Date: Mon, 18 Mar 2024 11:42:48 +0000 From: Nuno Teixeira <eduardo@freebsd.org> To: Drew Gallatin <gallatin@freebsd.org> Cc: tuexen@freebsd.org, garyj@gmx.de, current@freebsd.org, net@freebsd.org, Randall Stewart <rrs@freebsd.org> Subject: Re: Request for Testing: TCP RACK Message-ID: <CAFDf7UJq9SCnU-QYmS3t6EknP369w2LR0dNkQAc-NaRLvwVfoQ@mail.gmail.com> In-Reply-To: <CAFDf7UKDWSnhm%2BTwP=ZZ9dkk0jmAgjGKPLpkX-CKuw3yH233gQ@mail.gmail.com> References: <42C327BD-6CE4-43AA-A1AE-3BEC08D623DB@freebsd.org> <CAFDf7U%2BU3QpgsG-hY0u3tC_X9WKSRzuAM7Nfhzu-%2BqPBbs1nng@mail.gmail.com> <486915F0-456B-4B09-A8BC-93BBA79C4CA1@freebsd.org> <20240313080624.6c73908c@ernst.home> <508E3B47-8E1B-469F-97B1-2171A3098888@freebsd.org> <86a5n1i0xg.fsf@ltc.des.dev> <AE656D0C-FA5B-4194-8B57-4140CD57ABF1@freebsd.org> <CAFDf7UJRitdHz5QebNH9A4mNo0pKCBRfZCfmFgjNVSdCr_JXrw@mail.gmail.com> <78D1FF09-71A3-4486-B934-D8332F54B237@freebsd.org> <20240316104053.20bef8c2@ernst.home> <CAFDf7UKT=FYsaXRacwsnjDkYUjT4_1QnHynWAc67yxQS8XA0Yw@mail.gmail.com> <20240316115128.33d11f7b@ernst.home> <CAFDf7U%2BBgyw2e1hJySt-4GTX3=qn6LX7B2Ebzcmvr%2BD6MJqfpg@mail.gmail.com> <7367F29A-D52B-4828-B79A-AA2667E81E7D@freebsd.org> <CAFDf7UKRLpBt%2B11GmWO5p0b-L9ZMve6MyCxRUuVm32EBZY0MWA@mail.gmail.com> <BB57B7CC-1506-4B4C-8A04-26F67DE30EDA@freebsd.org> <CAFDf7ULtN9owoH-ns2OfR6ZhypNGxuNzkQbb2P9zR8ceFgaj5A@mail.gmail.com> <4FF534F6-B35D-4596-8D1E-226AD1347AC8@freebsd.org> <CAFDf7U%2BAjfeY%2Bqjq%2B-R71w5i1pRoxQdOmqJ9w4s1U13AA8-duA@mail.gmail.com> <C5D50314-4B0C-42F6-AA67-B5A32A4BA335@freebsd.org> <CAFDf7UKL6vtKo1Mn9Vw_5OD9Xubuw%2BdgS83WKwsiTUaXHs8D6Q@mail.gmail.com> <6e795e9c-8de4-4e02-9a96-8fabfaa4e66f@app.fastmail.com> <CAFDf7UKDWSnhm%2BTwP=ZZ9dkk0jmAgjGKPLpkX-CKuw3yH233gQ@mail.gmail.com>
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Hello all! It works just fine! System performance is OK. Using patch on main-n268841-b0aaf8beb126(-dirty). --- net.inet.tcp.functions_available: Stack D Alias PCB coun= t freebsd freebsd 0 rack * rack 38 --- 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 all! Really happy here :) Cheers, Nuno Teixeira <eduardo@freebsd.org> escreveu (domingo, 17/03/2024 =C3=A0(s)= 20:26): > > Hello, > > > I don't have the full context, but it seems like the complaint is a per= formance regression in bonnie++ and perhaps other things when tcp_hpts is l= oaded, even when it is not used. Is that correct? > > > > If so, I suspect its because we drive the tcp_hpts_softclock() routine = from userret(), in order to avoid tons of timer interrupts and context swit= ches. To test this theory, you could apply a patch like: > > It's affecting overall system performance, bonnie was just a way to > get some numbers to compare. > > Tomorrow I will test patch. > > Thanks! > > -- > Nuno Teixeira > FreeBSD Committer (ports) --=20 Nuno Teixeira FreeBSD Committer (ports)
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