From nobody Mon Mar 18 12:33:11 2024 X-Original-To: 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 4TyvQm4QVqz5Df6m for ; Mon, 18 Mar 2024 12:33:20 +0000 (UTC) (envelope-from david@catwhisker.org) Received: from mx.catwhisker.org (mx.catwhisker.org [107.204.234.170]) (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 did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4TyvQm12TMz4DBX; Mon, 18 Mar 2024 12:33:19 +0000 (UTC) (envelope-from david@catwhisker.org) Authentication-Results: mx1.freebsd.org; none Received: from albert.catwhisker.org (localhost [127.0.0.1]) by albert.catwhisker.org (8.18.1/8.18.1) with ESMTP id 42ICXBeq020711; Mon, 18 Mar 2024 12:33:11 GMT (envelope-from david@albert.catwhisker.org) Received: (from david@localhost) by albert.catwhisker.org (8.18.1/8.18.1/Submit) id 42ICXBW3020710; Mon, 18 Mar 2024 05:33:11 -0700 (PDT) (envelope-from david) Date: Mon, 18 Mar 2024 05:33:11 -0700 From: David Wolfskill To: Mike Karels Cc: tuexen@freebsd.org, Nuno Teixeira , Drew Gallatin , garyj@gmx.de, current@freebsd.org, net@freebsd.org, Randall Stewart Subject: Re: Request for Testing: TCP RACK Message-ID: Mail-Followup-To: David Wolfskill , Mike Karels , tuexen@freebsd.org, Nuno Teixeira , Drew Gallatin , garyj@gmx.de, current@freebsd.org, net@freebsd.org, Randall Stewart References: <4FF534F6-B35D-4596-8D1E-226AD1347AC8@freebsd.org> <6e795e9c-8de4-4e02-9a96-8fabfaa4e66f@app.fastmail.com> <6047C8EF-B1B0-4286-93FA-AA38F8A18656@karels.net> 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 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="ZW+1ZJTfz339vpLs" Content-Disposition: inline In-Reply-To: <6047C8EF-B1B0-4286-93FA-AA38F8A18656@karels.net> X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:7018, ipnet:107.192.0.0/12, country:US] X-Rspamd-Queue-Id: 4TyvQm12TMz4DBX --ZW+1ZJTfz339vpLs Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Mar 18, 2024 at 07:26:10AM -0500, Mike Karels wrote: > ... > >> It would be so nice that we can have a sysctl tunnable for this patch > >> so we could do more tests without recompiling kernel. > > Thanks for testing! > > > > @gallatin: can you come up with a patch that is acceptable for Netflix > > and allows to mitigate the performance regression. >=20 > Ideally, tcphpts could enable this automatically when it starts to be > used (enough?), but a sysctl could select auto/on/off. >=20 > Mike > .... Or (at some risk of over-{complicat,engineer}ing things), perhaps sysctl/tunable for high- and low-water marks? Peace, david (who is quite unlikely to be writing the code, so "grain of salt") --=20 David H. Wolfskill david@catwhisker.org Alexey Navalny was a courageous man; Putin has made him a martyr. See https://www.catwhisker.org/~david/publickey.gpg for my public key. --ZW+1ZJTfz339vpLs Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iNUEARYKAH0WIQSTLzOSbomIK53fjFliipiWhXYx5QUCZfg0hl8UgAAAAAAuAChp c3N1ZXItZnByQG5vdGF0aW9ucy5vcGVucGdwLmZpZnRoaG9yc2VtYW4ubmV0OTMy RjMzOTI2RTg5ODgyQjlEREY4QzU5NjI4QTk4OTY4NTc2MzFFNQAKCRBiipiWhXYx 5VO3AQDpWSTmo4IwVnPuV8nRxio+oU11e/Q4gNJwn2l73ZZeYgD/V6UxqL1hl7f3 mgPM5118Xkj38cZmGpAsWhb9sZEWEwI= =Y8dn -----END PGP SIGNATURE----- --ZW+1ZJTfz339vpLs--