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

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

Re: [Bloat] [Cerowrt-devel] DC behaviors today

Do you think that "RTT to San Francisco" is a clear enough, predictable enough measure that we can use it in the context of non-technical users and obfuscating salescritters? --dave who vaguely watched RTT to Charlottetown PEI, Vancouver and Washington DC in a previous life On 04/12/17

Re: [Bloat] [Cerowrt-devel] DC behaviors today

I suggest we stop talking about throughput, which has been the mistaken idea about networking for 30-40 years. Almost all networking ends up being about end-to-end response time in a multiplexed system. Or put another way: "It's the Latency, Stupid". I get (and have come to expect) 27

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

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] [Make-wifi-fast] benefits of ack filtering

On 04/12/17 10:44 AM, Juliusz Chroboczek wrote: In a previous life I did some work on the optimization (by remote proxying) of the SMB protocol used by Samba [...] Eventually we said the heck with it, and sat Samba on top of a different protocol entirely, The audience are waiting with held

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

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

Re: [Bloat] [Make-wifi-fast] benefits of ack filtering

> In a previous life I did some work on the optimization (by remote > proxying) of the SMB protocol used by Samba [...] Eventually we said > the heck with it, and sat Samba on top of a different protocol entirely, The audience are waiting with held breath for more details. -- Juliusz

Re: [Bloat] [Make-wifi-fast] benefits of ack filtering

On 03/12/17 10:44 PM, Dave Taht wrote: More generally, the case where you have a queue containing acks, stored up for whatever reason (congestion, media access, asymmetry), is a chance for a middlebox or host to do something "smarter" to thin them out. Acks don't respond to conventional

[Bloat] Benefits of Asymmetric links

Hi folks, Just to inject a touch of reality into the discussion... > On Dec 3, 2017, at 10:44 PM, bloat-requ...@lists.bufferbloat.net wrote: > >> I can buy 300/10 megabit/s access from my cable provider. > > Don't! It would be wonderful to get a fast, symmetric link from my ISP, but here's

Re: [Bloat] [Cerowrt-devel] DC behaviors today

On Mon, 4 Dec 2017, Pedro Tumusok wrote: Looking at chipsets coming/just arrived from the chipset vendors, I think we will see CPE with 10G SFP+ and 802.11ax Q3/Q4 this year. Price is of course a bit steeper than the 15USD USB DSL modem :P, but probably fits nicely for the SMB segment.

Re: [Bloat] [Cerowrt-devel] DC behaviors today

On Mon, 4 Dec 2017, Joel Wirāmu Pauling wrote: How to deliver a switch, when the wiring and port standard isn't actually workable? Not workable? 10GBase-T is out of Voltage Spec with SFP+ ; you can get copper SFP+ Yep, the "Cu SFP" was a luxury for a while. Physics is harsh mistress

Re: [Bloat] [Cerowrt-devel] DC behaviors today

Oh we have these in the Enterprise segment already. The main use case is VNF on edge device for SDN applications right now. But even so the range of vendors/devices is pretty limited. On 4 December 2017 at 23:57, Pedro Tumusok wrote: > Looking at chipsets coming/just

Re: [Bloat] [Cerowrt-devel] DC behaviors today

Looking at chipsets coming/just arrived from the chipset vendors, I think we will see CPE with 10G SFP+ and 802.11ax Q3/Q4 this year. Price is of course a bit steeper than the 15USD USB DSL modem :P, but probably fits nicely for the SMB segment. Pedro On Mon, Dec 4, 2017 at 11:47 AM, Joel Wirāmu

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

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

Re: [Bloat] [Cerowrt-devel] DC behaviors today

Bingo; that's definitely step one - gateways capable of 10gbit becoming the norm. On 4 December 2017 at 23:43, Pedro Tumusok wrote: > For in home or even SMB, I doubt that 10G to the user PC is the main use > case. > Its having the uplink capable of support of more

Re: [Bloat] [Cerowrt-devel] DC behaviors today

For in home or even SMB, I doubt that 10G to the user PC is the main use case. Its having the uplink capable of support of more than1G, that 1G does not necessarily need to be generated by only one host on the LAN. Pedro On Mon, Dec 4, 2017 at 11:27 AM, Joel Wirāmu Pauling

Re: [Bloat] [Cerowrt-devel] DC behaviors today

How to deliver a switch, when the wiring and port standard isn't actually workable? 10GBase-T is out of Voltage Spec with SFP+ ; you can get copper SFP+ but they are out of spec... 10GbaseT doesn't really work over Cat5e more than a couple of meters (if you are lucky) and even Cat6 is only rated

Re: [Bloat] [Cerowrt-devel] DC behaviors today

On Mon, 4 Dec 2017, Joel Wirāmu Pauling wrote: I'm not going to pretend that 1Gig isn't enough for most people. But I refuse to believe it's the networks equivalent of a 10A power (20A depending on where you live in the world) AC residential phase distribution circuit. That's a good analogy.

Re: [Bloat] [Cerowrt-devel] DC behaviors today

I'm not going to pretend that 1Gig isn't enough for most people. But I refuse to believe it's the networks equivalent of a 10A power (20A depending on where you live in the world) AC residential phase distribution circuit. This isn't a question about what people need, it's more about what the

Re: [Bloat] [Cerowrt-devel] DC behaviors today

On Sun, 3 Dec 2017, Dave Taht wrote: What Jesper's been working on for ages has been to try and get linux's PPS up for small packets, which last I heard was hovering at about 4Gbits. You might want to look into what the VPP (https://fd.io/) peeps are doing. They can at least forward packets