Hi all, I am a developer of Systemtap. I am looking into tracing KVM (the kernel part and QEMU) and also the KVM guests with Systemtap. I googled and found references to Xenprobes and xdt+dtrace, and I was wondering if someone is working on the dynamic tracing interface for KVM? I've read the KVM kernel code and I think some expensive operations (things that need to be trapped back to the host kernel - eg. loading of control registers on x86/x64) can be interesting spots for adding an SDT (static marker), and I/O operations performed for the guests can be useful information to collect. I know that KVM guests run like a userspace process and thus techniques for tracing Xen might be overkilled, and also gdb can be used to trace KVM guests. However, are that anything special I need to be aware of before I go further into the development of the Systemtap KVM probes? (Opinions / Suggestions / Criticisms welcome!) Thanks, Rayson -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
