[petsc-dev] Issue with -log_view
Jose E. Roman
jroman at dsic.upv.es
Tue May 9 06:17:26 CDT 2023
Hi.
We are seeing a strange thing in the -log_view output with one of the SLEPc solvers. It is probably an issue with SLEPc, but we don't know how to debug it.
It can be reproduced for instance with
$ ./ex45 -m 15 -n 20 -p 21 -svd_nsv 4 -svd_ncv 9 -log_view
The log_view events are listed at the end of this email. The first one (PetscBarrier) is wrong, because PetscBarrier is never called, if I place a breakpoint in PetscBarrier() it will never be hit. Also, in that event it reports some nonzero Mflop/s, which suggests that it corresponds to another event (not PetscBarrier). Furthermore, the count of the PetscBarrier event always matches the count of MatMultTranspose, so there must be a connection.
Does anyone have suggestions how to address this?
Note: this is with 1 MPI process.
Note: the solver creates a shell matrix with MATOP_MULT_TRANSPOSE.
Thanks.
Jose
PetscBarrier 16 1.0 7.5579e-04 1.0 4.38e+03 1.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 6
MatMult 82 1.0 6.1590e-01 1.0 9.25e+05 1.0 0.0e+00 0.0e+00 0.0e+00 81 97 0 0 0 81 97 0 0 0 2
MatMultTranspose 16 1.0 7.4625e-04 1.0 4.38e+03 1.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 6
MatAssemblyBegin 4 1.0 5.2452e-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
MatAssemblyEnd 4 1.0 2.8920e-04 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
MatTranspose 2 1.0 1.6265e-03 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
SVDSetUp 1 1.0 1.8686e-02 1.0 2.72e+02 1.0 0.0e+00 0.0e+00 0.0e+00 2 0 0 0 0 2 0 0 0 0 0
SVDSolve 1 1.0 5.5965e-01 1.0 7.95e+05 1.0 0.0e+00 0.0e+00 0.0e+00 74 83 0 0 0 74 83 0 0 0 1
EPSSetUp 1 1.0 9.5146e-03 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 1 0 0 0 0 1 0 0 0 0 0
EPSSolve 1 1.0 5.4082e-01 1.0 7.94e+05 1.0 0.0e+00 0.0e+00 0.0e+00 71 83 0 0 0 71 83 0 0 0 1
STSetUp 1 1.0 4.8406e-03 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 1 0 0 0 0 1 0 0 0 0 0
STComputeOperatr 1 1.0 1.2653e-03 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
STApply 24 1.0 6.1569e-01 1.0 8.84e+05 1.0 0.0e+00 0.0e+00 0.0e+00 81 92 0 0 0 81 92 0 0 0 1
STMatSolve 24 1.0 6.1556e-01 1.0 8.80e+05 1.0 0.0e+00 0.0e+00 0.0e+00 81 92 0 0 0 81 92 0 0 0 1
KSPSetUp 1 1.0 2.8465e-03 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
KSPSolve 24 1.0 6.1551e-01 1.0 8.80e+05 1.0 0.0e+00 0.0e+00 0.0e+00 81 92 0 0 0 81 92 0 0 0 1
KSPGMRESOrthog 480 1.0 4.3219e-01 1.0 3.98e+05 1.0 0.0e+00 0.0e+00 0.0e+00 57 42 0 0 0 57 42 0 0 0 1
PCSetUp 1 1.0 3.8147e-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
PCApply 504 1.0 2.1615e-02 1.0 1.01e+04 1.0 0.0e+00 0.0e+00 0.0e+00 3 1 0 0 0 3 1 0 0 0 0
BVCopy 27 1.0 3.0560e-03 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
BVMultVec 38 1.0 3.7060e-03 1.0 8.88e+03 1.0 0.0e+00 0.0e+00 0.0e+00 0 1 0 0 0 0 1 0 0 0 2
BVMultInPlace 3 1.0 1.0681e-04 1.0 4.32e+03 1.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 40
BVDotVec 38 1.0 4.5121e-03 1.0 4.38e+04 1.0 0.0e+00 0.0e+00 0.0e+00 1 5 0 0 0 1 5 0 0 0 10
BVOrthogonalizeV 20 1.0 1.3182e-02 1.0 5.33e+04 1.0 0.0e+00 0.0e+00 0.0e+00 2 6 0 0 0 2 6 0 0 0 4
BVScale 24 1.0 4.8089e-04 1.0 4.80e+02 1.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 1
BVNormVec 4 1.0 5.4097e-04 1.0 3.67e+03 1.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 7
BVNormalize 1 1.0 1.3154e-03 1.0 3.75e+03 1.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 3
BVSetRandom 1 1.0 9.1791e-05 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
BVMatMultVec 19 1.0 4.6828e-01 1.0 6.99e+05 1.0 0.0e+00 0.0e+00 0.0e+00 62 73 0 0 0 62 73 0 0 0 1
DSSolve 3 1.0 8.8906e-04 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
DSVectors 7 1.0 2.8920e-04 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
DSOther 12 1.0 3.8576e-04 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
VecDot 4 1.0 8.7500e-05 1.0 1.56e+02 1.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 2
VecMDot 488 1.0 6.0463e-04 1.0 1.98e+05 1.0 0.0e+00 0.0e+00 0.0e+00 0 21 0 0 0 0 21 0 0 0 327
VecNorm 520 1.0 1.0412e-02 1.0 2.02e+04 1.0 0.0e+00 0.0e+00 0.0e+00 1 2 0 0 0 1 2 0 0 0 2
VecScale 514 1.0 1.0245e-02 1.0 1.03e+04 1.0 0.0e+00 0.0e+00 0.0e+00 1 1 0 0 0 1 1 0 0 0 1
VecCopy 62 1.0 1.8365e-03 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
VecSet 64 1.0 4.2200e-05 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
VecAXPY 32 1.0 4.8995e-04 1.0 1.44e+03 1.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 3
VecMAXPY 504 1.0 6.9070e-04 1.0 2.21e+05 1.0 0.0e+00 0.0e+00 0.0e+00 0 23 0 0 0 0 23 0 0 0 320
VecPointwiseMult 504 1.0 3.3593e-04 1.0 1.01e+04 1.0 0.0e+00 0.0e+00 0.0e+00 0 1 0 0 0 0 1 0 0 0 30
VecSetRandom 1 1.0 5.0068e-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
VecNormalize 512 1.0 4.1106e-02 1.0 3.01e+04 1.0 0.0e+00 0.0e+00 0.0e+00 5 3 0 0 0 5 3 0 0 0 1
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