Re: [Gems-users] Confused about latency in PRINT_TOPOLOGY

[Niket <niketa@xxxxxxxxxxxxx>]

As I said, this is really strange. The thing to do would be to look into 
the shortest path calculation in /network/simple/Topology.C and add a 
bunch of prints to confirm what is happening.
Niket

Hemayet Hossain wrote:
> Niket wrote:
> > This is strange.
> > I would say that you ensure whether this is the NUCA_ file that is being 
> > used. Sometimes one ends up providing different parameters.
> >   
> Do you mean whether this network file is used or not? I checked and 
> found this file is used for building the network. Do you see any other 
> way to mess it up?
> Thanks,
> Hemayet
>
>
>
> > Hemayet Hossain wrote:
> >   
> > > Hi,
> > > I am confused about the link latency printed. Can anyone please clarify 
> > > how the number is to interpret correctly? I am trying to set a file 
> > > specified network having 16 L1Cache controllers and  16 L2 cache 
> > > controllers connected by a 4x4 mesh (each switch is connected with 1 
> > > L1Cache and 1 L2Cache). The output wrt L1Cache-0 and portion of the 
> > > network file is given here.
> > >  From what I understand latency for L1Cache0-->L1Cache1is correct as 
> > > these two are connected through 2 intermediate switches (2 @ 1 per 
> > > switch) and 3 links (9 @ 3 per links). And so for L1Cache0-->L1Cache2 is 
> > > reasonable. If I apply same calculation then L1Cache0-->L1Cache3 should 
> > > have 19 but it is showing 15 (only possible if torus assumed but that is 
> > > not the case specified in network file).
> > > I really appreciate your reply.
> > > Thanks,
> > > Hemayet
> > >
> > >   L1Cache-0 Network Latencies
> > > -------------------------------------------------
> > >   L1Cache-0 -> L1Cache-1 net_lat: 11
> > >   L1Cache-0 -> L1Cache-2 net_lat: 15
> > >   L1Cache-0 -> L1Cache-3 net_lat: 15
> > >   L1Cache-0 -> L1Cache-4 net_lat: 11
> > >   L1Cache-0 -> L1Cache-5 net_lat: 15
> > >   L1Cache-0 -> L1Cache-6 net_lat: 15
> > >   L1Cache-0 -> L1Cache-7 net_lat: 15
> > >   L1Cache-0 -> L1Cache-8 net_lat: 15
> > >   L1Cache-0 -> L1Cache-9 net_lat: 15
> > >   L1Cache-0 -> L1Cache-10 net_lat: 15
> > >   L1Cache-0 -> L1Cache-11 net_lat: 15
> > >   L1Cache-0 -> L1Cache-12 net_lat: 15
> > >   L1Cache-0 -> L1Cache-13 net_lat: 15
> > >   L1Cache-0 -> L1Cache-14 net_lat: 15
> > >   L1Cache-0 -> L1Cache-15 net_lat: 15
> > >   L1Cache-0 -> L2Cache-0 net_lat: 7
> > >   L1Cache-0 -> L2Cache-1 net_lat: 11
> > >   L1Cache-0 -> L2Cache-2 net_lat: 15
> > >   L1Cache-0 -> L2Cache-3 net_lat: 15
> > >   L1Cache-0 -> L2Cache-4 net_lat: 11
> > >   L1Cache-0 -> L2Cache-5 net_lat: 15
> > >   L1Cache-0 -> L2Cache-6 net_lat: 15
> > >   L1Cache-0 -> L2Cache-7 net_lat: 15
> > >   L1Cache-0 -> L2Cache-8 net_lat: 15
> > >   L1Cache-0 -> L2Cache-9 net_lat: 15
> > >   L1Cache-0 -> L2Cache-10 net_lat: 15
> > >   L1Cache-0 -> L2Cache-11 net_lat: 15
> > >   L1Cache-0 -> L2Cache-12 net_lat: 15
> > >   L1Cache-0 -> L2Cache-13 net_lat: 15
> > >   L1Cache-0 -> L2Cache-14 net_lat: 15
> > >   L1Cache-0 -> L2Cache-15 net_lat: 15
> > >
> > > Network File
> > > ----------------------------------------
> > > ext_node:L1Cache:0 int_node:0 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:0 int_node:0 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:1 int_node:1 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:1 int_node:1 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:2 int_node:2 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:2 int_node:2 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:3 int_node:3 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:3 int_node:3 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:4 int_node:4 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:4 int_node:4 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:5 int_node:5 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:5 int_node:5 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:6 int_node:6 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:6 int_node:6 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:7 int_node:7 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:7 int_node:7 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:8 int_node:8 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:8 int_node:8 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:9 int_node:9 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:9 int_node:9 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:10 int_node:10 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:10 int_node:10 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:11 int_node:11 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:11 int_node:11 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:12 int_node:12 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:12 int_node:12 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:13 int_node:13 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:13 int_node:13 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:14 int_node:14 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:14 int_node:14 link_latency:3 bw_multiplier:16
> > >
> > > ext_node:L1Cache:15 int_node:15 link_latency:3 bw_multiplier:16
> > > ext_node:L2Cache:15 int_node:15 link_latency:3 bw_multiplier:16
> > >
> > >
> > > int_node:0 int_node:1 link_latency:3 bw_multiplier:16
> > > int_node:1 int_node:2 link_latency:3 bw_multiplier:16
> > > int_node:2 int_node:3 link_latency:3 bw_multiplier:16
> > >
> > > int_node:4 int_node:5 link_latency:3 bw_multiplier:16
> > > int_node:5 int_node:6 link_latency:3 bw_multiplier:16
> > > int_node:6 int_node:7 link_latency:3 bw_multiplier:16
> > >
> > > int_node:8 int_node:9 link_latency:3 bw_multiplier:16
> > > int_node:9 int_node:10 link_latency:3 bw_multiplier:16
> > > int_node:10 int_node:11 link_latency:3 bw_multiplier:16
> > >
> > > int_node:12 int_node:13 link_latency:3 bw_multiplier:16
> > > int_node:13 int_node:14 link_latency:3 bw_multiplier:16
> > > int_node:14 int_node:15 link_latency:3 bw_multiplier:16
> > >
> > >
> > > int_node:0 int_node:4 link_latency:3 bw_multiplier:16
> > > int_node:4 int_node:8 link_latency:3 bw_multiplier:16
> > > int_node:8 int_node:12 link_latency:3 bw_multiplier:16
> > >
> > > int_node:1 int_node:5 link_latency:3 bw_multiplier:16
> > > int_node:5 int_node:9 link_latency:3 bw_multiplier:16
> > > int_node:9 int_node:13 link_latency:3 bw_multiplier:16
> > >
> > > int_node:2 int_node:6 link_latency:3 bw_multiplier:16
> > > int_node:6 int_node:10 link_latency:3 bw_multiplier:16
> > > int_node:10 int_node:14 link_latency:3 bw_multiplier:16
> > >
> > > int_node:3 int_node:7 link_latency:3 bw_multiplier:16
> > > int_node:7 int_node:11 link_latency:3 bw_multiplier:16
> > > int_node:11 int_node:15 link_latency:3 bw_multiplier:16
> > >
> > >
> > >
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