Hello Barry, Thanks for offering to look at this.
I configured a different version that does not have the debugger and the results are a lot faster but the efficiency is still similar. Below you'll see the results. n Tp Efficiency ------------------------------------- 1 162 1 2 110 0.74 4 47 0.86 8 24 0.84 16 12 0.84 32 6 0.84 I'm also including the output of the log_summary for n =1 and 2. As I said before, this is an SMP machine so I would expect it to be better than the typical cluster. That being said I am still learning how this works. I am very happy that I managed to get some encouraging results in a day. Cheers, Francis On 2012-02-24, at 9:08 PM, Jed Brown wrote: > On Fri, Feb 24, 2012 at 14:43, Francis Poulin <fpoulin at uwaterloo.ca> wrote: > It seems to scale beautifully starting at 2 but there is a big drop from 1 to > 2. I suspect there's a very good reason for this, I just don't know what. > > Can you send the full output? The smoother is slightly different, so the > number of iterations could be different by 1 (for example). The -log_summary > part of the output will show us where the time is being spent, so we'll be > able to say what did not scale well between 1 and 2 procs. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120224/97b22c8a/attachment-0003.htm> -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: output_n1.txt URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120224/97b22c8a/attachment-0002.txt> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120224/97b22c8a/attachment-0004.htm> -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: output_n2.txt URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120224/97b22c8a/attachment-0003.txt> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120224/97b22c8a/attachment-0005.htm>
