OMAP-L138 execution times

Hi,

I ran following code on my omap-l138 LCDK board. but this code takes about 40us to finish. Is this normal?

void Matrice(void)
{
      uint16_t i,k;
      int32_t accumulator;

      for(i=0;i<14;i++)
      {
            accumulator=0;

            for(k=0;k<21;k++)
           {
               if(MatriceInterne[i][k]==1)
               {
                     accumulator += matrice_data_input[k];
               }
            }
           matrice_data_output[i]= accumulator;
      }

}

my code is running on external memory(DDR2  at 132MHz.)

matrice_data_output[][] is on L2 memory.

thanks,

Ron