David Ahern

[David Ahern @dsahern]

@davem_dokebi @SHRIJEET2 has a perspective with comments on what it means for network design: https://t.co/CRClwFfNW6

[David Ahern @dsahern]

@atoonk So many questions… start with, AF_XDP on both ends ( post says packet generator)?

[Enfabrica @enfabrica_]

We are pleased to announce that we have joined the Ultra Ethernet Consortium (UEC)!

Come swing by our booth #586 at #SuperComputing to learn more!

https://t.co/1zGCwNEYRz

[netdevconf @netdev01]

CXL a new beggining according to @SHRIJEET2 @netdev01 0x17 #netdevconf

[netdevconf @netdev01]

Multiple round trips across the mem + PCI bus for data from/to GPU/SSD/Network are killing us in ML. Time to change how Linux handles it say Mina Almasry et al in this @netdev01 0x17 talk. Exciting times in Linux and the networking world!!!😹 https://t.co/LK59bWi7p1 #netdevconf

[netdevconf @netdev01]

How does CXL disaggregation of memory and compute play with networking? Put buffer and control state placement next to offload devices +IO and then merge IO + Compute expansion protocols. @SHRIJEET2 will leads the the CXL and networking BoF @netdev01 0x17. Join us!#netdevconf

[netdevconf @netdev01]

So your NIC hardware is not ready but you need to write the driver. Things that make you go hmmm.. 🤔......

Come and learn from @dsahern @netdev01 0x17 tutorial on how to deal with this https://t.co/fukrx5XdTY
#netdevconf

[Enfabrica @enfabrica_]

Courtesy of @Nasdaq - a live shot of Times Square just this past Friday!

To all our incredible employees, partners and investors, thank you for your role in getting @enfabrica_ to where we are today.

We couldn't do it without you and this is just the beginning!

[David Ahern @dsahern]

@NolanSIGBUS @networkservice @Ra1t0_Bezar1us Interesting, the repo was removed from github. I should have a clone somewhere...

[David Ahern @dsahern]

@networkservice @NolanSIGBUS @Ra1t0_Bezar1us BCM with switchdev - would love to see it. Having done something similar [1] to only a POC level I will say a $500k contract depends on the details. :-)
[1] https://t.co/b70ZHIuYee

[David Ahern @dsahern]

@vince2_ iperf3 and VM to VM would be 4 memcpy’s , so 16G sounds right.

[David Ahern @dsahern]

This Thursday, at netdev 0x16, I talk about how RDMA concepts can be used with socket based networking to achieve most of the properties needed to scale up to high flow rates (https://t.co/0rxe1unaO0).

[David Ahern @dsahern]

Last month at LPC,I talked about the scalability of the Linux networking stack and what S/W needs for a single flow to scale up as line rates increase (https://t.co/F9kpaXFuEo).

[netdevconf @netdev01]

You want high performance application networking? fuggedaboutit if you insist on using BSD socket API. @dsahern and @SHRIJEET2 have been in pursuit of perf happyness and in this @netdev01 0x16 they discuss how we get to the promised land #netdevconf
https://t.co/SLAy7Ms9Tl

[David Ahern @dsahern]

@blakedot_ @majek04 @networkservice There are a lot of permutations emphasizing how hard it is to cover all possible use cases. More tests can be added to cover your companies' needs so future changes do not cause breakage which takes years to discover.

[David Ahern @dsahern]

@blakedot_ @majek04 @networkservice Test cases are key. In 2018 my test suite was not in the kernel tree which is the back and forth on that set; it is now[1]. Some of those tests include address binding with and without VRF.
[1] https://t.co/2cv4E0yBXu

[David Ahern @dsahern]

@davekempe @toprankinrez @ValdikSS @majek04 I do not recall that OSS talk being recorded.

[David Ahern @dsahern]

@ValdikSS @toprankinrez @majek04 Linux VRF is implemented as policy routing. As such you must have a default route in the VRF table (your unreachable entry), and the fib rules need to be properly ordered (local rule moved below l3mdev). All of that is in the slide deck as well as troubleshooting lookups via perf

[David Ahern @dsahern]

@toprankinrez @ValdikSS @majek04 That URL is to Open Source Summit, North America, Sept 2017. The original Cumulus blog post does seem to have vanished after the nvidia acquisition.

[David Ahern @dsahern]

@ValdikSS @majek04 https://t.co/dH8xS1buCE, slide 44 and 45.