Linux 6.3 Introduces IPv4 "BIG TCP" To Improve High Speed Network Performance

[NobodyXu]

Unless Linux can encrypt traffic as FreeBSD does (in-kernel TLS encryption with TLS hardware offload), gonna be tough. Unencrypted traffic may get there tho

There's kTLS in Linux for encrypting TLS in kernel or even offload them to dedicated hardware like the ethernet card if possible.

[Volta]

Networking performance between FreeBSD which claims to have the fastest stack vs Linux 6.3 once stable in 8 weeks would be cool! Have to be a production FreeBSD with debugging turned off for a fair comparison so maybe this summer once 14.0 comes out.

Their claims are very far from reality. Linux beat it years ago.

[aht0]

Their claims are very far from reality. Linux beat it years ago.

Gonna give solid source to back that claim up?
1TBb/s result would suffice

6.2 seems to have kTLS impl. indeed

[Volta]

Gonna give solid source to back that claim up?
1TBb/s result would suffice

Nothing for such results. Furthermore, I wasn't aware user space TCP stacks are ways faster than in kernel one, so my point doesn't make much a difference. Cloudflare is using Linux kernel TCP, but from reasons other than performance.

[aht0]

Nothing for such results. Furthermore, I wasn't aware user space TCP stacks are ways faster than in kernel one, so my point doesn't make much a difference. Cloudflare is using Linux kernel TCP, but from reasons other than performance.

Cant understand wdym. FreeBSD has network traffic encryption in kernel and follow-up hardware offload some years by now.

[lano1106]

Gonna give solid source to back that claim up?
1TBb/s result would suffice

6.2 seems to have kTLS impl. indeed

I have done some experimentation by combining io_uring multishot recvmsg with kTLS. My testing has shown that having openssl do the decryption was faster than using kTLS. Also, I have not pursue the kTLS testing but with 6.1 kernel, kTLS does have a bug (my guess is a memory leak) that leads to kernel panics after several hours of sustained kTLS usage...