How to check back to back transaction coverage for any interface?

UVM
1

Hi,

I have done back to back transaction coverage by calculating clock time between two transactions.
Any other method?

Regards,
M

2

In reply to mann_verif:

Why is the clock time/number of clock cycles of interest for functional coverage?
What do you mean with ‘transaction coverage’?

3

In reply to chr_sue:

Hi chr_sue,

A transaction is qualified to be valid at the interface by valid bit, I’m checking if each valid arrives at each clock cycle- 2ns then assert b2b_received and pass it to coverage sampling. Query I have is is there any other method this can be done?
-M

4

In reply to mann_verif:

I guess the valid bit belongs to the transaction. Could you please explain why?
A transaction should be valid. What is the value of counting the valid transactions?

5

In reply to chr_sue:

In reply to mann_verif:
I guess the valid bit belongs to the transaction. Could you please explain why?
A transaction should be valid. What is the value of counting the valid transactions?

Need this for coverage, every transaction is qualified by valid bit, that is the structure of transaction.

6

In reply to mann_verif:

Sorry, but I do not understand what you are saying.
Could you please show your tansaction?

7

In reply to chr_sue:

I need to check back to back transaction coverage for following interface:
input logic crqm_notif_valid;
input logic crqm_bus_t crqm_notif_bus;

I keep on pushing currenttime to queue, check the difference of next queue item(qualified by crqm_notif_valid) , if difference = clk_time , b2b_received =1 which is passed to sampling.

This method works, but I have such many interfaces so was wondering if I can have a better generic method.

8

In reply to mann_verif:

If you do not explain what you want to do nobody can help you. ‘back to back transaction coverage’ is not precise enough.