stptracer-20060828 has released.

[Masami Hiramatsu]

Hi,

Li Guanglei wrote:
>  Both Power5(ppc64) and my thinkpad show that gBTI is almost twice as
> fast as _stp_printf(%8b) and although in P-M CPU is not so obvious as
> Power5.

That's why I can't dispose of gBTI yet. I think most overhead comes from
parsing the format string.

>  Another interesting thing is that the Power5 will take ~983ns to
> execute an empty kprobe handler(1372-391) while the thinkpad only takes
> ~233ns, almost *FOUR* times as fast as Power5. I guess it's because of
> the kprobe-booster patch and it hasn't gone into ppc64 yet, Right?

Right. Now we're porting kprobe-booster to IA64 and x86-64 architectures.
Currently, I don't have any plans to port it to ppc64 by myself, because
I don't have ppc64 machines and any knowledge about ppc64.

Thanks,
-- 
Masami HIRAMATSU
2nd Research Dept.
Hitachi, Ltd., Systems Development Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com