TLM Fifo Asynchronous Communication
TechniqueTLM Fifo Asynchronous Communication is an eUVM technique for exchanging transactions between scheduler-controlled UVM tasks and free-running worker threads, or between two asynchronous worker threads. It adapts standard UVM TLM FIFO event-based blocking by replacing event waits with software semaphores on asynchronous ports, enabling synchronization for threads that cannot wait on simulator events.
WIKI
Overview
TLM Fifo Asynchronous Communication is a technique described for eUVM multicore verification environments. It addresses how free-running asynchronous worker threads exchange transaction data with regular scheduler-controlled UVM tasks, while preserving synchronization through TLM FIFOs. In eUVM, worker threads are hierarchically owned by the simulator but are decoupled from the scheduler; they keep running when the scheduler activates, cannot wait for simulator events, and can trigger events. [worker_threads_in_euvm]
Although worker threads share memory with simulator tasks, the cited source states that UVM requires data exchange through TLM FIFOs to maintain synchronization across threads. [data_exchange_via_tlm_fifos]
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