cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Highlighted
Visitor
Visitor
537 Views
Registered: ‎05-26-2019

Number of cycles required to simulate

Jump to solution

Hello,

I am working on Vivado 2018.3 and I am interested in knowing the number of cycles that my code requires to execute. However, in the Timing Report shown I don't see this information:

vhdl_1.png

In Vivado HLS, starting from a C code, after the synthesis and the cosimulation, I am able to see the latency of the vhdl, as shown below. How can I see the same information in Vivado? In Vivado I have both the vhdl and its test bench. 

table1.png

Thanks in advance for the help!

0 Kudos
1 Solution

Accepted Solutions
Highlighted
Contributor
Contributor
494 Views
Registered: ‎09-01-2015

When you look at the waveform .. its the number of clocks between when you start whatever it is you are doing and when you finsh or get the answer.

 

Mike

View solution in original post

6 Replies
Scholar
Scholar
517 Views
Registered: ‎08-01-2012

Its a fairly meaningless question - FPGAs and logic runs forever.

If you are looking for the latency, you can determine it from the testbench.

0 Kudos
Highlighted
Visitor
Visitor
513 Views
Registered: ‎05-26-2019

Thanks for your answer. Could you please tell me how to find the latency from the test bench? 

0 Kudos
Highlighted
Contributor
Contributor
495 Views
Registered: ‎09-01-2015

When you look at the waveform .. its the number of clocks between when you start whatever it is you are doing and when you finsh or get the answer.

 

Mike

View solution in original post

Highlighted
Xilinx Employee
Xilinx Employee
463 Views
Registered: ‎07-16-2008

With regards to your timing summary report, 'inf' means the path is ignored.

Did you ever specify period constraint with create_clock in your constraint file?

-------------------------------------------------------------------------
Don't forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------
Highlighted
Visitor
Visitor
441 Views
Registered: ‎05-26-2019

@mike_james_lewis  Thank you! I now realize it was silly question, but this is the only way we have to learn, right? Thanks!!

0 Kudos
Highlighted
Visitor
Visitor
436 Views
Registered: ‎05-26-2019
@graces Thank you, I already took a look at it!
0 Kudos