[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] xen-access performance from DomU
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! Attachment:
xen-access_cr3.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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