[Qemu-devel] Re: Performance Monitoring

[Charles Duffy]

Cheif Jones wrote:
> I'm doing a research project in which i want to run an OS under an 
> emulator for a period of time and get full CPU opcode statistics (how 
> many times every opcode was executed). As far as i understand the Qemu 
> design, it is doing "JIT" translation of terget opcode to host opcodes 
> to improve performance, and so there is no easy way to count target 
> opcodes (e.g a loop is compiled JIT and runs natively).

Is an actual emulator necessary, or could you use something like an 
instrumented UML kernel? I'd think that would be a much simpler approach.