Thanks for your help! -----
Dr Pierre Moinier Principal Research Scientist Office ': +44 (0)117 302 8223 > pierre.moinier at baesystems.com | ? www.baesystems.com <http://www.baesystems.com/> BAE Systems ? Advanced Technology Centre ? Sowerby Building (20R) ? FPC 267 ? PO Box 5 ? Filton ? Bristol ? BS34 7QW BAE Systems (Operations) Limited Registered Office: Warwick House, PO Box 87, Farnborough Aerospace Centre, Farnborough, Hants, GU14 6YU, UK Registered in England & Wales No: 1996687 ________________________________ From: petsc-users-bounces at mcs.anl.gov [mailto:[email protected]] On Behalf Of Jed Brown Sent: 29 September 2010 16:04 To: PETSc users list Subject: Re: [petsc-users] Read in sequential, solve in parallel *** WARNING *** This message has originated outside your organisation, either from an external partner or the Global Internet. Keep this in mind if you answer this message. The stage totals are aggregate. More info in the users manual. You can add stages to distinguish between different phases of your program. Your results look good except for the dot/norm timing but that won't make s big difference. Jed On Sep 29, 2010 4:34 PM, "Moinier, Pierre (UK)" <Pierre.Moinier at baesystems.com> wrote: Jed, You are right I built the matrix from a Poisson problem using a 5pts discretization. I have now found out why I wasn't getting the correct scaling. That was due to a silly mistake in submitting my executable. With 4 cores, I get: --- Event Stage 0: Main Stage MatMult 1633 1.0 6.9578e+00 1.2 3.67e+09 1.0 9.8e+03 8.0e+03 0.0e+00 41 43100 59 0 41 43100 59 0 2110 MatAssemblyBegin 1 1.0 1.8351e-01182.2 0.00e+00 0.0 0.0e+00 0.0e+00 2.0e+00 0 0 0 0 0 0 0 0 0 0 0 MatAssemblyEnd 1 1.0 1.6289e-02 1.0 0.00e+00 0.0 1.2e+01 2.0e+03 7.0e+00 0 0 0 0 0 0 0 0 0 0 0 MatLoad 1 1.0 6.6239e-01 1.0 0.00e+00 0.0 2.1e+01 2.3e+06 9.0e+00 4 0 0 36 0 4 0 0 36 0 0 VecDot 3266 1.0 2.3861e+00 1.6 1.63e+09 1.0 0.0e+00 0.0e+00 3.3e+03 11 19 0 0 66 11 19 0 0 66 2737 VecNorm 1634 1.0 3.8494e+00 1.2 8.17e+08 1.0 0.0e+00 0.0e+00 1.6e+03 23 10 0 0 33 23 10 0 0 33 849 VecCopy 1636 1.0 1.0704e+00 1.3 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 5 0 0 0 0 5 0 0 0 0 0 VecSet 1 1.0 6.0201e-04 2.3 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0 VecAXPY 3266 1.0 2.0010e+00 1.2 1.63e+09 1.0 0.0e+00 0.0e+00 0.0e+00 11 19 0 0 0 11 19 0 0 0 3264 VecAYPX 1632 1.0 8.4769e-01 1.4 8.16e+08 1.0 0.0e+00 0.0e+00 0.0e+00 4 10 0 0 0 4 10 0 0 0 3850 VecAssemblyBegin 1 1.0 3.3454e-02477.3 0.00e+00 0.0 0.0e+00 0.0e+00 3.0e+00 0 0 0 0 0 0 0 0 0 0 0 VecAssemblyEnd 1 1.0 3.0994e-06 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0 VecLoad 1 1.0 7.2319e-02 1.0 0.00e+00 0.0 3.0e+00 2.0e+06 4.0e+00 0 0 0 5 0 0 0 0 5 0 0 VecScatterBegin 1633 1.0 2.4417e-02 2.3 0.00e+00 0.0 9.8e+03 8.0e+03 0.0e+00 0 0100 59 0 0 0100 59 0 0 VecScatterEnd 1633 1.0 1.0537e+0024.4 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 3 0 0 0 0 3 0 0 0 0 0 KSPSetup 1 1.0 2.6400e-03 1.3 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0 KSPSolve 1 1.0 1.5425e+01 1.0 8.57e+09 1.0 9.8e+03 8.0e+03 4.9e+03 95100100 59 99 95100100 59100 2222 PCSetUp 1 1.0 0.0000e+00 0.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 ... PCApply 1634 1.0 1.0700e+00 1.3 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 5 0 0 0 0 5 0 0 0 0 0 For a single core, I was getting 4.4828e+01 for KSPSolve. I am correct to assume that what is listed as "Event Stage 0: Main Stage" is common to each core? Finally, what is the meaning of "Event Stage 0: Main Stage" Cheers, -Pierre. ******************************************************************** This email and any attachmen... ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20100929/67e285fc/attachment.htm>
