DTrace on Xen?

[Thor Lancelot Simon <tls%panix.com@localhost>]

Next try: is DTrace (particularly FBT) expected to work on NetBSD/xen?

I'm struggling to get some grasp on why I/O to SCSI disks uses *25X* more
CPU in "interrupt" time on the same system under NetBSD/xen than under
NetBSD/amd64.  Kernel profiling clearly does not work, so I'm hoping to
get somewhere with DTrace even if I have to do much of what gprof would
do for me by hand.

This is -- among other things -- crippling the Foundation's pkgsrc build
server.  So I could use some help, if anyone's got it to give.

Thor