Date: Mon, 14 Aug 2023 17:34:12 -0700 From: Kevin Bowling <kevin.bowling@kev009.com> To: "Greg 'groggy' Lehey" <grog@freebsd.org> Cc: current@freebsd.org Subject: Re: Potential show-stopper in em driver? Message-ID: <CAK7dMtB4%2BOgfXgYRa0x55RKu23TdsdE7UWFqa23bLY-Tv3SUkA@mail.gmail.com> In-Reply-To: <20230814234540.GG87066@eureka.lemis.com> References: <20230814124703.3875a7ba266cdf079525eb82@dec.sakura.ne.jp> <CAK7dMtC8Zrn=Bi3Xj2_boJ7PZG=sfPYcBTuy6Eq8OQmSahJ45w@mail.gmail.com> <20230814043746.GE87066@eureka.lemis.com> <CAK7dMtBr%2BqcPXugijWC8Pr96yuvnV5cSqTiAU47ygdTuxDmeVg@mail.gmail.com> <CAK7dMtAOVg%2B7aUBcC-ns-J0050KZ%2BanDDwHCM1a8hjkJK9iVBw@mail.gmail.com> <20230814234540.GG87066@eureka.lemis.com>
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On Mon, Aug 14, 2023 at 4:45=E2=80=AFPM Greg 'groggy' Lehey <grog@freebsd.o= rg> wrote: > > [moving to current as requested by bz@] > > On Monday, 14 August 2023 at 10:09:22 -0700, Kevin Bowling wrote: > > > > I'm able to replicate this on my I217 using iperf3. It happens > > quickly with flow control enabled (default) and takes about 15 minutes > > of line rate with flow control disabled. I am looking into the scope > > of the issue and will commit a fix or enable chicken bits for affected > > parts soon. > > Thanks. Let me know when you have something and I'll test it. I went ahead and reverted: 797e480cba8834e584062092c098e60956d28180 I thought I had a handle on the bug a few times but all I've managed to do is make it take a bit longer to stall so far. Whatever is going on is very subtle and may be outside the em_txrx.c code. > I'll reply to the other message later, but things look better without > TCO. I'm able to reproduce on my machine with the same NIC as yours so I no longer need the requested debugging info. > Greg > -- > Sent from my desktop computer. > See complete headers for address and phone numbers. > This message is digitally signed. If your Microsoft mail program > reports problems, please read http://lemis.com/broken-MUA.php
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