inciter::ElemDiagnostics class

ElemDiagnostics class used to compute diagnostics while integrating PDEs.

Reference

Public static functions

static void registerReducers(): Configure Charm++ custom reduction types initiated from this class.

Public functions

auto compute(Discretization& d, const std::size_t nchGhost, const tk::Fields& geoElem, const std::vector<std::size_t>& ndofel, const tk::Fields& u) const -> bool: Compute diagnostics, e.g., residuals, norms of errors, etc.

Charm++ pack/unpack serializer member functions

void pup(PUP::er&): Pack/Unpack serialize member function.
void operator|(PUP::er& p, ElemDiagnostics& d): Pack/Unpack serialize operator|.

Function documentation

static void inciter::ElemDiagnostics::registerReducers()

Configure Charm++ custom reduction types initiated from this class.

This routine is supposed to be called from a Charm++ initnode routine. Since the runtime system executes initnode routines exactly once on every logical node early on in the Charm++ init sequence, they must be static as they are called without an object. See also: Section "Initializations at Program Startup" at in the Charm++ manual http://charm.cs.illinois.edu/manuals/html/charm++/manual.html.

bool inciter::ElemDiagnostics::compute(Discretization& d, const std::size_t nchGhost, const tk::Fields& geoElem, const std::vector<std::size_t>& ndofel, const tk::Fields& u) const

Compute diagnostics, e.g., residuals, norms of errors, etc.

Parameters
d in	Discretization base class to read from
nchGhost in	Number of chare boundary ghost elements
geoElem in	Element geometry
ndofel in	Vector of local number of degrees of freedom
u in	Current solution vector
Returns	True if diagnostics have been computed

Diagnostics are defined as some norm, e.g., L2 norm, of a quantity, computed in mesh elements, A, as ||A||_2 = sqrt[ sum_i(A_i)^2 V_i ], where the sum is taken over all mesh elements and V_i is the cell volume. We send multiple sets of quantities to the host for aggregation across the whole mesh. The final aggregated solution will end up in Transporter::diagnostics(). Aggregation of the partially computed diagnostics is done via potentially different policies for each field.

void inciter::ElemDiagnostics::operator|(PUP::er& p, ElemDiagnostics& d)

Pack/Unpack serialize operator|.

Parameters
p in/out	Charm++'s PUP::er serializer object reference
d in/out	Diagnostics object reference