Re: [Qemu-devel] Re: [PATCH] flush TB on singlestep command

[Stefan Weil <weil@mail.berlios.de>]

Am 28.04.2010 01:50, schrieb Jun Koi:
> On Wed, Apr 28, 2010 at 4:55 AM, Stefan Weil <weil@mail.berlios.de> wrote:
>> Typical use case: execution trace of some code which is
>> run after OS boot with an explicit trigger.
>>
>> This can be loading of a linux kernel module, a user space
>> application or kernel code which handles a rare event.
>>
>> I can enable logging and single stepping before that code
>> starts. There is no need to re-translate existing TBs:
>> they are faster than TBs with only single steps, so only
>> the execution of the new code is slow, and only new TBs
>> will appear in qemu.log which is exactly what I want.
>>
>> Typically, I use single stepping like this to examine a
>> problem with QEMU's emulation or code generation. Two examples:
>> some years ago aptitude crashed in mips emulation (fpu emulation
>> problem), and now I use it to examine differences between
>> native TCG and TCI (tiny code interpreter).
>
> What is that TCI???
>
> Thanks,
> J


TCI stands for Tiny Code Interpreter and is a new way
to run QEMU's Tiny Code. Links with more information:

http://lists.gnu.org/archive/html/qemu-devel/2009-09/msg01710.html
http://repo.or.cz/w/qemu/ar7.git/blob_plain/master:/tcg/bytecode/README

Regards,
Stefan