Hi, I am trying to increase the number of received flits and packets in the garnet network. I first ran this simulation which uses uniform-random synthetic traffic: ============================================= build/NULL/gem5.opt configs/example/garnet_synth_traffic.py --network=garnet --num-cpus=64 --num-dirs=64 --topology=Mesh_XY --mesh-rows=8 --sim-cycles=100000 --synthetic=uniform_random --precision=3 --injectionrate=0.15 --router-latency=1 --link-latency=1 --vcs-per-vnet=4 --link-width-bits=64 --routing-algorithm=0 ============================================= In this simulation, approximately 80% of flits (1774 out of 2218) and 86% of the packets (1356 out of 1578) were successfully received. Increasing VCs from 4 to 6 yielded minimal improvement (less than 1% increase in received flits, 1.2% increase in received packets).
Assuming the contention was the main reason behind lost flits and packets, I reduced the injection rate significantly from 0.15 to 0.04. But this made things worse. Only 72.6% of flits (768 out of 1058) and 80.56% of packets (369 out of 458) were received successfully. Why does reducing the injection rate lead to fewer received flits and packets? How can we effectively enhance reception in the Garnet network? Kind regards, Ali
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