On Fri, May 6, 2016 at 3:11 PM, Tom Herbert <t...@herbertland.com> wrote:
> This patch set:
> - Fixes GRE6 to process translate flags correctly from configuration
> - Adds support for GSO and GRO for ip6ip6 and ip4ip6
> - Add support for FOU and GUE in IPv6
> - Support GRE, ip6ip6 and ip4ip6 over FOU/GUE
> - Fixes ip6_input to deal with UDP encapsulations
> - Some other minor fixes
>
> v2:
> - Removed a check of GSO types in MPLS
> - Define GSO type SKB_GSO_IPXIP6 and SKB_GSO_IPXIP4 (based on input
> from Alexander)
> - Don't define GSO types specifally for IP6IP6 and IP4IP6, above
> fix makes that uncessary
> - Don't bother clearing encapsulation flag in UDP tunnel segment
> (another item suggested by Alexander).
>
> v3:
> - Address some minor comments from Alexander
>
> Tested:
> Tested a variety of case, but not the full matrix (which is quite
> large now). Most of the obivous cases (e.g. GRE) work fine. Still
> some issues probably with GSO/GRO being effective in all cases.
>
> - IPv4/GRE/GUE/IPv6 with RCO
> 1 TCP_STREAM
> 6616 Mbps
> 200 TCP_RR
> 1244043 tps
> 141/243/446 90/95/99% latencies
> 86.61% CPU utilization
> - IPv6/GRE/GUE/IPv6 with RCO
> 1 TCP_STREAM
> 6940 Mbps
> 200 TCP_RR
> 1270903 tps
> 138/236/440 90/95/99% latencies
> 87.51% CPU utilization
>
> - IP6IP6
> 1 TCP_STREAM
> 2576 Mbps
> 200 TCP_RR
> 498981 tps
> 388/498/631 90/95/99% latencies
> 19.75% CPU utilization (1 CPU saturated)
>
> - IP6IP6/GUE/IPv6 with RCO
> 1 TCP_STREAM
> 1854 Mbps
> 200 TCP_RR
> 1233818 tps
> 143/244/451 90/95/99% latencies
> 87.57 CPU utilization
>
> - IP4IP6
> 1 TCP_STREAM
> 200 TCP_RR
> 763774 tps
> 250/318/466 90/95/99% latencies
> 35.25% CPU utilization (1 CPU saturated)
>
> - GRE with keyid
> 200 TCP_RR
> 744173 tps
> 258/332/461 90/95/99% latencies
> 34.59% CPU utilization (1 CPU saturated)
So I tried testing your patch set and it looks like I cannot get GRE
working for any netperf test. If I pop the patches off it is even
worse since it looks like patch 3 fixes some tunnel flags issues, but
still doesn't resolve all the issues introduced with b05229f44228
("gre6: Cleanup GREv6 transmit path, call common GRE functions").
Reverting the entire patch seems to resolve the issues, but I will try
to pick it apart tonight to see if I can find the other issues that
weren't addressed in this patch series.
- Alex
