Date: Fri, 17 Nov 2023 00:08:58 +0100 From: tuexen@freebsd.org To: "Herbert J. Skuhra" <herbert@gojira.at> Cc: current@freebsd.org, net@freebsd.org Subject: Re: Request for Testing: TCP RACK Message-ID: <FFC68A43-5E6E-43A7-A3C6-39872195A3A1@freebsd.org> In-Reply-To: <87pm09ykb8.wl-herbert@gojira.at> References: <42C327BD-6CE4-43AA-A1AE-3BEC08D623DB@freebsd.org> <87pm09ykb8.wl-herbert@gojira.at>
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> On Nov 16, 2023, at 13:06, Herbert J. Skuhra <herbert@gojira.at> = wrote: >=20 > Hi, >=20 > On Thu, 16 Nov 2023 10:13:05 +0100, tuexen@freebsd.org wrote: >>=20 >> Dear all, >>=20 >> 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=3D3a338c534154164504005beb00a3c6fe= b03756cc >>=20 >> 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. >>=20 >> You can load the kernel module using >> kldload tcp_rack >>=20 >> You can make the RACK stack the default stack using >> sysctl net.inet.tcp.functions_default=3Drack >>=20 >> Based on the feedback we get, the default stack might be switched to = the >> RACK stack. >>=20 >> Please let me know if you have any questions. >=20 > I am running main-n266450-a592812327de with a GENERIC-NODEBUG kernel. >=20 > # kldload tcp_rack > kldload: an error occurred while loading module tcp_rack. Please check > dmesg(8) for more details. >=20 > 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 >=20 > So you have to build a kernel with "options TCPHPTS" first? Hi Herbert, yes this is correct. For whatever reason I was assuming the TCPHPTS is = already enabled in all configs, but this is not correct. Will put up an review to do this tomorrow. Thanks for reporting. Best regards Michael >=20 > -- > Herbert
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