netdev - Re: Kernel 4.19 network performance - forwarding/routing normal users traffic

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Date:   Sun, 4 Nov 2018 01:24:03 +0100
From:   Paweł Staszewski <pstaszewski@...are.pl>
To:     David Ahern <dsahern@...il.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     netdev <netdev@...r.kernel.org>, Yoel Caspersen <yoel@...knet.dk>
Subject: Re: Kernel 4.19 network performance - forwarding/routing normal users
 traffic

n


W dniu 03.11.2018 o 18:32, David Ahern pisze:
> On 11/1/18 11:30 AM, Paweł Staszewski wrote:
>>>>>   
>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/samples/bpf/xdp_fwd_kern.c
>>>>>
>>>>>
>>>> I can try some tests on same hw but testlab configuration - will give it
>>>> a try :)
>>>>
>>> That version does not work with VLANs. I have patches for it but it
>>> needs a bit more work before sending out. Perhaps I can get back to it
>>> next week.
>>>
>> Will be nice - next week i will be able to replace network controller
>> and install separate two 100Gbit nics into two pciex x16 slots - so can
>> test without hitting pcie bandwidth limits.
>>
>>
> Does your setup have any other device types besides physical ports with
> VLANs (e.g., any macvlans or bonds)?
>
>
no.
just
phy(mlnx)->vlans only config

And today again after allpy patch for page allocator - reached again 
64/64 Gbit/s

with only 50-60% cpu load

today no slowpath hit for netwoking :)

But again dropped pckt at 64GbitRX and 64TX ....
And as it should not be pcie express limit  -i think something more is 
going on there - and hard to catch - cause perf top doestn chenged 
besides there is no queued slowpath hit now


I ordered now also intel cards to compare - but 3 weeks eta
Faster - cause 3 days - i will have mellanox connectx 5 - so can 
separate traffic to two different x16 pcie busses