Plus... The default weight based routing selects the free VC. If so, then why I need to do the VC partitioning as you mentioned in the Torus network.
*VC Selection (VS)*: The winner of SA selects a free VC (if HEAD/HEAD_TAIL flit) from its output port. I think this is a very important issue for all the users of garnet 2,0. I would like to solve this. Thanks again. Faisal On Mon, Jul 24, 2017 at 11:21 PM, F. A. Faisal <dipu.7...@gmail.com> wrote: > Thanks a lot for reply. > > This is little bit terrible news for me. > > However, as far I know garnet1.0 don't have the deadlock issue with Torus. > Please let me know how can I implement a VC partitioning scheme. Is it > possible? > > I can configure the routing algorithm with particular channel selection, > but I have no idea of VC partitioning in gem5. > > Please help me. > > Thanks again. > > Faisal > > > On Mon, Jul 24, 2017 at 10:33 PM, Krishna, Tushar <tus...@ece.gatech.edu> > wrote: > >> Hi Faisal, >> The Torus topology deadlocks as it has rings in each dimension unless one >> implements a VC partitioning scheme or bubble flow control. That's why I >> removed torus from the default topologies provided by garnet2.0. If you >> implement torus, you will have to implement deadlock freedom. >> >> Cheers, >> Tushar >> >> >> On Jul , 2017, at 5:56 PM, F. A. Faisal <dipu.7...@gmail.com> wrote: >> >> Dear All, >> >> I like to simulate the synthetic traffic analysis for Torus for 256 nodes >> with uniform traffic. >> However, the network is showing latency degradation after 0.14 injection >> rate (flit latency = 33.044985 for 0.14 and flit latency = 38.244770 for >> 0.13 ), which could be the possible case of network deadlocked. >> I configured the garnet 2.0 with all the default settings (4 vc + 16 >> bandwith factor) and Mesh network is also performing properly. As the >> number of VC is 4, Torus should not be in a deadlock. >> >> I also like to share the network file as attachment. >> And please consider the simulation condition as below- >> >> ./build/Garnet_standalone/gem5.debug configs.py/example/garnet_synt >> h_traffic --num-cpus=256 --num-dirs=256 --network=garnet2.0 >> --topology=Torus_XY --mesh-rows=16 --sim-cycles=20000 >> --synthetic=uniform_random --injectionrate=0.14 --routing-algorithm=0 -- >> vcs-per-vnet=4 >> >> >> Please let me know how to resolve this issue for Garnet 2.0. >> >> >> Thanks and best regards, >> >> >> F.A. Faisal >> >> <Torus_XY.py> >> >> _______________________________________________ >> gem5-users mailing list >> gem5-users@gem5.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> >> >> _______________________________________________ >> gem5-users mailing list >> gem5-users@gem5.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > >
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