[gem5-users] Re: Interface Message Buffers between the Network and the Ruby protocol

[gabriel.busnot--- via gem5-users]

VEDIKA JITENDRA KULKARNI wrote:
> Hi, thank you! So based on Dest NI it is decided that the packet is for 
> L1CACHE (0-15),
> L2CACHE(16-31) or DIRECTORY (32-47), and vnet(0,1,2) decides which queue, 
> right?

Correct.

> I also wanted to know how the route.dest_ni is used? I didn't come across 
> code where
> dest_ni is used at the destination router.
After a quick text search, RouteInfo::dest_ni is only used for debug printing.

Bust destID, to which this field is initialized to, is converted to MachineID 
to set personal_dest a few lines above.

> How is the NI decided once the tail flit reaches its destination router?

This I don't know for sure. I would suggest looking at 
RoutingUnit::outportCompute() and around.

> 
> Thank you,
> Vedika
> 
> Get Outlook for Android<https://aka.ms/AAb9ysg>
> 
> ________________________________
> From: gabriel.busnot--- via gem5-users &lt;gem5-users(a)gem5.org&gt;
> Sent: Wednesday, May 5, 2021 7:42:32 PM
> To: gem5-users(a)gem5.org &lt;gem5-users(a)gem5.org&gt;
> Cc: gabriel.busnot(a)arteris.com &lt;gabriel.busnot(a)arteris.com&gt;
> Subject: [gem5-users] Re: Interface Message Buffers between the Network and 
> the Ruby
> protocol
> 
> Hi,
> 
> This is based on the virtual network ID specified at the top of the machine 
> declaration
> with the MessageBuffer* declaration.
> E.g.: MessageBuffer * L1RequestToL2Cache, network="From",
> virtual_network="0", vnet_type="request";
> 
> Gabriel
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