07-25-2021 12:28 AM
I noticed that using multiple compute units mapped on different SRLs, the CU utilization % reported in Vitis Analyzer is lower than 99%. Is it because SRL1 in Alveo U50 has no direct connection to the HBM?
I tried the multiple compute units example available on github:
-default --> 99% CU utilization for all 4 CUs
-placing two units in SRL0 and two in SRL1 --> 99% CU utilization for all 4 CUs
07-27-2021 02:31 PM
SLR1 isn't directly connected to the HBM or the PCIe GTs - the time for data transfer could be increased when choosing SLR1 and potentially having an effect.
The examples you have given say that in both cases there is 99% utilization - is there a significant difference?