: Dolphin Interconnect Solutions Date: Fri, 26 Jun 1998 09:20:35 +0100 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <359359D3.92E98837@dolphinics.com> Paul Bristow wrote: > : 6) How is debugging done in a parallel environment? > With difficulty! There are two parallel debuggers, TotalView from > Dolphonics ( I think that's the company's name) TotalView is written by Dolphin Interconnect Solutions, our web page is at http://www.dolphinics.com/toolworks . The current releases support MPICH on all the platforms that both it an TotalView run on, and Digital MPI on Alphas/Digital Unix. Support for SGI's MPI and IBM's MPI is in the beta release of TotalView which is going to testing later this month. As well as all the obvious things for parallel codes (acquire them all, run them all together, stop them all when bpts are hit, etc), we also have explicit support for MPI to allow you to see the pending messages and send/receive operations in each communicator. Since you can attach to a deadlocked code this is great for finding what went wrong. TotalView 3.8 (the one just going to beta) also has the ability to let you see the value of a variable in all processes in a single window. (You can update too). Slightly off topic for this group is that we also support PGI's HPF... Free eval copies (and full manuals in PS or PDF) are available at our web site. -- Jim James Cownie Dolphin Interconnect Solutions +44 117 9071438 http://www.dolphinics.com/toolworks