message: Scale DEL_DOT_VEC_2D to 1M
  CHange scaling to linearly scale instead of quadratically scale
diff: #include "AppsData.hpp"
  #include "common/DataUtils.hpp"
  +#include <cmath>
  +
  +
  namespace rajaperf
  {
  namespace apps
  @@ -22,10 +25,11 @@ namespace apps
  DEL_DOT_VEC_2D::DEL_DOT_VEC_2D(const RunParams& params)
  : KernelBase(rajaperf::Apps_DEL_DOT_VEC_2D, params)
  {
  - setDefaultSize(312); // See rzmax in ADomain struct
  - setDefaultReps(1050);
  + setDefaultSize(1000*1000); // See rzmax in ADomain struct
  + setDefaultReps(100);
  - m_domain = new ADomain(getRunSize(), /* ndims = */ 2);
  + Index_type rzmax = std::sqrt(getRunSize())+1;
  + m_domain = new ADomain(rzmax, /* ndims = */ 2);
  m_array_length = m_domain->nnalls;
  