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GPU implementation of sparse equality constraint Jacobian #49

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0cb0b5c
Port equality constraint Jacobian from PETSc to RAJA GPU kernels
kswirydo Apr 20, 2026
a5227de
Add comments and annotations to eq Jacobian GPU port
kswirydo Apr 23, 2026
0e94e1c
Apply pre-commmit fixes
pelesh Apr 23, 2026
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43 changes: 43 additions & 0 deletions src/opflow/model/power_bal_hiop/paramsrajahiop.cpp
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@ int BUSParamsRajaHiop::destroy(OPFLOW opflow) {
h_allocator_.deallocate(bl);
h_allocator_.deallocate(xidx);
h_allocator_.deallocate(gidx);
h_allocator_.deallocate(eqjacsp_selfidx);
if (opflow->include_powerimbalance_variables) {
h_allocator_.deallocate(xidxpimb);
h_allocator_.deallocate(powerimbalance_penalty);
Expand All @@ -45,6 +46,7 @@ int BUSParamsRajaHiop::destroy(OPFLOW opflow) {
d_allocator_.deallocate(bl_dev_);
d_allocator_.deallocate(xidx_dev_);
d_allocator_.deallocate(gidx_dev_);
d_allocator_.deallocate(eqjacsp_selfidx_dev_);
if (opflow->include_powerimbalance_variables) {
d_allocator_.deallocate(xidxpimb_dev_);
d_allocator_.deallocate(powerimbalance_penalty_dev_);
Expand Down Expand Up @@ -84,6 +86,7 @@ int BUSParamsRajaHiop::copy(OPFLOW opflow) {

resmgr.copy(xidx_dev_, xidx);
resmgr.copy(gidx_dev_, gidx);
resmgr.copy(eqjacsp_selfidx_dev_, eqjacsp_selfidx);
if (opflow->include_powerimbalance_variables) {
resmgr.copy(xidxpimb_dev_, xidxpimb);
resmgr.copy(jacsp_idx_dev_, jacsp_idx);
Expand All @@ -108,6 +111,7 @@ int BUSParamsRajaHiop::copy(OPFLOW opflow) {
xidx_dev_ = xidx;
xidxpimb_dev_ = xidxpimb;
gidx_dev_ = gidx;
eqjacsp_selfidx_dev_ = eqjacsp_selfidx;
jacsp_idx_dev_ = jacsp_idx;
jacsq_idx_dev_ = jacsq_idx;
powerimbalance_penalty_dev_ = powerimbalance_penalty;
Expand Down Expand Up @@ -145,6 +149,7 @@ int BUSParamsRajaHiop::allocate(OPFLOW opflow) {

xidx = paramAlloc<int>(h_allocator_, nbus);
gidx = paramAlloc<int>(h_allocator_, nbus);
eqjacsp_selfidx = paramAlloc<int>(h_allocator_, 2 * nbus);

if (opflow->include_powerimbalance_variables) {
xidxpimb = paramAlloc<int>(h_allocator_, nbus);
Expand Down Expand Up @@ -232,6 +237,7 @@ int BUSParamsRajaHiop::allocate(OPFLOW opflow) {

xidx_dev_ = paramAlloc<int>(d_allocator_, nbus);
gidx_dev_ = paramAlloc<int>(d_allocator_, nbus);
eqjacsp_selfidx_dev_ = paramAlloc<int>(d_allocator_, 2 * nbus);

if (opflow->include_powerimbalance_variables) {
xidxpimb_dev_ = paramAlloc<int>(d_allocator_, nbus);
Expand Down Expand Up @@ -278,6 +284,9 @@ int LINEParamsRajaHiop::copy(OPFLOW opflow) {
resmgr.copy(ineqjacsp_idx_dev_, ineqjacsp_idx);
resmgr.copy(xslackidx_dev_, xslackidx);
}
resmgr.copy(eqjacsp_idx_dev_, eqjacsp_idx);
resmgr.copy(eqjacsp_diag_idx_dev_, eqjacsp_diag_idx);
resmgr.copy(isdcline_dev_, isdcline);
#else
Gff_dev_ = Gff;
Bff_dev_ = Bff;
Expand All @@ -299,6 +308,9 @@ int LINEParamsRajaHiop::copy(OPFLOW opflow) {
ineqjacsp_idx_dev_ = ineqjacsp_idx;
xslackidx_dev_ = xslackidx;
}
eqjacsp_idx_dev_ = eqjacsp_idx;
eqjacsp_diag_idx_dev_ = eqjacsp_diag_idx;
isdcline_dev_ = isdcline;
#endif
return 0;
}
Expand Down Expand Up @@ -328,6 +340,9 @@ int LINEParamsRajaHiop::destroy(OPFLOW opflow) {
h_allocator_.deallocate(ineqjacsp_idx);
h_allocator_.deallocate(xslackidx);
}
h_allocator_.deallocate(eqjacsp_idx);
h_allocator_.deallocate(eqjacsp_diag_idx);
h_allocator_.deallocate(isdcline);

#ifdef EXAGO_ENABLE_GPU
// Destroy parameter arrays on the device
Expand All @@ -354,6 +369,9 @@ int LINEParamsRajaHiop::destroy(OPFLOW opflow) {
d_allocator_.deallocate(ineqjacsp_idx_dev_);
d_allocator_.deallocate(xslackidx_dev_);
}
d_allocator_.deallocate(eqjacsp_idx_dev_);
d_allocator_.deallocate(eqjacsp_diag_idx_dev_);
d_allocator_.deallocate(isdcline_dev_);
#endif

return 0;
Expand Down Expand Up @@ -404,6 +422,10 @@ int LINEParamsRajaHiop::allocate(OPFLOW opflow) {
xslackidx = paramAlloc<int>(h_allocator_, nlinelim);
}

eqjacsp_idx = paramAlloc<int>(h_allocator_, nlineON);
eqjacsp_diag_idx = paramAlloc<int>(h_allocator_, 4 * nlineON);
isdcline = paramAlloc<int>(h_allocator_, nlineON);

PetscInt j = 0;
/* Populate arrays */
for (i = 0; i < ps->nline; i++) {
Expand Down Expand Up @@ -451,6 +473,7 @@ int LINEParamsRajaHiop::allocate(OPFLOW opflow) {
j++;
}

isdcline[linei] = (int)line->isdcline;
linei++;
}

Expand Down Expand Up @@ -480,6 +503,10 @@ int LINEParamsRajaHiop::allocate(OPFLOW opflow) {
ineqjacsp_idx_dev_ = paramAlloc<int>(d_allocator_, nlinelim);
xslackidx_dev_ = paramAlloc<int>(d_allocator_, nlinelim);
}

eqjacsp_idx_dev_ = paramAlloc<int>(d_allocator_, nlineON);
eqjacsp_diag_idx_dev_ = paramAlloc<int>(d_allocator_, 4 * nlineON);
isdcline_dev_ = paramAlloc<int>(d_allocator_, nlineON);
#endif
return 0;
}
Expand Down Expand Up @@ -630,6 +657,8 @@ int GENParamsRajaHiop::destroy(OPFLOW opflow) {
h_allocator_.deallocate(gineqidxgen);
h_allocator_.deallocate(gbineqidxgen);
h_allocator_.deallocate(pgs);
h_allocator_.deallocate(xpdevidx);
h_allocator_.deallocate(xpsetidx);
h_allocator_.deallocate(eqjacspgen_idx);
h_allocator_.deallocate(ineqjacspgen_idx);
}
Expand All @@ -656,6 +685,8 @@ int GENParamsRajaHiop::destroy(OPFLOW opflow) {
d_allocator_.deallocate(gineqidxgen_dev_);
d_allocator_.deallocate(gbineqidxgen_dev_);
d_allocator_.deallocate(pgs_dev_);
d_allocator_.deallocate(xpdevidx_dev_);
d_allocator_.deallocate(xpsetidx_dev_);
d_allocator_.deallocate(eqjacspgen_idx_dev_);
d_allocator_.deallocate(ineqjacspgen_idx_dev_);
}
Expand Down Expand Up @@ -697,6 +728,8 @@ int GENParamsRajaHiop::copy(OPFLOW opflow) {
resmgr.copy(eqjacspgen_idx_dev_, eqjacspgen_idx);
resmgr.copy(ineqjacspgen_idx_dev_, ineqjacspgen_idx);
resmgr.copy(pgs_dev_, pgs);
resmgr.copy(xpdevidx_dev_, xpdevidx);
resmgr.copy(xpsetidx_dev_, xpsetidx);
}
#else
cost_alpha_dev_ = cost_alpha;
Expand All @@ -721,6 +754,8 @@ int GENParamsRajaHiop::copy(OPFLOW opflow) {
eqjacspgen_idx_dev_ = eqjacspgen_idx;
ineqjacspgen_idx_dev_ = ineqjacspgen_idx;
pgs_dev_ = pgs;
xpdevidx_dev_ = xpdevidx;
xpsetidx_dev_ = xpsetidx;
#endif
return 0;
}
Expand Down Expand Up @@ -771,6 +806,8 @@ int GENParamsRajaHiop::allocate(OPFLOW opflow) {
eqjacspgen_idx = paramAlloc<int>(h_allocator_, ngenON);
ineqjacspgen_idx = paramAlloc<int>(h_allocator_, ngenON);
pgs = paramAlloc<double>(h_allocator_, ngenON);
xpdevidx = paramAlloc<int>(h_allocator_, ngenON);
xpsetidx = paramAlloc<int>(h_allocator_, ngenON);
}

/* Insert data in genparams */
Expand Down Expand Up @@ -798,6 +835,10 @@ int GENParamsRajaHiop::allocate(OPFLOW opflow) {
vs[geni] = gen->vs;
if (opflow->has_gensetpoint) {
pgs[geni] = gen->pgs;
if (!gen->isrenewable) {
xpdevidx[geni] = opflow->idxn2sd_map[gen->startxpdevloc];
xpsetidx[geni] = opflow->idxn2sd_map[gen->startxpsetloc];
}
}

xidx[geni] = opflow->idxn2sd_map[loc];
Expand Down Expand Up @@ -844,6 +885,8 @@ int GENParamsRajaHiop::allocate(OPFLOW opflow) {
eqjacspgen_idx_dev_ = paramAlloc<int>(d_allocator_, ngenON);
ineqjacspgen_idx_dev_ = paramAlloc<int>(d_allocator_, ngenON);
pgs_dev_ = paramAlloc<double>(d_allocator_, ngenON);
xpdevidx_dev_ = paramAlloc<int>(d_allocator_, ngenON);
xpsetidx_dev_ = paramAlloc<int>(d_allocator_, ngenON);
}
#endif
return 0;
Expand Down
23 changes: 18 additions & 5 deletions src/opflow/model/power_bal_hiop/paramsrajahiop.h
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Original file line number Diff line number Diff line change
Expand Up @@ -31,9 +31,11 @@ struct BUSParamsRajaHiop {
int *hesssp_idx; /* KS: Hessian indices */
int *ispv; /* KS: ispv[i] = 1 if bus is PV bus */
int *gineqidx; /* KS: starting position of bus ineq constraints */
int *ineqjacsp_idx; /* KS: index in flat sparse ineq Jacobian array */
int *genoffset; /* KS: Offset into flattened gen array for this bus */
int *ngenONbus; /* KS: Number of ON generators on this bus */
int *ineqjacsp_idx; /* KS: index in flat sparse ineq Jacobian array */
int *genoffset; /* KS: Offset into flattened gen array for this bus */
int *ngenONbus; /* KS: Number of ON generators on this bus */
int *eqjacsp_selfidx; /* Flat-array position for bus self-admittance in eq
Jacobian. [2*i] = P-row base, [2*i+1] = Q-row base */

// Device data
int *isref_dev_; /* isref[i] = 1 if bus is reference bus */
Expand All @@ -59,6 +61,7 @@ struct BUSParamsRajaHiop {
int *ineqjacsp_idx_dev_; /* KS: device counterpart of ineqjacsp_idx_ */
int *genoffset_dev_; /* KS: dev counterpart of genoffset */
int *ngenONbus_dev_; /* KS: dev counterpart of ngenONbus */
int *eqjacsp_selfidx_dev_; /* KS: eqjacsp_selfidx device counterpart */

int allocate(OPFLOW);
int destroy(OPFLOW);
Expand All @@ -84,7 +87,8 @@ struct GENParamsRajaHiop {
double *pgs; /* real power output setpoint */
double *apf; /* generator AGC participation factor */
double *vs; /* voltage setpoint */
int *isrenewable; /* Is renewable generator? */
int *xpsetidx; /* Starting locations in X vector for set-point variables */
int *isrenewable; /* Is renewable generator? */

int *xidx; /* starting locations in X vector */
int *xpdevidx; /* KS: tarting locations of deviation variables in X vector */
Expand Down Expand Up @@ -119,6 +123,7 @@ struct GENParamsRajaHiop {
double *pgs_dev_; /* real power output setpoint */
double *apf_dev_; /* KS: device counterpart of apf */
double *vs_dev_; /* KS: device counterpart of vs */
int *xpsetidx_dev_; /* KS: xpsetidx_ GPU counterpart */
int *isrenewable_dev_; /* Is renewable generator? */

int *xidx_dev_; /* starting locations in X vector */
Expand Down Expand Up @@ -213,6 +218,11 @@ struct LINEParamsRajaHiop {
int *linelimidx; /* Indices for subset of lines that have finite limits */
int *ineqjacsp_idx; /* KS: Position in flat sparse ineq Jacobian array */
int *xslackidx; /* Starting location of slack variables in X vector */
int *eqjacsp_idx; /* Flat-array offset for off-diagonal eq Jacobian entries */
int *eqjacsp_diag_idx; /* Flat-array positions for diagonal entries per line
[4*l+0]=from P-row, [4*l+1]=from Q-row,
[4*l+2]=to P-row, [4*l+3]=to Q-row */
int *isdcline; /* isdcline[i] = 1 if line is a DC line */

// Device data
double *Gff_dev_; /* From side self conductance */
Expand All @@ -237,7 +247,10 @@ struct LINEParamsRajaHiop {
int *
linelimidx_dev_; /* Indices for subset of lines that have finite limits */
int *ineqjacsp_idx_dev_; /* KS: Position in flat sparse ineq Jacobian array */
int *xslackidx_dev_; /* Starting location of slack variables in X vector */
int *xslackidx_dev_; /* Starting location of slack variables in X vector */
int *eqjacsp_idx_dev_; /* KS: GPU counterpart for eqjacsp_idx_ */
int *eqjacsp_diag_idx_dev_; /* KS: GPU counterpart for eqjacsp_diag_idx_*/
int *isdcline_dev_;

int allocate(OPFLOW);
int destroy(OPFLOW);
Expand Down
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