But due to, "@" operator and "wait_trigger()" method, it doesn't get the event triggered and it waits for the event e1_* to be triggered. Synchronization in a multithreaded environment in system verilog is done using event’s. Alternatively, the event pool and barrier pool classes make it possible to manage multiple events or barriers without the need to instantiate and distribute the event or barrier objects themselves, but you still have the challenge of making sure that components that access the same event … Register Model Components 5 DUTDUT PredictorPredictor Bus AgentBus Agent S D M 1100100001 0010100100 0110110110 uvm_reg_blockuvm_reg_block 1100100001 0010100100 In your example, why am I allowed to use a 'null' value for a class reference handle to temp_object without creating it in the first place with temp_obj=new()? a uvm_pool#(uvm_event). In UVM uvm_event and uvm_event_pool can be used for synchronization of multiple threads or components. The alternative solution which eliminates a need for the base uvm_object class is the following: ===== event_object event_object_h;.. One can use uvm_event_pool to do it. You may wish to save your code first. You could use uvm_pool if simple lookup of uvm_object is good enough. I will take example of two drivers to explain it. To actually set the value to the register in the DUT, use write() or update() method. By default, the event pool contains the events: begin, accept, and end. These methods will be explained later. The uvm_config_db provides simple API for this. The set() method does not set the value to a register in the DUT. The uvm_event#(type T = uvm_object) class is an extension of the abstract uvm_event_base class. Events can also be added by derivative objects. Look at the diagram in Summary section and see how many objects are involved to resolve the scope. get_global_pool: Returns the singleton global pool for the item type, T. get_global: Returns the specified item instance from the global item pool. The optional parameter T allows the user to define a data type which can be passed during an event trigger. get: Returns the object item at the given string key. uvm_eventを使うときは、uvm_event_poolを生成して使用するのがよさそう; uvm_report_xxxの発行カウントを読み取る仕組みが例示されており、これを使えば、UVMのみの環境であればSIMの実行結果を外部バッチに頼ることなく判定できますよ、と読める; くらいでしょうか。 It provides some additional services such as setting callbacks and maintaining the number of waiters. The uvm_event class is a wrapper class around the SystemVerilog event construct. An event pool is a specialization of uvm_pool#(KEY,T), e.g. However, if you want scope resolution for example, uvm_resource needs to be involved. Both events are triggered followed by waiting on the same event. How the reset() method works set() The set() method sets the desired value of a register field. uvm_event class is an abstract wrapper class around SystemVerilog event … Returns the event pool associated with this transaction. You will be required to enter some identification information in order to do so. uvm_object_string_pool methods and uvm_event_pool new: Creates a new pool with the given name. Simple example of uvm event is as follows. UVM is nothing but a wrapper library developed over SystemVerilog. User validation is required to run this simulator. So, the uvm_event and SystemVerilog events are the same but uvm_event has some additional functionality.. From the UVM Class reference:. get_type_name: Returns the type name of this object. Use of it is not limited to two components; one can make as many components as needed in sync. In the example, two events (e1_* and e2_*) are used. It only sets the value to the m_desired and the value properties of a register-field object. 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