[Users] Torus2q routing engine and vlarb weight choise

[Hal Rosenstock]

On links between end ports and peer switch, only 2 VLs max are needed
(depending on whether 1 or 2 QoS levels are in use). Interswitch links
require 4 VLs per QoS level.

With the config you are using, t2q is only warning that resources (buffers)
are being wasted on unused VLs. It's up to you whether to do more config of
QoS to get better buffer use and eliminate this warning message.

On Thu, Aug 4, 2016 at 12:09 PM, B S <black.s52 at yandex.com> wrote:

> Hello all
> I can't understand some torus2q options.May be anybody explain me ?
> In the Internet I found some options for torus
>
> qos_max_vls 8       # its clear for use 8 vl
> qos_high_limit 0.   # its cleasr for processing only 1 message in high
> table
> qos_vlarb_low 0:4,1:4,2:0,3:0,5:0,6:0,7:0
> qos_vlarb_high 0:4,1:0,2:0,3:0,4:0,5:0,6:0,7:0
>
> If I leave this options by default, opensm get warning
> "Warning: torus-2QoS recommends 0 VLarb weights
> for VLs 2-7 on endpoint links; not true ..."
>
> Sorry for more questions. I can't found answer in internet.
>
> 1) Why I can't leave this tables ( vlarb_high, vlarb_low) by default ? Who
> in routing engine torus2q and how  use this table ?
> 2) Why used only vl0 and vl1. In manual about Torus2q use 0-3 and 4-7 VLs ?
> 3) I can't understand why used weight 4 but not for example 64 or 255 ?
> 4) Why I should write this table for extended ca, swe, etc. separately
>
> May be somebody have links about this theme ?
> Thanks for you interest and time
>
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