Date: Thu, 3 Aug 2023 17:17:47 -0700 From: Kevin Bowling <kevin.bowling@kev009.com> To: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: CFT: lem(4), em(4) e1000 Ethernet TSO testing Message-ID: <CAK7dMtDFXg_0NdafRdWgm92Sgx_%2BYi=PjsDsn6qqVEOM=ZPeoQ@mail.gmail.com> In-Reply-To: <CAK7dMtDrugPGtasdYi=U0gJ3P_6bfGyB5EXf2haY4gmHDuyAWA@mail.gmail.com> References: <CAK7dMtDrugPGtasdYi=U0gJ3P_6bfGyB5EXf2haY4gmHDuyAWA@mail.gmail.com>
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Committed as https://cgit.freebsd.org/src/commit/?id=3Df1b5488f7bba7f25a577= 50f87cbcbccbd5b9d16b On Tue, Jul 25, 2023 at 7:38=E2=80=AFPM Kevin Bowling <kevin.bowling@kev009= .com> wrote: > > Hi, > > I have been working through various bugs and have come to a point > where TSO is working on systems I have available for testing. > > This results in higher throughput on resource constrained systems, and > less CPU/power usage on unconstrained systems. > > As of this mail, you will need to manually apply > https://reviews.freebsd.org/D41170 on top of main to use TSO6 on > em(4). > > I plan to enable TSO by default for lem(4) and em(4) during the > FreeBSD 14 release cycle, so I would appreciate testing to address any > remaining issues. Below, a list of chipsets that will be exempt due > to known issues. > > lem(4) exclusions: > * <82544 (although it does seem ok to manually enable for emulations > in qemu, virtualbox, etc) > * 82547 > > em(4) exclusions.. These chips have a stability workaround for high > throughput with rapid link-flap applied that results in the TSO engine > not being able to run at line speed. Thus, TSO would not be enabled > by default here: > * Intel(R) I219-LM and I219-V > * Intel(R) I219-LM and I219-V (2) > * Intel(R) I219-LM and I219-V (3) > * Intel(R) I219-LM and I219-V (4) > * Intel(R) I219-LM and I219-V (5) > > Regards, > Kevin Bowling
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