[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xen-access performance from DomU
By the way, this is with Xen-4.4 (although I had the same issue on 4.3), running Ubuntu 13.10 Saucy with kernel 3.11.0-19-generic. On Thu, Apr 10, 2014 at 6:42 PM, Bread Cutter <cutter409@xxxxxxxxx> wrote: > Hello all, > > I'm having a performance issue with the xen-access API from DomU. > > First of all, I've changed xen/include/xsm/dummy.h so that all > permissions are allowed. This is temporary and for testing, simply so > that I could run xen-access from DomU. I've also changed > tools/tests/xen-access/xen-access.c (patch attached) so that I monitor > cr3 writes. This was just something that happens consistently enough > for comparing performance. The actual value of cr3 isn't important for > my testing. > > When I run xenaccess in Dom0, the target HVM domain runs pretty > smoothly. I can launch programs and Windows feels pretty responsive. > > However, when I run the same tool from a PV-DomU, the target domain > becomes extremely sluggish. Launching a web browser takes a long time, > for example, and it's essentially unusable. > > Can anyone offer any insight, and/or a remedy? > > Thank you! _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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