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Searched refs:slow (Results 1 – 19 of 19) sorted by relevance

/petsc/src/tao/leastsquares/tutorials/matlab/
H A DREADME6 18, 27, 28, 36, 47, 50, 51 - slow convergence
/petsc/src/ksp/ksp/tutorials/
H A Dex42-mgschur.opts15 # this will work but is quite slow
/petsc/src/ts/impls/explicit/rk/
H A Drk.h35 …PetscInt slow; /* flag indicates call slow components solver (0) or fast components solver (1)… member
H A Dmrk.c291 if (rk->slow) { in TSEvaluateStep_RK_MultirateSplit()
347 rk->slow = PETSC_FALSE; in TSStepRefine_RK_MultirateSplit()
400 rk->slow = PETSC_TRUE; in TSStep_RK_MultirateSplit()
/petsc/doc/manual/
H A Dts.md679 ## IMEX Methods for fast-slow systems
681 Consider a fast-slow ODE system
685 \dot{u}^{slow} & = f^{slow}(t, u^{slow},u^{fast}) \\
686 M \dot{u}^{fast} & = g^{fast}(t, u^{slow},u^{fast}) + f^{fast}(t, u^{slow},u^{fast})
690 where $u^{slow}$ is the slow component and $u^{fast}$ is the
692 described above. Thus we want to treat $f^{slow}()$ and
696 - `TSARKIMEXSetFastSlowSplit()` informs PETSc to use ARKIMEX to solve a fast-slow system.
697 - `TSRHSSplitSetIS()` specifies the index set for the slow/fast components.
698 - `TSRHSSplitSetRHSFunction()` specifies the parts to be handled explicitly $f^{slow}()$ and $f^{fa…
701 …mensional Jacobian whereas only a partial Jacobian is needed for the fast-slow split which is more…
H A Dperformance.md565 …running optimized code. Using `-malloc_debug` or `-malloc_test` for large runs can slow them signi…
566 …recommend turning them off if you code is painfully slow and you don't need the testing. In additi…
699 slow; this skews all of the flop rates and timing results. The file
705 with lower memory bandwidths (slow memory access) attempt to
H A Dgetting_started.md605 using four OpenMP threads per MPI process will slow the code down since now one core must switch ba…
624 cores on the system; otherwise the code will slow down dramatically.
649 if one wishes to use the GPU computational power on it. This memory copy is slow compared to the GP…
H A Dksp.md566 formula $r = b - Ax$, the routine is slow and should be used only
641 …cesses) this synchronization is very time consuming and can significantly slow the computation. Pi…
1236 critical in AMG performance – too slow coarsening will result in an
1345 threshold) should be tried if convergence is slow.
H A Dprofiling.md622 loaded from the disk (a very slow process). This activity distorts the
H A Dtao.md370 the Hessian of an objective function. These approximations will slow the
1624 be calculated. The downside is that this algorithm can be slow to
H A Dmat.md273 memory allocation can slow the computation.
/petsc/doc/changes/
H A D322.md145 - Add a new ARKIMEX solver for fast-slow systems that are partitioned component-wise and additively…
/petsc/doc/install/
H A Dinstall.md206 If you are behind a firewall and cannot use a proxy for the downloads or have a very slow
628 troublesome and slow we recommend only installing PETSc with those configuration
/petsc/src/ksp/ksp/tutorials/output/
H A Dex2_help.out266 …-ksp_gmres_modifiedgramschmidt: modified Gram-Schmidt (slow, more stable) (KSPGMRESSetOrthogonaliz…
/petsc/src/binding/petsc4py/src/petsc4py/PETSc/
H A DTS.pyx346 """Use ARKIMEX for solving a fast-slow system.
353 Set to True for fast-slow partitioned systems.
/petsc/doc/tutorials/physics/
H A Dguide_to_stokes.md17 describe slow flow of an incompressible fluid with velocity $u$, pressure $p$, and body force $f$.
/petsc/share/petsc/datafiles/meshes/
H A Dtestcase3D.cas2437 (dpm/film-non-planar-edge-slow-down? #t)
2865 (amg/ignore-slow-communication? #f)
2866 (amg/ignore-slow-communication-interval 1)
2867 (amg/force-slow-communication-optimization? #f)
3313 (prepdf/ufla-y-slow "no")
3314 (prepdf/ufla-num-y-slow-pts 20)
/petsc/doc/faq/
H A Dindex.md1343 … time. What can I do to make this process faster? Or MatSetValues() is so slow; what can I do to s…
/petsc/doc/
H A Dpetsc.bib38199 @Article{ watson.billups.ea:slow,