95       rk->subts_current = rk->subts_fast;  in TSStepRefine_RK_MultirateNonsplit()
183   PetscCall(TSRHSSplitGetSubTS(ts, "fast", &rk->subts_fast));  in TSSetUp_RK_MultirateNonsplit()
184 …PetscCheck(rk->subts_slow && rk->subts_fast, PetscObjectComm((PetscObject)ts), PETSC_ERR_USER, "Mu…  in TSSetUp_RK_MultirateNonsplit()
187   rk->subts_current = rk->subts_fast;  in TSSetUp_RK_MultirateNonsplit()
221   if (rk->subts_fast) {  in TSReset_RK_MultirateSplit()
225     PetscCall(TSReset_RK_MultirateSplit(rk->subts_fast));  in TSReset_RK_MultirateSplit()
226     PetscCall(PetscFree(rk->subts_fast->data));  in TSReset_RK_MultirateSplit()
227     rk->subts_fast = NULL;  in TSReset_RK_MultirateSplit()
308   TS               subts_fast = rk->subts_fast, currentlevelts;  in TSStepRefine_RK_MultirateSplit()  local
309   TS_RK           *subrk_fast = (TS_RK *)subts_fast->data;  in TSStepRefine_RK_MultirateSplit()
330         currentlevelts = ((TS_RK *)currentlevelts->data)->subts_fast;  in TSStepRefine_RK_MultirateSplit()
335       PetscCall(TSPreStage(subts_fast, subrk_fast->stage_time));  in TSStepRefine_RK_MultirateSplit()
341       PetscCall(TSPostStage(subts_fast, subrk_fast->stage_time, i, Y));  in TSStepRefine_RK_MultirateSplit()
343 …PetscCall(TSComputeRHSFunction(subts_fast, t + k * h * rk->dtratio + h / rk->dtratio * c[i], Y[i],…  in TSStepRefine_RK_MultirateSplit()
351     if (subrk_fast->subts_fast) {  in TSStepRefine_RK_MultirateSplit()
352       subts_fast->ptime     = t + k * h / rk->dtratio;  in TSStepRefine_RK_MultirateSplit()
353       subts_fast->time_step = h / rk->dtratio;  in TSStepRefine_RK_MultirateSplit()
354       PetscCall(TSStepRefine_RK_MultirateSplit(subts_fast));  in TSStepRefine_RK_MultirateSplit()
398     PetscCall(TSComputeRHSFunction(rk->subts_fast, t + h * c[i], Y[i], YdotRHS_fast[i]));  in TSStep_RK_MultirateSplit()
428   PetscCall(TSRHSSplitGetSubTS(ts, "fast", &rk->subts_fast));  in TSSetUp_RK_MultirateSplit()
429 …PetscCheck(rk->subts_slow && rk->subts_fast, PetscObjectComm((PetscObject)ts), PETSC_ERR_USER, "Mu…  in TSSetUp_RK_MultirateSplit()
434   while (currentlevelrk->subts_fast) {  in TSSetUp_RK_MultirateSplit()
453     nextlevelts = currentlevelrk->subts_fast;  in TSSetUp_RK_MultirateSplit()
463     PetscCall(TSRHSSplitGetSubTS(nextlevelts, "fast", &nextlevelrk->subts_fast));  in TSSetUp_RK_MultirateSplit()