In reply to chr_sue:
In reply to cuonghle:
Keys are used together with uvm_pool which represents an assiciative arry´ay. This is different to a queue.
Please find below a link for an uvm_queue example. This does not work for 2 queues of the same type. BTW this example is nott running on VCS. Seems to be a weakness.
Maybe someboday has a good idea to resolve this issue.
(1) - EDA Playground
The uvm_pool is a container of uvm_queue, it allows to get your uvm_queue for any key. This is convenient if you want to share queues no matter your queues are the same type or diffrrent.