Date: Sat, 29 Mar 2014 14:30:29 +0100 From: Big Lebowski <spankthespam@gmail.com> To: Mark Felder <feld@freebsd.org> Cc: freebsd-xen@freebsd.org Subject: Re: Terrible performance of XenServer 6.2 and FreeBSD 10.0-RELEASE guest Message-ID: <CAHcXP%2Bdo3xx%2BRUjtgRnCooNXnzFm5xMcPDvuwrLawZ_Gk7fc6g@mail.gmail.com> In-Reply-To: <8FDB514D-1A94-48B2-AE19-62923F327938@FreeBSD.org> References: <CAHcXP%2BeLEKP%2BrZ5gXo_fg1Q_jQQ7-G-_E8Bn5co-FjvSV2G22Q@mail.gmail.com> <8FDB514D-1A94-48B2-AE19-62923F327938@FreeBSD.org>
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On Sat, Mar 29, 2014 at 2:07 PM, Mark Felder <feld@freebsd.org> wrote: > Is all this work being done over SSH? Yes, this is done over SSH. > Do you have a pf firewall? No, I dont. > Have you disabled TSO? > > ifconfig xn0 -tso > > or > > sysctl net.inet.tcp.tso=0 > This was enabled, but I've now disabled it. However, the network I/O seems to be ok, on par with what I can achieve on Linux boxes. Its disk I/O that makes the system unusable. > > > My suspicion is that the slowness of the shell over the network is making > the machine seem slower than it should be. There are terrible network > issues with pf and tso on a XenServer environment. I'm not otherwise aware > of severe I/O issues on XenServer. I have a fairly large cluster running > almost all FreeBSD guests without any sort of issues related to I/O. > Thanks for the TSO tip!
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