Re: Help! Network issue with freebsd + Xen
Hi Janne, I don't know whether this is an issue with the re driver or something else that's affecting the re driver (the way Xen handles network traffic). Though as far as I know, when a collision is detected, the behavior is for the sender to invoke it's backoff algorithm and to wait a set amount of time before transmitting again. if this is actually occurring then there would be performance degradation. Would you mind adding your feedback on my PR up at freebsd.org just to let the re maintainer know it's not just me? The PR is 154236. Would Greatly appreciate it. Thanks in advance. On 26/01/11 17:59, Janne Snabb wrote: On Wed, 26 Jan 2011, Alex wrote: I am having an issue with high network interface collisions when running freebsd under XEN (I am using freebsd as my OS for a VPS). [..] whether they have seen the same issue or know what may be causing it. I can confirm seeing it here also, you are not alone: $ netstat -i NameMtu Network Address Ipkts Ierrs IdropOpkts Oerrs Coll re01500Link#1 00:16:3e:08:b4:c7 21150230 0 0 4101045 0 4019323 [..] I had not noticed it before. I am not encountering any packet loss or other networking problems. No idea about the reason. This is on FreeBSD 8.1-RELEASE-p2 amd64 with GENERIC kernel. -- Janne Snabb / EPIPE Communications sn...@epipe.com - http://epipe.com/ ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to freebsd-xen-unsubscr...@freebsd.org
Re: Help! Network issue with freebsd + Xen
I saw this same high collision count before I converted my RootBSD domU from GENERIC to XENHVM. I do not see any collisions show up in netstat -i with xn0/xn1 instead of re0/re1. Of course, I needed kern/154302's patch to make the XENHVM kernel work. I hope that gets committed and merged back in time for 8.2-RELEASE. ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to freebsd-xen-unsubscr...@freebsd.org
Re: Help! Network issue with freebsd + Xen
It's would be a logical conclusion that it's an issue with the re driver then. I cant get my 8.2-RC1 XENHVM kernel to boot so had to resort to GENERIC, the HVM kernel just panics and I remember seeing something along the lines of do something smart? does this patch you mention fix that? On 27/01/11 02:48, Nick Sayer wrote: I saw this same high collision count before I converted my RootBSD domU from GENERIC to XENHVM. I do not see any collisions show up in netstat -i with xn0/xn1 instead of re0/re1. Of course, I needed kern/154302's patch to make the XENHVM kernel work. I hope that gets committed and merged back in time for 8.2-RELEASE. ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to freebsd-xen-unsubscr...@freebsd.org ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to freebsd-xen-unsubscr...@freebsd.org
Help! Network issue with freebsd + Xen
Hi guys, I am having an issue with high network interface collisions when running freebsd under XEN (I am using freebsd as my OS for a VPS). I have filed a PR at http://www.freebsd.org/cgi/query-pr.cgi?pr=154236 and have had some discussion with the driver maintainer, we're both at a loss as to what the issue is, perhaps someone here could take a look at it and see whether they have seen the same issue or know what may be causing it. ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to freebsd-xen-unsubscr...@freebsd.org
