message: Scale VOL3D linearly instead of cubicly
diff: #include "AppsData.hpp"
  #include "common/DataUtils.hpp"
  +#include <cmath>
  +
  +
  namespace rajaperf
  {
  namespace apps
  @@ -22,10 +25,11 @@ namespace apps
  VOL3D::VOL3D(const RunParams& params)
  : KernelBase(rajaperf::Apps_VOL3D, params)
  {
  - setDefaultSize(64); // See rzmax in ADomain struct
  - setDefaultReps(300);
  + setDefaultSize(100*100*100); // See rzmax in ADomain struct
  + setDefaultReps(100);
  - m_domain = new ADomain(getRunSize(), /* ndims = */ 3);
  + Index_type rzmax = std::cbrt(getRunSize())+1;
  + m_domain = new ADomain(rzmax, /* ndims = */ 3);
  m_array_length = m_domain->nnalls;
  