Mark Shephard wrote:
Carl,
Although I would like to put some focus on improving mesh adapt (from multiple levels) and FMDB (low level performance and memory), I do not think it is going to happen in the near future since the SCOREC group needs to keep focused on parallel and meeting the needs of applications groups we are working with. (By the way your figure 6 showing where the time is spent is quite interesting and gives great information on where things need improvement - Ting and others, please note that figure and table XVI.)
I've also got a callgrind profile that I'd be happy to send along now or in the future. It's entirely possible that there are some places where a small change could make a huge difference in performance, if one looked in the right place.
Therefore I am not comfortable including the memory and cpu comparisons. In addition to known inefficiencies, we may be comparing apples and oranges in some aspects. The mesh adapt procedures tend to include substantial logic checks and decision processes not used in lots of codes. My guess is that the only fair comparison is the the Native and GRUMMP comparison.
I was leaning towards taking this out, but left it in primarily out of inertia. I'm happy to pull the performance comparisons. That said, we shouldn't abandon the notion of doing more complete performance comparisons at some point in the future. Someone (Martin maybe?) floated the notion of having a set of performance kernels to complement the compliance test suite. I think that's a good idea, for two reasons: first, it'll help all of us tune up our implementations, and second, it'll give a realistic (?) assessment of the tradeoffs that come with the different design decisions that have gone into the different mesh databases. Once we have the data internally, we can then decide what to do about releasing it. Carl -- ------------------------------------------------------------------------ Dr. Carl Ollivier-Gooch, P.Eng. Voice: +1-604-822-1854 Associate Professor Fax: +1-604-822-2403 Department of Mechanical Engineering email: [email protected] University of British Columbia http://www.mech.ubc.ca/~cfog Vancouver, BC V6T 1Z4 http://tetra.mech.ubc.ca/ANSLab/ ------------------------------------------------------------------------