An analysis of vector startup access delays

In a multiport memory access vector processor such as the CRAY X-MP, the numbering of section (lines) relative to bank numbering affects the delay characteristics of vector memory accesses. The author examines numberings which affect the vector startup delay. It has been shown previously that section numberings now associated with the X-MP-4 reduced the steady-state section delays of randomly conflicting vector accesses, vis-a-vis the X-MP-2 numberings. For the present study, it is shown that these same numberings increase the startup delays of such accesses, thus establishing a tradeoff between numbering protocols