On Fri, Jul 23, 2010 at 2:15 PM, Stefan Hajnoczi <stefa...@gmail.com> wrote: > On Fri, Jul 23, 2010 at 4:12 AM, Mulyadi Santosa > <mulyadi.sant...@gmail.com> wrote: >> Hi... >> >> On Fri, Jul 23, 2010 at 05:30, Eduardo Cruz <eduardohmdac...@gmail.com> >> wrote: >>> Hello, I need qemu to keep track of all the memory access made by the guest, >>> including read, write and the instruction fetches.
I don't think Qemu can provide cycle number information. But other information are all available. >> >> AFAIK there are lots of experiments on this and has produces working >> patches...at least from the posting of the creator. There is even a >> patch floating to start creating trace framework a while ago. > > Thanks Mulyadi, I think you are referring to the tracing work that > Prerna Saxena and I are doing. Here is the documentation: > > http://repo.or.cz/w/qemu/stefanha.git/blob/tracing:/docs/tracing.txt > > The patches apply to qemu.git. You can define trace events in the > trace-events file and then call them from places in the code. There > is a script to pretty-print the binary trace file that QEMU produces. > > Eduardo, if you think this might be what you're looking for, please > give it a try. I am on #qemu and #kvm IRC if you need any help. Any > feedback will be valuable to us as we prepare these patches for > submission to qemu.git. > > I believe the tracing framework answers the "Any ideas of how I can > record these information with qemu?" part of your question :). I > don't have experience in the TCG, so I can't give advice on how to > best get at the memory accesses, but I hope this helps you one step > further. > Can this framework trace memory access event? I guess this would be more difficult to do in KVM than in TCG. > Stefan > >> perhaps you could dig a little deeper in qemu archieve....? >> >> -- >> regards, >> >> Mulyadi Santosa >> Freelance Linux trainer and consultant >> >> blog: the-hydra.blogspot.com >> training: mulyaditraining.blogspot.com >> >> > > -- Best regards, Chen Yufei
