105   PetscDeviceContext *sub;  in TestAsyncCoherence()  local
110   PetscCall(PetscDeviceContextForkWithStreamType(dctx, PETSC_STREAM_NONBLOCKING, nsub, &sub));  in TestAsyncCoherence()
113     PetscCall(PetscDeviceMalloc(sub[i], PETSC_MEMTYPE_HOST, n, &ptr));  in TestAsyncCoherence()
114     PetscCall(PetscDeviceFree(sub[i], ptr));  in TestAsyncCoherence()
116       PetscCall(PetscDeviceMalloc(sub[i], PETSC_MEMTYPE_DEVICE, n, &ptr));  in TestAsyncCoherence()
117       PetscCall(PetscDeviceFree(sub[i], ptr));  in TestAsyncCoherence()
122   PetscCall(PetscDeviceMalloc(sub[0], PETSC_MEMTYPE_HOST, n, &ptr));  in TestAsyncCoherence()
124   PetscCall(PetscDeviceFree(sub[1], ptr));  in TestAsyncCoherence()
127   PetscCall(PetscDeviceMalloc(sub[0], PETSC_MEMTYPE_HOST, n, &ptr));  in TestAsyncCoherence()
129   PetscCall(PetscDeviceArrayZero(sub[1], ptr, n));  in TestAsyncCoherence()
130   PetscCall(PetscDeviceContextSynchronize(sub[1]));  in TestAsyncCoherence()
134   PetscCall(PetscDeviceFree(sub[1], ptr));  in TestAsyncCoherence()
140     PetscCall(PetscDeviceArrayCopy(sub[0], tmp_ptr, ptr, n));  in TestAsyncCoherence()
141     PetscCall(PetscDeviceContextSynchronize(sub[0]));  in TestAsyncCoherence()
145     PetscCall(PetscDeviceFree(sub[1], ptr));  in TestAsyncCoherence()
148   PetscCall(PetscDeviceContextJoin(dctx, nsub, PETSC_DEVICE_CONTEXT_JOIN_DESTROY, &sub));  in TestAsyncCoherence()