From nobody Thu Nov 16 16:50:27 2023 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4SWQyT3kn0z50rkG for ; Thu, 16 Nov 2023 16:50:41 +0000 (UTC) (envelope-from zarychtam@plan-b.pwste.edu.pl) Received: from plan-b.pwste.edu.pl (plan-b.pwste.edu.pl [IPv6:2001:678:618::40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "plan-b.pwste.edu.pl", Issuer "GEANT OV RSA CA 4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4SWQyS27n6z3HKp for ; Thu, 16 Nov 2023 16:50:39 +0000 (UTC) (envelope-from zarychtam@plan-b.pwste.edu.pl) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=plan-b.pwste.edu.pl header.s=plan-b-mailer header.b=j9PRLc1X; spf=none (mx1.freebsd.org: domain of zarychtam@plan-b.pwste.edu.pl has no SPF policy when checking 2001:678:618::40) smtp.mailfrom=zarychtam@plan-b.pwste.edu.pl; 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boundary="------------SPA0eaGCKAFQsaHKAxSFlbVA" Message-ID: Date: Thu, 16 Nov 2023 17:50:27 +0100 List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Request for Testing: TCP RACK Content-Language: en-US To: freebsd-current@freebsd.org References: <42C327BD-6CE4-43AA-A1AE-3BEC08D623DB@freebsd.org> From: Marek Zarychta Autocrypt: addr=zarychtam@plan-b.pwste.edu.pl; keydata= xsBNBFfi3cMBCADLecMTFXad4uDXqv3eRuB4qJJ8G9tzzFezeRnnwxOsPdytW5ES2z1ibSrR IsiImx6+PTqrAmXpTInxAi7yiZGdSiONRI4CCxKY9d1YFiNYT/2WyNXCekm9x29YeIU7x0JB Llbz0f/9HC+styBIu2H+PY/X98Clzm110CS+n/b9l1AtiGxTiVFj7/uavYAKxH6LNWnbkuc5 v8EVNc7NkEcl5h7Z9X5NEtzDxTOiBIFQ/kOT7LAtkYUPo1lqLeOM2DtWSXTXQgXl0zJI4iP1 OAu4qQYm2nXwq4b2AH9peknelvnt1mpfgDCGSKnhc26q6ibTfMwydp+tvUtQIQYpA6b9ABEB AAHNN01hcmVrIFphcnljaHRhIChQbGFuLWIpIDx6YXJ5Y2h0YW1AcGxhbi1iLnB3c3RlLmVk dS5wbD7CwHcEEwEIACEFAlfi4LkCGwMFCwkIBwIGFQgJCgsCBBYCAwECHgECF4AACgkQHZW8 vIFppoJXdgf8D9X3VRFSNaR9lthSx/+uqas17J3FJKBo1xMQsC2a+44vzNvYJSuPGLLJ+LW2 HPVazjP/BWZJbxOYpliY4zxNRU0YCp0BLIVLibc//yax+mE42FND/+NiIZhqJscl6MLPrSwo sIwXec4XYkldkyqW/xBbBYXoIkBqdKB9j5j42Npy1IV/RizOSdmvTWY27ir8e/yGMR1RLr4F 8P5K3OWTdlGy2H2F/3J8bIPBLG6FpaIyLQw4dHSx8V02PYqDxK1cNo2kAOnU8PnZL/AGuMOH iv3MN1VYL8ehcmpBBsrZGebQJxrjY2/5IaTSgp9xHYT70kshuU6Qb97vk1mOjNZxgc7ATQRX 4t3DAQgA10h6RCXuBLMHxq5B8X/ZIlj9sgLoeyfRdDZEc9rT2KUeUJVHDsbvOFf4/7F1ovWY hJbA6GK/LUZeHHTjnbZcH1uDYQeHly4UOLxeEvhGoz4JhS2C7JzN/uRnwbdOAUbJr8rUj/IY a7gk906rktsc/Ldrxrxh7O6WO0JCh2XO/p4pDfEwwB37g4xHprSab28ECYJ9JMbtA8Sy4M55 g3+GQ28FvSlGnx48OoGXU2BZdc1vZKSQmNOlikB+9/hDX8zdYWVfDaX1TLQ8Ib4+xTUmapza mV/bxIsaZRBw+jFjLQHhTbIMfPEU+4mxFDvTdbKPruKPqVf1ydgMnPZWngowdwARAQABwsBf BBgBCAAJBQJX4t3DAhsMAAoJEB2VvLyBaaaC6qkIAJs9sDPqrqW0bYoRfzY6XjDWQ59p9tJi v8aogxacQNCfAu+WkJ8PNVUtC1dlVcG5NnZ80gXzd1rc8ueIvXlvdanUt/jZd8jbb3gaDbK3 wh1yMCGBl/1fOJTyEGYv1CRojv97KK89KP5+r8x1P1iHcSrunlDNqGxTMydNCwBH23QcOM+m u4spKnJ/s0VRBkw3xoKBZfZza6fTQ4gTpAipjyk7ldOGBV+PvkKATdhK2yLwuWXhKbg/GRlD 1r5P0gxzSqfV4My+KJuc2EDcrqp1y0wOpE1m9iZqCcd0fup5f7HDsYlLWshr7NQl28f6+fQb sylq/j672BHXsdeqf/Ip9V4= In-Reply-To: <42C327BD-6CE4-43AA-A1AE-3BEC08D623DB@freebsd.org> X-Spamd-Result: default: False [-3.69 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-1.000]; DMARC_POLICY_ALLOW(-0.50)[plan-b.pwste.edu.pl,none]; R_DKIM_ALLOW(-0.20)[plan-b.pwste.edu.pl:s=plan-b-mailer]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; ONCE_RECEIVED(0.10)[]; XM_UA_NO_VERSION(0.01)[]; RCVD_TLS_ALL(0.00)[]; ASN(0.00)[asn:206006, ipnet:2001:678:618::/48, country:PL]; MIME_TRACE(0.00)[0:+,1:+,2:~]; MLMMJ_DEST(0.00)[freebsd-current@freebsd.org]; RCVD_COUNT_ONE(0.00)[1]; FROM_EQ_ENVFROM(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; ARC_NA(0.00)[]; DKIM_TRACE(0.00)[plan-b.pwste.edu.pl:+]; R_SPF_NA(0.00)[no SPF record]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TO_DN_NONE(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[] X-Rspamd-Queue-Id: 4SWQyS27n6z3HKp X-Spamd-Bar: --- This is a multi-part message in MIME format. --------------SPA0eaGCKAFQsaHKAxSFlbVA Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit W dniu 16.11.2023 o 10:13, tuexen@freebsd.org pisze: > 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 That's really good news and long-awaited change. Thank you. > 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. Yes, please do it, at least for CURRENT. Last problem I have spotted with RACK was fixed in June: it was missing support TCP-MD5: https://cgit.freebsd.org/src/commit/?id=02b885b09d1e90574162a1442b9ede06cef2b13a We switched to RACK since upgrading to early stable/13 and genuinely appreciate this gift from Netflix. The performance improvement is invaluable, both in a lossy LAN and on a long-haul overseas TCP connection. > Please let me know if you have any questions. Are any MFCs planned, especially to stable/14 ? Now, when stable/14 is almost in sync with main aka CURRENT it's an optimal time for such a MFC. When the change hits stable/14, it would be possible to test it extensively and have it fully functional in 14.1-RELEASE. Best regards -- Marek Zarychta --------------SPA0eaGCKAFQsaHKAxSFlbVA Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
W dniu 16.11.2023 o 10:13, tuexen@freebsd.org pisze:
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
That's really good news and long-awaited change. Thank you. 
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.

Yes, please do it, at least for CURRENT. Last problem I have spotted with RACK was fixed in June: it was missing support TCP-MD5:

https://cgit.freebsd.org/src/commit/?id=02b885b09d1e90574162a1442b9ede06cef2b13a

We switched to RACK since upgrading to early stable/13 and genuinely appreciate this gift from Netflix. The performance improvement is invaluable, both in a lossy LAN and on a long-haul overseas TCP connection. 

Please let me know if you have any questions.

Are any MFCs planned, especially to stable/14 ? Now, when stable/14 is almost in sync with main aka CURRENT it's an optimal time for such a MFC. When the change hits stable/14, it would be possible to test it extensively and have it fully functional in 14.1-RELEASE.

Best regards

-- 
Marek Zarychta
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