Charm++ parallel programming system

[Abhinav S Bhatele <bhatele AT illinois.edu>]

Hi Haowei,

This is a problem (a serial bottleneck) and parallel I/O is needed to fix this.

Someone will correct me if I am wrong but currently Charm++ does not provide support

to applications for parallel I/O. The application developer has to write his own code for

reading input files in parallel at program startup.

- Abhinav

On Thu, Jul 1, 2010 at 1:33 AM, Haowei Huang <huangh AT in.tum.de> wrote:

Hi Phil:

         I have a question about IO efficiency in Charm++. As shown in your manual, each program has a main chare and all the other chares are created by main chare through entry method. Take MD as an example, main chare reads all data information from input file and creates all patches and distributes data to different patches. In this situation, processor 0 is busy with reading data from file and other processors keep idle. Do you think is it a problem or do you have other asynchronous way to handle it? Thanks a lot.

--
Haowei Huang
Ph.D. student
Technische Universitaet Muenchen
Institut fuer Informatik, I10
Boltzmannstr. 3
D-85748 Garching
Room 01.06.061
Phone: +49 (89) 289 18477
mailto: huangh AT in.tum.de

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Abhinav S Bhatele
My work: http://charm.cs.illinois.edu/~bhatele/phd