Re: [Gems-users] link_latency Directory

[Greg Byrd <gbyrd@xxxxxxxx>]

I believe the intent is that the memory controllers (aka directories) 
are off-chip.  That's the reason for the increased latency.
...Greg


Jesús Camacho Villanueva wrote:
> Hi everybody,
> in 
> gems/ruby/network/simple/Network_Files/NUCA_Procs-16_ProcsPerChip-16_L2Banks-16_Memories-16.txt 
>
> the link_latency to access to each Directory (20 cycles) is 
> significantly higher than for example to access to L1/L2 Cache where 
> link_latency is only 1 cycle.
> I know that you can configure the file, but my answer is:
>
> Is realistic link_latency to access directory could be twenty times 
> higher than link_latency to access L1/L2 cache?
> Thanks,
> Jesús CV.
>
> processors:16
> procs_per_chip:16
> L2banks:16
> memories:16
>
> ext_node:L1Cache:0 int_node:0 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:1 int_node:1 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:2 int_node:2 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:3 int_node:3 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:4 int_node:4 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:5 int_node:5 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:6 int_node:6 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:7 int_node:7 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:8 int_node:8 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:9 int_node:9 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:10 int_node:10 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:11 int_node:11 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:12 int_node:12 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:13 int_node:13 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:14 int_node:14 link_latency:1 bw_multiplier:72
> ext_node:L1Cache:15 int_node:15 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:0 int_node:0 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:1 int_node:1 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:2 int_node:2 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:3 int_node:3 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:4 int_node:4 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:5 int_node:5 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:6 int_node:6 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:7 int_node:7 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:8 int_node:8 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:9 int_node:9 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:10 int_node:10 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:11 int_node:11 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:12 int_node:12 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:13 int_node:13 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:14 int_node:14 link_latency:1 bw_multiplier:72
> ext_node:L2Cache:15 int_node:15 link_latency:1 bw_multiplier:72
> ext_node:Directory:0 int_node:0 link_latency:20 bw_multiplier:80
> ext_node:Directory:1 int_node:1 link_latency:20 bw_multiplier:80
> ext_node:Directory:2 int_node:2 link_latency:20 bw_multiplier:80
> ext_node:Directory:3 int_node:3 link_latency:20 bw_multiplier:80
> ext_node:Directory:4 int_node:4 link_latency:20 bw_multiplier:80
> ext_node:Directory:5 int_node:5 link_latency:20 bw_multiplier:80
> ext_node:Directory:6 int_node:6 link_latency:20 bw_multiplier:80
> ext_node:Directory:7 int_node:7 link_latency:20 bw_multiplier:80
> ext_node:Directory:8 int_node:8 link_latency:20 bw_multiplier:80
> ext_node:Directory:9 int_node:9 link_latency:20 bw_multiplier:80
> ext_node:Directory:10 int_node:10 link_latency:20 bw_multiplier:80
> ext_node:Directory:11 int_node:11 link_latency:20 bw_multiplier:80
> ext_node:Directory:12 int_node:12 link_latency:20 bw_multiplier:80
> ext_node:Directory:13 int_node:13 link_latency:20 bw_multiplier:80
> ext_node:Directory:14 int_node:14 link_latency:20 bw_multiplier:80
> ext_node:Directory:15 int_node:15 link_latency:20 bw_multiplier:80
> int_node:0 int_node:1 link_latency:1 bw_multiplier:72
> int_node:1 int_node:2 link_latency:1 bw_multiplier:72
> int_node:2 int_node:3 link_latency:1 bw_multiplier:72
> int_node:0 int_node:4 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:1 int_node:5 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:2 int_node:6 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:3 int_node:7 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:4 int_node:5 link_latency:1 bw_multiplier:72
> int_node:5 int_node:6 link_latency:1 bw_multiplier:72
> int_node:6 int_node:7 link_latency:1 bw_multiplier:72
> int_node:4 int_node:8 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:5 int_node:9 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:6 int_node:10 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:7 int_node:11 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:8 int_node:9 link_latency:1 bw_multiplier:72
> int_node:9 int_node:10 link_latency:1 bw_multiplier:72
> int_node:10 int_node:11 link_latency:1 bw_multiplier:72
> int_node:8 int_node:12 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:9 int_node:13 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:10 int_node:14 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:11 int_node:15 link_latency:1 bw_multiplier:72 link_weight:2
> int_node:12 int_node:13 link_latency:1 bw_multiplier:72
> int_node:13 int_node:14 link_latency:1 bw_multiplier:72
> int_node:14 int_node:15 link_latency:1 bw_multiplier:72
>
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