Ok. so I will then shift to using system tap, Are the timestamps generated for events compatible with the ftrace timestamps? so that I can still merge the traces using TSC_OFFSET.
Thanks, On Tue, Aug 16, 2016 at 8:05 PM, Daniel P. Berrange <berra...@redhat.com> wrote: > On Tue, Aug 16, 2016 at 07:54:50PM +0530, Gadre Nayan wrote: >> Hi, >> >> I have setup the merging of traces from Guest QEMU and Host using the >> TSC_OFFSET. So I would like to work with ftrace backend of QEMU. So >> how can I add this option in libvirt tools to enable ftrace backends >> with my custom qemu source built using --enable-trace-backends=ftrace. >> >> I would have to make changes to virt-install python script in the >> virt-manager tools for starters ( to parse the trace options :). Where >> else ? > > The need to modify the downstream tools to statically configure > tracing parameters for VMs is exactly why we don't want to support > things like ftrace in libvirt and recommend use of fully dymamic > tracing like dtrace/systemd/ltt-ust. > > Regards, > Daniel > -- > |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| > |: http://libvirt.org -o- http://virt-manager.org :| > |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| > |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|