[ofa-general] [PATCH RFCv2 1/2] RDMA: Add protocol statistics attributes to the RDMA sysfs.

[Caitlin Bestler]

On Thu, Jun 19, 2008 at 8:16 AM, Roland Dreier <rdreier at cisco.com> wrote:
>  > The "Retransmission count" is per netdev and we support multiple netdev
>  > per physical port.  We have designed our silicon to support stats at
>  > netdev level and it doesn't make sense for us to aggregate stats from
>  > all netdevs and report at a device level.  Perhaps we can compromise,
>  > Chelsio can give device level stats at /sys/class/infiniband/$device and
>  > for NetEffect, we can provide netdev level stats below it?
>
> Hmm, kind of a mess if we can't achieve some uniformity...
>
> how do you handle stats if I change routing so an offloaded connection
> goes from physical port 1 to physical port 2?  Or presumably you have
> support for port aggregation in hardware so an offloaded connection can
> use both physical ports at the same time?
>
> Actually it seems that you attach a struct ib_device to each netdev (eg
> a two-port NIC gets two RDMA devices with iw_nes) so Steve's scheme
> should work fine for you too?  (I just looked on a system with a
> two-port NIC and I do see nes0 and nes1 devices)
>
>  - R.
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