[Bloat] Linux network is damn fast, need more use XDP (Was: DC behaviors today)

2017-12-04 Thread Jesper Dangaard Brouer
On Sun, 03 Dec 2017 20:19:33 -0800 Dave Taht wrote: > Changing the topic, adding bloat. Adding netdev, and also adjust the topic to be a rant on that the Linux kernel network stack is actually damn fast, and if you need something faster then XDP can solved your needs... > Joel Wirāmu Pauling

Re: [Bloat] Linux network is damn fast, need more use XDP (Was: DC behaviors today)

2017-12-04 Thread Dave Taht
Jesper: I have a tendency to deal with netdev by itself and never cross post there, as the bufferbloat.net servers (primarily to combat spam) mandate starttls and vger doesn't support it at all, thus leading to raising davem blood pressure which I'd rather not do. But moving on... On Mon, Dec 4,

Re: [Bloat] Linux network is damn fast, need more use XDP (Was: DC behaviors today)

2017-12-04 Thread Matthias Tafelmeier
Hello, > Scaling up to more CPUs and TCP-stream, Tariq[1] and I have showed the > Linux kernel network stack scales to 94Gbit/s (linerate minus overhead). > But when the drivers page-recycler fails, we hit bottlenecks in the > page-allocator, that cause negative scaling to around 43Gbit/s. > > [1]

Re: [Bloat] Linux network is damn fast, need more use XDP (Was: DC behaviors today)

2017-12-04 Thread Joel Wirāmu Pauling
On 5 December 2017 at 06:00, Dave Taht wrote: >>> The route table lookup also really expensive on the main cpu. > > To clarify the context here, I was asking specifically if the X5 mellonox card > did routing table offlload or only switching. > To clarify what I know the X5 using it's smart offlo

Re: [Bloat] Linux network is damn fast, need more use XDP (Was: DC behaviors today)

2017-12-07 Thread Jesper Dangaard Brouer
On Mon, 4 Dec 2017 09:00:41 -0800 Dave Taht wrote: > Jesper: > > I have a tendency to deal with netdev by itself and never cross post > there, as the bufferbloat.net servers (primarily to combat spam) > mandate starttls and vger doesn't support it at all, thus leading to > raising davem blood pr

Re: [Bloat] Linux network is damn fast, need more use XDP (Was: DC behaviors today)

2017-12-07 Thread Jesper Dangaard Brouer
(Removed netdev list) On Mon, 4 Dec 2017 09:00:41 -0800 Dave Taht wrote: > > If you have not heard, the netdev-community have worked on something > > called XDP (eXpress Data Path). This is a new layer in the network > > stack, that basically operates a the same "layer"/level as DPDK. > > Thus,