Re: VM in Xen 4.1; poor packet forwarding performance on xn0
Em 18/04/2014, às 11:57, seanr...@gmail.com seanr...@gmail.com escreveu: Hi there freebsd-xen, I tried first on freebsd-questions@ without success, so I thought to retry here. I run OpenVPN on a FreeBSD 10.0-Rp1 VM in Xen 4.1 (HVM). I am experiencing slow network performance on xn0 that seems to have developed after I upgraded to FreeBSD 10 (no other changes). I can only achieve about 0.5mbps through this interface when forwarding packets; packets in a single direction are fine (e.g; downloading to the VPS or pushing from the VPS) and clock in at many (10 usually) mbps. Interestingly, my identical VM (configuration managed centrally) running on Xen 3.4 (HVM) does *not* have this issue. I did a little debugging and here's what I've noticed: - Not related to OpenVPN, repro'd using ssh -d. - Slow VM has a very low rate of context switches (~250) while forwarding, fast VM has a lot more (~2000) sampled over 5 seconds using systat -v. - I can't repro a context switch limit (tried a limited fork() bomb). - Tried with *and* without LRO and TSO on xn0 (and all combinations of LRO and TSO on/off) I started digging into the Xen drivers but I realised I am not equipped to debug this. I'm looking for suggestions on what to check. My provider is offering to move me to an older Xen host but I'd like to see if I can help identify a bug either in my configuration or perhaps in FreeBSD's Xen code. Sean _ Do you use pf? ___ 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: Poor network performance
Em 04/04/2014, às 10:55, Mark Felder f...@freebsd.org escreveu: On Apr 3, 2014, at 4:26, Egoitz Aurrekoetxea ego...@sarenet.es wrote: Hi Jay, Tso is a nic's feature. Nothing to do with packet filtering. There is a known bug with TSO and pf on Xen. There is an open PR -- kern/ It 's a big mistery for me, yesterday i install one freebsd10 with pf in one dom0 xenserver, and the performance is ok, and i don't disable TSO. But one month ago, i install freebsd 10 in one dom0 debian 6.0 , and i have poor performance too, and disable or enable TSO do not make diference. Sorry for my poor english. ___ 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: FBSD 10.0-S (r261289M) under XenServer 6.2 - Stuck sshd in urdlck?
Em 18/03/2014, às 06:47, Karl Pielorz kpielorz_...@tdx.co.uk escreveu: --On 18 March 2014 09:44 +0100 Roger Pau Monné roger@citrix.com wrote: The output of vmstat -ai might also be helpful to assure that event timers are working correctly. Ok, that's at the bottom of this email. Also, does this VM have some PCI-passthrough? Did you migrate it? The xl configuration file used to create the domain would also be interesting. VM has no passthrough (this is a completely separate system to the one I was doing the passthrough work on), and was created 'from new' - from Xen Center I did VM, new VM I used the Other install media template with 2 vCPU's and 2048Mb of RAM - and fed it the FreeBSD 10.0-R amd64 install ISO. Single GPT partition, ufs - and a small (2Gb SWAP partition). Once the system was running I installed subversion then did a svn checkout of 'stable' source - rebuilt the world/kernel / installed the kernel/world - and did the usual mergemaster updates. Also, could you try the same workload with a pristine GENERIC kernel? Ok - I'll leave this VM 'as-is' If I get time I'll setup two new VM's - a stock 10.0-R with stock GENERIC, and another one using the r261289M source from this machine, but stock GENERIC kernel (the only mods I'd made were the 'NO_ADAPTIVE_' changes as recommended by the xen man page). It may be a while before I know if sshd is going to get 'stuck' again - but I'll keep an eye on them. -Karl This problem seems to not be in virtualization, the FUG-BR are discussing this issue in SSH FreeBSD10. ___ 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: Panic with FreeBSD 10 RC2 on Netbsd Xen dom0
Em 17/12/2013, à(s) 22:16, Markus Pfeiffer markus.pfeif...@morphism.de escreveu: Dear all, I tried installing FreeBSD10-RC2 under Netbsd XEN dom0 (xen 4.2.0). Unfortunately when I try connecting to the guest with ssh, the machine panics. I managed to take a screenshot of the output at the time of the panic: http://imgur.com/MH8Z3Xz If needed I can probably upload the crashdump. Cheers, I'm have same problem Dom0: NetBSD 6.0.1 - Xen 4.0.1 DomU: FreeBSD 10.0 RC2 - i386 Instalation of freebsd is from bootonly iso. Some tests: Domu console-ssh to localhost - Ok DomU console- svnlite co http://svn0.eu.freebsd.org/ports/head - NOK DomU console- ping www.google.com - OK any host- ping to DomU- OK DomU console- fetch ftp://ftp.freebsd.org/pub/FreeBSD/releases/i386/10.0-RC2/src.txz - OK DomU console- portsnap fetch - NOK -- www.bsdjf.com.br ___ 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: FreeBSD PVHVM call for testing
2013/5/16 Sergey Nasonov snaso...@bcc.ru Hello. I have get problem running XENHVM kernel. FreeBSD VM was created based on template Other install media Fetching from git and compilation was fine. Unfortunately I cant copy VM screen output from XenCenter console so write this by hand. run_interrupt_driven_hooks: still waiting after 60 seconds for xenbusb_nop_confighook_cb run_interrupt_driven_hooks: still waiting after 120 seconds for xenbusb_nop_confighook_cb run_interrupt_driven_hooks: still waiting after 180 seconds for xenbusb_nop_confighook_cb run_interrupt_driven_hooks: still waiting after 240 seconds for xenbusb_nop_confighook_cb run_interrupt_driven_hooks: still waiting after 300 seconds for xenbusb_nop_confighook_cb panic: run_interrupt_driven_config_hooks: waited too long cpuid = 0 KDB: enter: panic [ thread pid 0 tid 10 ] Stopped atkdb_enter+0x3e: movq $0,kdb_why You need remove CD/DVD from guest, i'm not remember the command and the link with this commando, search for remove cd/dvd from guest on xcp ou xenserver . -- http://w http://shastybsd.blogspot.comww.bsdjf.com.br ___ 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
