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s.corda
Participant
Participant
247 Views
Registered: ‎02-27-2019

Multiple compute units under-utilization

Hi,

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

 

Thanks

 

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JohnFedakIV
Moderator
Moderator
167 Views
Registered: ‎09-04-2020

Hi @s.corda,

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?

Regards,
~John

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s.corda
Participant
Participant
137 Views
Registered: ‎02-27-2019

Hi @JohnFedakIV ,

Thanks, there is a typo. In the second case the utilization is 95% for all the units.

 

 

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