Re: extreme network latency

On Thu, Oct 20, 2016 at 2:22 AM, Richard Nyberg wrote: >> For better performance, you can put the if_emx_load="YES" in >> loader.conf. However, em0 will become emx0 after loading that module, >> so make sure that your rc.conf and pf.conf are also updated ;) > > It turned

Re: extreme network latency

> For better performance, you can put the if_emx_load="YES" in > loader.conf. However, em0 will become emx0 after loading that module, > so make sure that your rc.conf and pf.conf are also updated ;) It turned out hw.re.msi.enable="1" did not work so well. re0 simply stopped doing anything after

Re: extreme network latency

On Wed, Oct 19, 2016 at 2:19 AM, Richard Nyberg wrote: > Hi! Yes it's quite recent hardware. > > On 18 October 2016 at 04:20, Sepherosa Ziehau wrote: >> >> Heh, I'd say avoid re :). > > I might not have made the wisest choice there. :) > >> Try put the

Re: extreme network latency

Hi! Yes it's quite recent hardware. On 18 October 2016 at 04:20, Sepherosa Ziehau wrote: > > Heh, I'd say avoid re :). I might not have made the wisest choice there. :) > Try put the following tunable: > hw.re.msi.enable="1" > to /boot/loader.conf. And reboot. This also

Re: extreme network latency

On Tue, Oct 18, 2016 at 4:17 AM, Richard Nyberg wrote: > Yes, that was it. Many thanks! > > Should I just use polling, which works fine, or is there something one > can do about the interrupt issue? Heh, I'd say avoid re :). Try put the following tunable:

Re: extreme network latency

Our network dev Sephe might be able to work out why the NICs are interfering with each other, but it depends how old they are. If they are old card(s) and/or it is an old motherboard, it might not be worth tracking down. Polling is a perfectly acceptable solution for older stuff. If the NICs

Re: extreme network latency

Yes, that was it. Many thanks! Should I just use polling, which works fine, or is there something one can do about the interrupt issue? -Richard On 17 October 2016 at 22:05, Matthew Dillon wrote: > That kinda sounds like an interrupt issue, in which case I suggest turning

Re: extreme network latency

That kinda sounds like an interrupt issue, in which case I suggest turning polling on for both interfaces. ifconfig polling ought to do it. If that fixes the problem, then it is definitely interrupt-related. -Matt On Mon, Oct 17, 2016 at 12:52 PM, Richard Nyberg wrote:

Re: extreme network latency

Thanks again for your suggestions. Actually it's much stranger than I thought. While troubleshooting I had this configuration: df (em0) -> switch <- desktop No other devices or network interfaces were connected. In this configuration there was no problem at all with latency. I then plugged in

Re: extreme network latency

Look for a packet loop on the interface. Use tcpdump on the interface to see if there are excess packets being generated from somewhere. There are numerous things that can blow up a LAN. The most common being that a switch port is wired to loop back into the LAN. -Matt On Sun, Oct 16, 2016 at

Re: extreme network latency

On Sun, Oct 16, 2016 at 11:49 AM, Richard Nyberg wrote: > Thanks! > > Here are some more datapoints. I think the only constant at this point is the internal interface on the DragonFly system. If you hook the em0 interface that's currently internal on the DragonFly machine

Re: extreme network latency

Thanks! Here are some more datapoints. Yeah the switch for the lan is a simple Netgear GS105. My previous df gateway was connected in the same way, also with an internal em0, Turning pf off does not help. Switching cable and port between df and the switch does not help. Pinging www.google.com

Re: extreme network latency

This is a problem that's going to require more data. - If you turn pf off, does the problem go away? - If you ping from the DragonFly machine to your desktop, do you get the same results? - If you ping for an extended period (ping -t), do you get more timeouts? - Are you directly connected to the

extreme network latency

Hi users! I've just changed hardware for my gateway. It's now built on the asus z170i pro gaming motherboard and runs df 4.6. Unfortunately it suffers extreme latency on my lan and I don't know how to troubleshoot this. Between other devices on the lan there's no problem. The gateway isn't loaded