inciter::DG class

DG Charm++ chare array used to advance PDEs in time with DG+RK.

Reference

Public static functions

static void registerReducers(): Configure Charm++ reduction types for concatenating BC nodelists.

Constructors, destructors, conversion operators

DG(CkMigrateMessage* msg) explicit: Migrate constructor.

Public functions

auto DG(const CProxy_Discretization& disc, const CProxy_Ghosts& ghostsproxy, const std::map<int, std::vector<std::size_t>>& bface, const std::map<int, std::vector<std::size_t>>&, const std::vector<std::size_t>& triinpoel) -> DG_SDAG_CODE explicit: Constructor.
void ResumeFromSync() override: Return from migration.
void resizeSolVectors(): Resize solution vectors after extension due to Ghosts and continue setup.
void setup(): Setup: query boundary conditions, output mesh, etc.
void box(tk::real v, const std::vector<tk::real>& blkvols): Receive total box IC volume and set conditions in box.
void evalLB(int nrestart)
void start(): Start time stepping.
void next(): Continue to next time step.
void comrefine(int fromch, const std::vector<std::size_t>& tetid, const std::vector<std::size_t>& ndof): Receive chare-boundary updated solution from neighboring chares.
void comsmooth(int fromch, const std::vector<std::size_t>& tetid, const std::vector<std::size_t>& ndof)
void comlim(int fromch, const std::vector<std::size_t>& tetid, const std::vector<std::vector<tk::real>>& u, const std::vector<std::vector<tk::real>>& prim): Receive chare-boundary limiter function data from neighboring chares.
void comreco(int fromch, const std::vector<std::size_t>& tetid, const std::vector<std::vector<tk::real>>& u, const std::vector<std::vector<tk::real>>& prim): Receive chare-boundary reconstructed data from neighboring chares.
void comsol(int fromch, std::size_t fromstage, const std::vector<std::size_t>& tetid, const std::vector<std::vector<tk::real>>& u, const std::vector<std::vector<tk::real>>& prim, const std::vector<std::size_t>& ndof): Receive chare-boundary ghost data from neighboring chares.
void comnodalExtrema(const std::vector<std::size_t>& gid, const std::vector<std::vector<tk::real>>& G1, const std::vector<std::vector<tk::real>>& G2): Receive contributions to nodal gradients on chare-boundaries.
void resizeNodalExtremac(): Initialize the vector of nodal extrema.
void evalNodalExtrmRefEl(const std::size_t ncomp, const std::size_t nprim, const std::size_t ndof_NodalExtrm, const std::vector<std::size_t>& bndel, const std::vector<std::size_t>& inpoel, const std::vector<std::size_t>& gid, const std::unordered_map<std::size_t, std::size_t>& bid, const tk::Fields& U, const tk::Fields& P, std::vector<std::vector<tk::real>>& uNodalExtrm, std::vector<std::vector<tk::real>>& pNodalExtrm): Compute the nodal extrema of ref el derivatives for chare-boundary nodes.
void comnodeout(const std::vector<std::size_t>& gid, const std::vector<std::size_t>& nesup, const std::vector<std::vector<tk::real>>& Lu, const std::vector<std::vector<tk::real>>& Lp): Receive nodal solution (ofor field output) contributions from neighboring chares.
void refine(const std::vector<tk::real>& l2res): Optionally refine/derefine mesh.
void resizePostAMR(const std::vector<std::size_t>&, const tk::UnsMesh::Chunk& chunk, const tk::UnsMesh::Coords& coord, const std::unordered_map<std::size_t, tk::UnsMesh::Edge>&, const std::unordered_map<std::size_t, std::size_t>& addedTets, const std::set<std::size_t>& removedNodes, const std::unordered_map<std::size_t, std::size_t>& amrNodeMap, const tk::NodeCommMap& nodeCommMap, const std::map<int, std::vector<std::size_t>>& bface, const std::map<int, std::vector<std::size_t>>&, const std::vector<std::size_t>& triinpoel, const std::unordered_map<std::size_t, std::set<std::size_t>>& elemblockid): Receive new mesh from Refiner.
void extractFieldOutput(const std::vector<std::size_t>&, const tk::UnsMesh::Chunk& chunk, const tk::UnsMesh::Coords& coord, const std::unordered_map<std::size_t, tk::UnsMesh::Edge>&, const std::unordered_map<std::size_t, std::size_t>& addedTets, const tk::NodeCommMap& nodeCommMap, const std::map<int, std::vector<std::size_t>>& bface, const std::map<int, std::vector<std::size_t>>&, const std::vector<std::size_t>& triinpoel, CkCallback c): Extract field output going to file.
auto solution() const -> const tk::Fields&
void lhs(): Compute left hand side.
void resized(): Unused in DG.
void transferSol(): (no-op)
void advance(tk::real, tk::real): (no-op)
void solve(tk::real newdt): Compute right hand side and solve system.
void step(): Evaluate whether to continue with next time step.

Charm++ pack/unpack serializer member functions

CProxy_Discretization m_disc: Discretization proxy.
CProxy_Ghosts m_ghosts: Distributed Ghosts proxy.
std::size_t m_ndof_NodalExtrm: Degree of freedom for nodal extrema vector. When DGP1 is applied, there is one degree of freedom for cell average variable. When DGP2 is applied, the degree of freedom is 4 which refers to cell average and gradients in three directions.
std::size_t m_nsol: Counter signaling that we have received all our solution ghost data.
std::size_t m_ninitsol: Counter signaling that we have received all our solution ghost data during setup.
std::size_t m_nlim: Counter signaling that we have received all our limiter function ghost data.
std::size_t m_nnod: Counter signaling that we have received all our node solution contributions.
std::size_t m_nrefine: Counter signaling that we have received all refined ndof.
std::size_t m_nsmooth: Counter signaling that we have received all smoothed ndof.
std::size_t m_nreco: Counter signaling that we have received all our reconstructed ghost data.
std::size_t m_nnodalExtrema: Counter signaling that we have received all our nodal extrema from ghost chare partitions.
tk::Fields m_u: Vector of unknown/solution average over each mesh element.
tk::Fields m_un: Vector of unknown at previous time-step.
tk::Fields m_p: Vector of primitive quantities over each mesh element.
tk::Fields m_geoElem: Element geometry.
tk::Fields m_lhs: Left-hand side mass-matrix which is a diagonal matrix.
tk::Fields m_rhs: Vector of right-hand side.
std::vector<std::vector<tk::real>> m_mtInv: Inverse of Taylor mass-matrix.
std::vector<std::vector<tk::real>> m_uNodalExtrm: Vector of nodal extrema for conservative variables.
std::vector<std::vector<tk::real>> m_pNodalExtrm: Vector of nodal extrema for primitive variables.
std::unordered_map<std::size_t, std::vector<tk::real>> m_uNodalExtrmc: Buffer for vector of nodal extrema for conservative variables.
std::unordered_map<std::size_t, std::vector<tk::real>> m_pNodalExtrmc: Buffer for vector of nodal extrema for primitive variables.
std::size_t m_npoin: Counter for number of nodes on this chare excluding ghosts.
ElemDiagnostics m_diag: Diagnostics object.
std::size_t m_stage: Runge-Kutta stage counter.
std::vector<std::size_t> m_ndof: Vector of local number of degrees of freedom for each element.
std::vector<std::size_t> m_numEqDof: Vector of number of degrees of freedom for each PDE equation/component.
std::array<std::vector<std::vector<tk::real>>, 3> m_uc: Solution receive buffers for ghosts only.
std::array<std::vector<std::vector<tk::real>>, 3> m_pc: Primitive-variable receive buffers for ghosts only.
std::array<std::vector<std::size_t>, 3> m_ndofc: Number of degrees of freedom (for p-adaptive) receive buffers for ghosts only.
std::size_t m_initial: 1 if starting time stepping, 0 if during time stepping
tk::Fields m_uElemfields: Solution elem output fields.
tk::Fields m_pElemfields: Primitive elem output fields.
tk::Fields m_uNodefields: Solution nodal output fields.
tk::Fields m_pNodefields: Primitive nodal output fields.
std::unordered_map<std::size_t, std::pair<std::vector<tk::real>, std::size_t>> m_uNodefieldsc
std::unordered_map<std::size_t, std::pair<std::vector<tk::real>, std::size_t>> m_pNodefieldsc
Ghosts::OutMesh m_outmesh: Storage for refined mesh used for field output.
std::vector<std::unordered_set<std::size_t>> m_boxelems: Element ids at which box ICs are defined by user (multiple boxes)
std::vector<std::size_t> m_shockmarker: Shock detection marker for field output.
void pup(PUP::er& p) override: Pack/Unpack serialize member function.
void operator|(PUP::er& p, DG& i): Pack/Unpack serialize operator|.

Function documentation

static void inciter::DG::registerReducers()

Configure Charm++ reduction types for concatenating BC nodelists.

Since this is a [initnode] routine, the runtime system executes the routine exactly once on every logical node early on in the Charm++ init sequence. Must be static as it is 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.

DG_SDAG_CODE inciter::DG::DG(const CProxy_Discretization& disc, const CProxy_Ghosts& ghostsproxy, const std::map<int, std::vector<std::size_t>>& bface, const std::map<int, std::vector<std::size_t>>&, const std::vector<std::size_t>& triinpoel) explicit

Constructor.

Parameters
disc in	Discretization proxy
ghostsproxy
bface in	Boundary-faces mapped to side set ids
triinpoel in	Boundary-face connectivity

void inciter::DG::ResumeFromSync() override

Return from migration.

This is called when load balancing (LB) completes. The presence of this function does not affect whether or not we block on LB.

void inciter::DG::box(tk::real v, const std::vector<tk::real>& blkvols)

Receive total box IC volume and set conditions in box.

Parameters
v in	Total volume within user-specified box
blkvols

void inciter::DG::evalLB(int nrestart)

Parameters
nrestart in	Number of times restarted

void inciter::DG::comrefine(int fromch, const std::vector<std::size_t>& tetid, const std::vector<std::size_t>& ndof)

Receive chare-boundary updated solution from neighboring chares.

Parameters
fromch in	Sender chare id
tetid in	Ghost tet ids we receive solution data for
ndof in	Number of degrees of freedom for chare-boundary elements

This function receives contributions to the refined ndof data from fellow chares.

void inciter::DG::comsmooth(int fromch, const std::vector<std::size_t>& tetid, const std::vector<std::size_t>& ndof)

Parameters
fromch in	Sender chare id
tetid in	Ghost tet ids we receive solution data for
ndof in	Number of degrees of freedom for chare-boundary elements

This function receives contributions to the smoothed ndof data from fellow chares.

void inciter::DG::comlim(int fromch, const std::vector<std::size_t>& tetid, const std::vector<std::vector<tk::real>>& u, const std::vector<std::vector<tk::real>>& prim)

Receive chare-boundary limiter function data from neighboring chares.

Parameters
fromch in	Sender chare id
tetid in	Ghost tet ids we receive solution data for
u in	Limited high-order solution
prim in	Limited high-order primitive quantities

This function receives contributions to the limited solution from fellow chares.

void inciter::DG::comreco(int fromch, const std::vector<std::size_t>& tetid, const std::vector<std::vector<tk::real>>& u, const std::vector<std::vector<tk::real>>& prim)

Receive chare-boundary reconstructed data from neighboring chares.

Parameters
fromch in	Sender chare id
tetid in	Ghost tet ids we receive solution data for
u in	Reconstructed high-order solution
prim in	Limited high-order primitive quantities

This function receives contributions to the reconstructed solution from fellow chares.

void inciter::DG::comsol(int fromch, std::size_t fromstage, const std::vector<std::size_t>& tetid, const std::vector<std::vector<tk::real>>& u, const std::vector<std::vector<tk::real>>& prim, const std::vector<std::size_t>& ndof)

Receive chare-boundary ghost data from neighboring chares.

Parameters
fromch in	Sender chare id
fromstage in	Sender chare time step stage
tetid in	Ghost tet ids we receive solution data for
u in	Solution ghost data
prim in	Primitive variables in ghost cells
ndof in	Number of degrees of freedom for chare-boundary elements

This function receives contributions to the unlimited solution from fellow chares.

void inciter::DG::comnodalExtrema(const std::vector<std::size_t>& gid, const std::vector<std::vector<tk::real>>& G1, const std::vector<std::vector<tk::real>>& G2)

Receive contributions to nodal gradients on chare-boundaries.

Parameters
gid in	Global mesh node IDs at which we receive grad contributions
G1 in	Partial contributions of extrema for conservative variables to chare-boundary nodes
G2 in	Partial contributions of extrema for primitive variables to chare-boundary nodes

This function receives contributions to m_uNodalExtrm/m_pNodalExtrm , which stores nodal extrems at mesh chare-boundary nodes. While m_uNodalExtrm/m_pNodalExtrm stores own contributions, m_uNodalExtrmc /m_pNodalExtrmc collects the neighbor chare contributions during communication.

void inciter::DG::evalNodalExtrmRefEl(const std::size_t ncomp, const std::size_t nprim, const std::size_t ndof_NodalExtrm, const std::vector<std::size_t>& bndel, const std::vector<std::size_t>& inpoel, const std::vector<std::size_t>& gid, const std::unordered_map<std::size_t, std::size_t>& bid, const tk::Fields& U, const tk::Fields& P, std::vector<std::vector<tk::real>>& uNodalExtrm, std::vector<std::vector<tk::real>>& pNodalExtrm)

Compute the nodal extrema of ref el derivatives for chare-boundary nodes.

Parameters
ncomp in	Number of conservative variables
nprim in	Number of primitive variables
ndof_NodalExtrm in	Degree of freedom for nodal extrema
bndel in	List of elements contributing to chare-boundary nodes
inpoel in	Element-node connectivity for element e
gid in	Local->global node id map
bid in	Local chare-boundary node ids (value) associated to global node ids (key)
U in	Vector of conservative variables
P in	Vector of primitive variables
uNodalExtrm in/out	Chare-boundary nodal extrema for conservative variables
pNodalExtrm in/out	Chare-boundary nodal extrema for primitive variables

void inciter::DG::comnodeout(const std::vector<std::size_t>& gid, const std::vector<std::size_t>& nesup, const std::vector<std::vector<tk::real>>& Lu, const std::vector<std::vector<tk::real>>& Lp)

Receive nodal solution (ofor field output) contributions from neighboring chares.

Parameters
gid in	Global mesh node IDs at which we receive contributions
nesup in	Number of elements surrounding points
Lu in	Partial contributions of solution nodal fields to chare-boundary nodes
Lp in	Partial contributions of primitive quantity nodal fields to chare-boundary nodes

void inciter::DG::resizePostAMR(const std::vector<std::size_t>&, const tk::UnsMesh::Chunk& chunk, const tk::UnsMesh::Coords& coord, const std::unordered_map<std::size_t, tk::UnsMesh::Edge>&, const std::unordered_map<std::size_t, std::size_t>& addedTets, const std::set<std::size_t>& removedNodes, const std::unordered_map<std::size_t, std::size_t>& amrNodeMap, const tk::NodeCommMap& nodeCommMap, const std::map<int, std::vector<std::size_t>>& bface, const std::map<int, std::vector<std::size_t>>&, const std::vector<std::size_t>& triinpoel, const std::unordered_map<std::size_t, std::set<std::size_t>>& elemblockid)

Receive new mesh from Refiner.

Parameters
chunk in	New mesh chunk (connectivity and global<->local id maps)
coord in	New mesh node coordinates
addedTets in	Newly added mesh cells and their parents (local ids)
removedNodes in	Newly removed mesh node local ids
amrNodeMap in	Node id map after amr (local ids)
nodeCommMap in	New node communication map
bface in	Boundary-faces mapped to side set ids
triinpoel in	Boundary-face connectivity
elemblockid in	Local tet ids associated with mesh block ids

void inciter::DG::extractFieldOutput(const std::vector<std::size_t>&, const tk::UnsMesh::Chunk& chunk, const tk::UnsMesh::Coords& coord, const std::unordered_map<std::size_t, tk::UnsMesh::Edge>&, const std::unordered_map<std::size_t, std::size_t>& addedTets, const tk::NodeCommMap& nodeCommMap, const std::map<int, std::vector<std::size_t>>& bface, const std::map<int, std::vector<std::size_t>>&, const std::vector<std::size_t>& triinpoel, CkCallback c)

Extract field output going to file.

Parameters
chunk in	Field-output mesh chunk (connectivity and global<->local id maps)
coord in	Field-output mesh node coordinates
addedTets in	Field-output mesh cells and their parents (local ids)
nodeCommMap in	Field-output mesh node communication map
bface in	Field-output meshndary-faces mapped to side set ids
triinpoel in	Field-output mesh boundary-face connectivity
c in	Function to continue with after the write

const tk::Fields& inciter::DG::solution() const

Returns	Const-ref to current solution

Const-ref access to current solution

void inciter::DG::solve(tk::real newdt)

Compute right hand side and solve system.

Parameters
newdt in	Size of this new time step

void inciter::DG::pup(PUP::er& p) override

Pack/Unpack serialize member function.

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

void inciter::DG::operator|(PUP::er& p, DG& i)

Pack/Unpack serialize operator|.

Parameters
p in/out	Charm++'s PUP::er serializer object reference
i in/out	DG object reference

Variable documentation

std::unordered_map<std::size_t, std::pair<std::vector<tk::real>, std::size_t>> inciter::DG::m_uNodefieldsc

Receive buffer for communication of solution node fields

Key: global node id, value: output fields and number of elements surrounding the node

std::unordered_map<std::size_t, std::pair<std::vector<tk::real>, std::size_t>> inciter::DG::m_pNodefieldsc

Receive buffer for communication of primitive quantity node fields