Route Selection Guidelines - Route Selection Guidelines - 1.1 English

Route Selection Guidelines - Route Selection Guidelines - 1.1 English - PG313

Versal Adaptive SoC Programmable Network on Chip and Integrated Memory Controller 1.1 LogiCORE IP Product Guide (PG313)

Document ID

PG313

Release Date

2026-06-10

Version

1.1 English

Route selection is a major factor which affects the performance of the HBM subsystem. Consider the following points when designing the system:

In any condition, PTP offers the best performance per pseudo channel for any traffic pattern, because no lateral bandwidth is used across the HNoC.
The performance of the PTPL routing case is almost identical to the performance of PTP, because again no lateral bandwidth is used across the HNoC.
The PTPG routing case sees a performance drop compared to PTP or PTPL. This is due to the HNoC lateral bandwidth limitation. In a few cases, the PTPG performance might be commensurate with PTP when the traffic is bottlenecked by DRAM efficiency rather than the HNoC bandwidth.
The UNR traffic case sees a performance drop compared to PTP, PTPL, and PTPG in most cases. In UNR, each master is transacting with multiple slaves. In certain traffic patterns, the performance is affected due to the variations of loads handled by a pseudo channel. The effectiveness of the HBM_NMU read reorder buffer is also reduced due to the incoming interleaved read responses from multiple destinations.