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lygw
Explorer
Explorer
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Registered: ‎09-11-2019

Questions about reading data from HBM

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If I need to read 512 bits from HBM in Alveo U280, which choice should I take to read fastest?

1) read 512 bits(kernel ports have a maximum width of 512 bits) from one HBM channel(The AXI width per channel for HBM is 256 bits in Alveo U280)

2)separately read 256 bits from two HBM channels in parallel

3)separately read 128 bits from four HBM channels in parallel

Thanks for any help!

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hongh
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Moderator
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Registered: ‎11-04-2010

The first method needs to visit HBM twice(two period) to read 512bit data back, and the latter two methods only use one period to read the data. So I think the the latter two methods will be faster.

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hongh
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Moderator
305 Views
Registered: ‎11-04-2010

The first method needs to visit HBM twice(two period) to read 512bit data back, and the latter two methods only use one period to read the data. So I think the the latter two methods will be faster.

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Don't forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------

View solution in original post

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