Re: Request for Testing: TCP RACK

Am 2023-11-17 14:29, schrieb void:
> On Thu, Nov 16, 2023 at 10:13:05AM +0100, tuexen@freebsd.org wrote:
> 
>> You can load the kernel module using
>> kldload tcp_rack
>> 
>> You can make the RACK stack the default stack using
>> sysctl net.inet.tcp.functions_default=rack
> 
> Hi, thank you for this.
> 
> https://klarasystems.com/articles/using-the-freebsd-rack-tcp-stack/ 
> mentions
> this needs to be set in /etc/src.conf :
> 
> WITH_EXTRA_TCP_STACKS=1
> 
> Is this still the case? Context here is -current both in a vm and bare
> metal, on various machines, on various connections, from DSL to 10Gb.

On a recent -current: this is not needed anymore, it is part of the 
defaults now. But you may still compile the kernel with "option TCPHPTS" 
(until it's added to the defaults too).

> Is there a method (yet) for enabling this functionality in various 
> -RELENG
> maybe where one can compile in a vm built for that purpose, then
> transferring to the production vm?

Copy the kernel which was build according to the acticle from klara 
systems to your target VM.

> Would it be expected to work on arm64?

Yes (I use it on an ampere VM in the cloud).

Bye,
Alexander.

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