Bjoern A. Zeeb <bzeeb-li...@lists.zabbadoz.net> wrote: > > On 22 Dec 2017, at 20:30, Michael Grimm wrote:
>> Hi — >> >> [ I am including freebsd...@freebsd.org now and removing >> freebsd-j...@freebsd.org ] >> [ Thread starts at >> https://lists.freebsd.org/pipermail/freebsd-net/2017-December/049470.html ] >>>> >>>> (#) there is a *dramatic* performance loss (TCP) when: >>>> >>>> (-) fetching files from outside through PF/extIF via bridge to jail > … >>>> >>>> Thanks for your suggestions so far, but I am lost here. Any ideas? >>> >>> It seems to me some kind of bug in the PF. >>> I personally never tried it, I use ipfw and it works just fine. >> >> Before testing IPFW (which I have never used before) I'd like to ask the >> experts in freebsd...@freebsd.org about possible tests/tweaks regarding PF. > > OK, too complicated setups; I am not getting it fully. ;-) > Can you please just describe the one case that doesn’t work well in all > detail and ignore all the others for a moment? > > (a) what’s the external host interface? vtnet > (b) pf runs on the base system? yes > (c) you are bridging into a VNET-jail? How exactly? Are you bridging to > epairs? yes, I am bridging epairs > (d) where exactly are you NATing? I am NATing IPv4 and IPv6 at the host' PF ffirewall > (e) why are you bridging and NATing? That makes little sense to me. > Couldn’t you NAT and forward or just bridge? hmm, that has been developed by myself over the years. I do "consider" my jails as jails with their own network stack, like isolated "VM". > (f) what’s inside the VNET jail? Another pf or anything? no more firewall, my jails are merely service jails (dns, mail, web, …) > (g) out of curiosity, does dmesg on the base system indicate anything? No. > To understand your performance problem better: > > (1) you are doing a fetch of a rather large file to test from within the VNET > jail? Or what are you fetching? Are you using fetch? yes, I do something like the following with the jail: wget https://download.freebsd.org/ftp/releases/ISO-IMAGES/11.1/FreeBSD-11.1-RELEASE-amd64-bootonly.iso -O /dev/null > (2) if you fetch from within the same VNET jail does that perform? > (3) if you fetch something to the VNET jail from the base system just going > through your internal setup but not leaving the machine, does that still > perform? > (4) if you fetch something to the VNET jail from the same LAN (if possible to > test) does that perform? > (5) if you fetch something to the VNET jail from a close by location does > that make a difference to something on the other side of the planet? I will skip these questions for the time being, because I did solve my issue 15 minutes before your mail ;-) And I feel sorry for all your now "wasted" efforts in trying to help me. As I am using vtnet interface in a cloud environment (Public Cloud by OVH) I did read the vtnet(4) man pages and stumbled about "LOADER TUNABLES" like: hw.vtnet.lro_disable hw.vtnet.X.lro_disable This tunable disables LRO. The default value is 0. Well, without knowing and understanding the implications of those loader tunables I did disabled them step by step, and bingo, setting … hw.vtnet.lro_disable="1" … in /boot/loader.conf" and performance is back from KB/s to MB/s. I really do not understand what I have done and why it is working and whether that will have negative implications for my servers. Perhaps someone of you experts could help me understand it. Because I am leaving in some hours for Xmas vacations, I won't be able to come back to this issue for some days now. I'd like to thank all of you for your patience and help, and: Merry Christmas and with kind regards, Michael _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
