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Xilinx Employee
Xilinx Employee
245 Views
Registered: ‎09-28-2017

How to measure the latency of PCIe data path at U280 board

Hi All,

 

One customer want to know the latency about data transfer through PCIe/XDMA, I'm no idea how to measurement, can someone help it? Thanks in advance.

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Xilinx Employee
Xilinx Employee
223 Views
Registered: ‎10-19-2015

Re: How to measure the latency of PCIe data path at U280 board

Hi @hongweim 

We don't have a Xilinx solution for measuring latency. 

You could use XRT API calls to measure latency from host->pcie->dma->ddr ack (bvalid) 

clEnqueueMigrateMemObjects(handle.commands, 1, …, writeEvent)

… followed by …

clWaitForEvents(1, &writeEvent)

 

 

Since there is no standard solution, each solution will need to be tailored to meet the needs of the application. Is there any other information you can provide?

-M

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Xilinx Employee
Xilinx Employee
182 Views
Registered: ‎09-28-2017

Re: How to measure the latency of PCIe data path at U280 board

Hi @mcertosi ,

 

Thanks for your reply, and I will do some investigate for your suggestion update later to you.

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