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Re: binary tracing
- From: Masami Hiramatsu <hiramatu at sdl dot hitachi dot co dot jp>
- To: Martin Hunt <hunt at redhat dot com>
- Cc: systemtap at sources dot redhat dot com, Yumiko Sugita <sugita at sdl dot hitachi dot co dot jp>, Satoshi Oshima <soshima at redhat dot com>, Hideo Aoki <haoki at redhat dot com>
- Date: Tue, 04 Apr 2006 22:31:02 +0900
- Subject: Re: binary tracing
- References: <1143829428.2617.15.camel@dragon>
Hi, Martin
I'd like to test that. Could you post the implementing patch of
the binary tracing?
Martin Hunt wrote:
> I am implementing step 1, just replacing the _stp_printf with one that
> can write binary suing "%b". Numbers look good so far.
>
> S : printf 5 integers 3926 2134 1633
> S : printf 10 integers 5667 3054 2325
> S : binary printf 5 integers 1937 1170 880
> S : binary printf 10 integers 2031 1203 925
>
> I hacked up another test which says using the translator optimization
> Tom proposed could cut up to 150ns off the 5 integer results. Transport
> optimizations should cut those a bit further. Keep in mind, these
> include kprobe overhead which is
>
> S : empty probe 1575 789 589
>
> Martin
>
>
>
>
--
Masami HIRAMATSU
2nd Research Dept.
Hitachi, Ltd., Systems Development Laboratory
E-mail: hiramatu@sdl.hitachi.co.jp