Hello. Does the latency shown in this figure mean that POPET's prediction takes 6/18 clock cycles?

[szuhzw]

[szuhzw]

HERMES_O = --config=$(HERMES_HOME)/config/hermes_base.ini --ddrp_req_latency=6
HERMES_P = --config=$(HERMES_HOME)/config/hermes_base.ini --ddrp_req_latency=18

What does ddrp_req_latency refer to? @rahulbera

[rahulbera]

It's not the latency of the prediction, but to issue the speculative request directly to the main memory controller from the core. In modern multi-core SoCs, even a request generated inside the core may take several cycles to travel to the main memory controller depending on the on-chip network/datapath design. Please refer to the end of Sec. 7.2 and Sec. 8.4.3 in the paper.