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  • How to check whether the sequence is Active or dead

How to check whether the sequence is Active or dead

UVM 6753
uvm_sequence 23 put/get 1
debashis_paul
debashis_paul
Full Access
28 posts
June 25, 2017 at 8:01 pm

I am struck in a situation where my sequence is struck in a get statement. (request_q.get(req);, but the strange thing is that "req" item is already put into the "request_q" (request_q.put(req);) from another component and also the connection part is also correct, as this code is working fine in other testcase except that it just got struck in a testcase.

My question is "Is there a way to check whether my sequence which call the get statement is active or dead" ? any suggestion to debug such scenario where there is a successfull "put" but doesn't get the item from a "get".

Thanks,
Debashis

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chr_sue
chr_sue
Full Access
3893 posts
June 25, 2017 at 11:05 pm

In reply to debashis_paul:

Are you sure you are putting in a req in request_q? You can check this by printing req before you are doing the put. Both, put and get are blocking.

debashis_paul
debashis_paul
Full Access
28 posts
June 25, 2017 at 11:15 pm

In reply to chr_sue:

Quote:
In reply to debashis_paul:

Are you sure you are putting in a req in request_q? You can check this by printing req before you are doing the put. Both, put and get are blocking.

Yes, i am sure that i am putting. I do print the "req" before putting. Also put method comes out after putting, and hence i believe it is successful from the put side.

chr_sue
chr_sue
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3893 posts
June 25, 2017 at 11:36 pm

In reply to debashis_paul:

OK, fine. And what kind of component is request_q?

debashis_paul
debashis_paul
Full Access
28 posts
June 26, 2017 at 12:46 am

In reply to chr_sue:

it is uvm_transaction type object

chr_sue
chr_sue
Full Access
3893 posts
June 26, 2017 at 1:35 am

In reply to debashis_paul:

This confuses me. I was expecting this is a tlm_fifo object where you are putting a req in and performing a get to get a Transaction type_object out.

debashis_paul
debashis_paul
Full Access
28 posts
June 26, 2017 at 2:00 am

In reply to chr_sue:

Got a little clue of whats happening. But I couldn't find the reason of its happening and how to solve this issue.

Found out that, the sequence which is calling the get method is becoming dead (due to unknown reasons), so it is unable to get the request item.
Any idea, for the reasons when does a sequence goes dead?

chr_sue
chr_sue
Full Access
3893 posts
June 26, 2017 at 2:44 am

In reply to debashis_paul:

What do you mean with dead? Is it not constructed?

debashis_paul
debashis_paul
Full Access
28 posts
June 26, 2017 at 3:03 am

In reply to chr_sue:

It is constructed well. I am referring to it as "dead" because, I put several debug statement inside the sequence to display in a forever loop inside the body of sequence. It stops displaying after certain time.

chr_sue
chr_sue
Full Access
3893 posts
June 26, 2017 at 3:34 am

In reply to debashis_paul:

It is hard giving advice without seeing the Code. But if the get is successful for some iterations and it stops afterwards, no item is available. You could count the number of items you put and get.

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