Try with --inj-vnet=0 (ie single flit pavkets) and vcs-per-vnet=8 first (such that sufficient number of VCs) .. Before going to multi-flit packets (inj-vnet=2)
And then with multi-flit packets also try more VCs .. that may be the reason for lower throughput than you anticipate. From my recollection of garnet stats, you get about 0.4 flits/node/cycle of saturation throughput for 8x8 mesh (recall that theoretical max for 8x8 mesh is 0.5 flits/node/cycle) with single flit packets. Cheers, Tushar On Oct 11, 2024 at 1:56 PM -0400, Άγγελος Καβαλέρος via gem5-users <gem5-users@gem5.org>, wrote: Greetings dear gem5 Community, The problem I encounter is related with my inability to explain the output of the metrics that heterogarnet provided. The environment that I work in WSL(Windows Subsystem for Linux) from VSCode. step_1) As written clearly inside the: https://www.gem5.org/documentation/learning_gem5/part1/building/ using the command : python3 which scons build/NULL/gem5.opt -j3 step_2) and after that from : https://www.gem5.org/documentation/general_docs/ruby/garnet_synthetic_traffic/ using the following: scons defconfig build/NULL build_opts/NULL scons setconfig build/NULL RUBY_PROTOCOL_GARNET_STANDALONE=y scons build/NULL/gem5.debug step_3) and I also made some changes inside "/gem5/src/mem/ruby/network/garnet/GarnetNetwork.py" altering (the lines 47 and 48) buffers_per_data_vc and buffers_per_ctrl_vc to 8 before step_2, to change the data and ctrl buffer size. The environment is ready. Then with an automated script I run the command below with injection rate form 0.01 to 0.15 with packet length 1024 (the script stops when latency is above 100 cycles): ./build/NULL/gem5.debug configs/example/garnet_synth_traffic.py --num-cpus=64 --num-dirs=64 --network=garnet --topology=Mesh_XY --mesh-rows=8 --sim-cycles=100000000 --synthetic=uniform_random --inj-vne=2 --injectionrate=$injectionrate --router-latency=1 --link-latency=1 --vcs-per-vnet=1 --routing-algorithm=1 --sys-clock=1GHz --ruby-clock=1GHz --link-width-bits=1024 The problem is that for uniform random traffic in an 8x8 2D mesh with routing (XY) algorithm, the saturation throughput flits/node/cycle that i get is much less than the expected one from related papers ( my network has a congestion too early!). For example i have attached some pictures: Any commend would be quite helpful. I will also provide the metrics in excel for better understanding Thank you in advance! <Screenshot 2024-10-11 204829.png><Screenshot 2024-10-11 204757.png><Screenshot 2024-09-29 at 5.02.12 PM.png>
_______________________________________________ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org
