The Finer Points of UVM Sequences (Recorded Webinar)

[@sksameer208]

Absolutely superb.Thank You so much for sharing such wonderful lecture.

[@lxnny2357]

I went ahead and tried the pipelined driver example here, but I ran into an issue where my driver's call printed a warning indicating that the calling sequence was no longer running. The issue is that I needed to force in blocking code that would wait for all sequence items to be completed on the driver. I did this by adding a counter into the response fork.
Here's the warning that fired for me:
seq/uvm_sequencer_param_base.svh:341: $sformatf("Dropping response for sequence %0d, sequence not found. Probable cause: sequence exited or has been killed",
Then I added a blocking wait for all responses to be received before ending the sequence. For instance:
task body;
int num_completed = 0;
int max_num_xactions = 4;
repeat (max_num_xactions) begin
advdrv_xaction rq = advdrv_xaction::type_id::create("req");
start_item(rq);
if (!rq.randomize()) `uvm_fatal(get_full_name(), "failed to randomize transaction")
finish_item(rq);
fork begin
int id = rq.get_transaction_id();
`uvm_info (get_full_name(), $sformatf("Sent sequence item [transaction id=%2d]", id), UVM_LOW)
rq.print();
rsp = advdrv_xaction::type_id::create("rsp");
get_response(rsp, id); // Blocks
num_completed++;
`uvm_info(get_full_name(), "response data sent back to sequence", UVM_LOW)
rsp.print();
end join_none
end
wait (num_completed == max_num_xactions);
//

[@renvill]

17:01 - m_sequencer

[@unfrostedpoptart]

Thanks John - this is great.

[@MrSreekanthnarayan]

Hi John, is it possible to get examples shown in the presentation?

[@AndersonVenturini]

Thanks, John! This video was amazing!

[@kennethryan2]

The URL to the example code seems to be broken, I get a 404.

[@syedtaahir]

wow!!! good information

[@mandylin3380]

It's pretty useful!

[@ganeshbhogaraju4558]

Very informative esp @1745