Re: [Qemu-discuss] instruction tracing based on qemu

[李阳]

Thanks. In fact, I don't need QEMU to have realized this kind of trace
about instructions and therefore this is my ToDoList on QEMU.

Now I have made some progress and still have some problems.

So far, I have found that in the source code of
QEMU(qemu-2.7.0-rc5-5/tcg/tcg-opc.h) there are a lot of instructions type,
such as load/store, arith, shift/rotetes and so on.

All I am confused about is where to identify the type of instruction, such
as Load/Store/Move instructions and count them for a specified benchmark.

Best


2017-11-01 19:40 GMT+08:00 Peter Maydell <address@hidden>:

> On 1 November 2017 at 02:35, 李阳 <address@hidden> wrote:
> > Recently, I want to use QEMU to trace the instruction features of the
> > specified binary.
> >
> > My host: X86
> > Guest: ARMv8,
> >
> > I run the benchmark on the AArch64 Operating System in QEMU and I want to
> > collect the instruction data of the binary.
> > The instruction features include: # of INT ALU, #of INT MUL, # of INT
> DIV,
> > # of FP ADD, # of FP MUL, # of FP DIV, # of LOAD, # of STORE.
> >
> > I have no idea about where and how to identify the type of instruction.
>
> QEMU does not currently provide any mechanism for doing this
> kind of tracing, I'm afraid. (There's some experimental
> stuff floating around but using it requires some familiarity
> with QEMU internals.) You may be able to get what you want
> by taking debug traces with -d options and post-processing
> them, but that's not trivial and you need to know what the
> debug logs are telling you to interpret them correctly.
>
> We're looking at adding a proper tracing/instrumentation
> feature, but that's still in the design proposals stage.
>
> thanks
> -- PMM
>