Date: Fri, 18 Oct 2024 07:28:49 -0400 From: Cheng Cui <cc@freebsd.org> To: void <void@f-m.fm> Cc: freebsd-net@freebsd.org Subject: Re: Performance issues with vnet jails + epair + bridge Message-ID: <CAGaXuiJW5QW1eFqjXtSO%2BojOX5G12B56%2BnzE9zaVR7nB33VjWA@mail.gmail.com> In-Reply-To: <ZxEqfISBJIW75p_P@vm2> References: <20240912181618.7895d10ad5ff2ebae9883192@gmail.com> <Zw3YGPIBC_s-q-Vg@vm2> <Zw3dlDuaSXsIG-yX@vm2> <CAGaXuiLG4Qv2KgDtJveN3adLh6b8tEzC4j6OYfLo1_dj8BKZWQ@mail.gmail.com> <Zw_6SNSEW5mXMy_I@vm2> <CAGaXuiL_Fk=_FtU23RoJBP0WguU8_-y3Tb1iZ=T2unVv-2aRpA@mail.gmail.com> <ZxDdnSngi13UyZSL@vm2> <CAGaXuiK52ufOs-eVfKHAYpGxRyGfCMpbbZy4GcShybTzHcjDGg@mail.gmail.com> <ZxEqfISBJIW75p_P@vm2>
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--00000000000092a3510624be9dbd Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, Oct 17, 2024 at 11:17=E2=80=AFAM void <void@f-m.fm> wrote: > On Thu, Oct 17, 2024 at 11:08:27AM -0400, Cheng Cui wrote: > >The patch has no effect at the host if the host is a data receiver. > > In this context, the vms being tested are on a bhyve host. > > Is the host a data sender, because the tap interfaces are bridged with bg= e0 > on the host. Or is the host a data receiver, because data goes tapN =3D> > bge0 and > then goes on to the iperf3 destination? > > The iperf3 destination was always a different physical machine, stable/14 > -- > > The patch is a TCP congestion control algorithm improvement. So to be clear, it only impacts a TCP data sender. These hosts are just traffic forwarders, not TCP sender/receiver. I can send you a patch for the FreeBSD 14/stable to test performance improvement. If you think FreeBSD 14.x releases are critical to your business, or you can't wait until FreeBSD 15 is released, you can file a request to add this patch in the 14.x. I think https://bugs.freebsd.org/bugzilla/ is where a user can file such request. If it is approved, which I am not sure if it can be approved, then maybe it can be included in the next 14.x release. --=20 Best Regards, Cheng Cui --00000000000092a3510624be9dbd Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div dir=3D"ltr">On Thu, Oct 17, 2024 at 11:17=E2=80=AFAM = void <<a href=3D"mailto:void@f-m.fm">void@f-m.fm</a>> wrote:<br></div= ><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"marg= in:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-l= eft-color:rgb(204,204,204);padding-left:1ex">On Thu, Oct 17, 2024 at 11:08:= 27AM -0400, Cheng Cui wrote:<br> >The patch has no effect at the host if the host is a data receiver.<br> <br> In this context, the vms being tested are on a bhyve host.<br> <br> Is the host a data sender, because the tap interfaces are bridged with bge0= <br> on the host. Or is the host a data receiver, because data goes tapN =3D>= bge0 and<br> then goes on to the iperf3 destination?<br> <br> The iperf3 destination was always a different physical machine, stable/14<b= r> -- <br> <br> </blockquote></div>The patch is a TCP congestion control algorithm improvem= ent. So to be=C2=A0clear,<div>it only impacts a TCP data sender. These host= s are just traffic forwarders,=C2=A0not</div><div>TCP sender/receiver.</div= ><div><br></div><div><div>I can send you a patch for the FreeBSD 14/stable = to test performance</div><div>improvement.</div></div><div><br></div><div>I= f you think FreeBSD 14.x releases are critical to your business, or you can= 't</div><div>wait until=C2=A0FreeBSD 15 is released, you can file a req= uest to add this patch in</div><div>the 14.x. I think=C2=A0<a href=3D"https= ://bugs.freebsd.org/bugzilla/">https://bugs.freebsd.org/bugzilla/</a>; is wh= ere a user can file such</div><div>request. If it is approved, which I am n= ot sure if it can be approved, =C2=A0then maybe</div><div>it can be include= d in the next 14.x release.</div><div><div><br></div><span class=3D"gmail_s= ignature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_signature"><= div dir=3D"ltr"><div></div>Best Regards,<div>Cheng Cui</div></div></div></d= iv></div> --00000000000092a3510624be9dbd--
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