Re: Request for Testing: TCP RACK

Hi,

On Thu, 16 Nov 2023 10:13:05 +0100, tuexen@freebsd.org wrote:
> 
> Dear all,
> 
> recently the main branch was changed to build the TCP RACK stack
> which is a loadable kernel module, by default:
> https://cgit.FreeBSD.org/src/commit/?id=3a338c534154164504005beb00a3c6feb03756cc
> 
> As discussed on the bi-weekly transport call, it would be great if people
> could test the RACK stack for their workload. Please report any problems to the
> net@ mailing list or open an issue in the bug tracker and drop me a note via email.
> This includes regressions in CPU usage, regressions in performance or any other
> unexpected change you observe.
> 
> 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
> 
> Based on the feedback we get, the default stack might be switched to the
> RACK stack.
> 
> Please let me know if you have any questions.

I am running main-n266450-a592812327de with a GENERIC-NODEBUG kernel.

# kldload tcp_rack
kldload: an error occurred while loading module tcp_rack. Please check
dmesg(8) for more details.

In dmesg:
KLD tcp_rack.ko: depends on tcphpts - not available or version mismatch
linker_load_file: /boot/kernel/tcp_rack.ko - unsupported file type

So you have to build a kernel with "options TCPHPTS" first?

--
Herbert