Skip site navigation (1)Skip section navigation (2)
Date:      Thu, 26 Feb 2009 13:33:18 +0000 (GMT)
From:      Robert Watson <rwatson@FreeBSD.org>
To:        Alexander Leidinger <Alexander@Leidinger.net>
Cc:        svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org
Subject:   Re: svn commit: r189063 - head/sys/kern
Message-ID:  <alpine.BSF.2.00.0902261331250.41191@fledge.watson.org>
In-Reply-To: <20090226134937.13523qtfgxc9ik7k@webmail.leidinger.net>
References:  <200902261056.n1QAuDTL025375@svn.freebsd.org> <alpine.BSF.2.00.0902261056280.16988@fledge.watson.org> <20090226134937.13523qtfgxc9ik7k@webmail.leidinger.net>

next in thread | previous in thread | raw e-mail | index | archive | help

On Thu, 26 Feb 2009, Alexander Leidinger wrote:

>> A typical tracing command might be:
>>
>>  dtrace -n 'priv:::priv_ok { trace(execname); trace(arg0);}'
>> 
>> arg0 requires manual interpretation using /usr/include/sys/priv.h.
>
> Theoretically it is possible to write a little script which takes priv.h and 
> generates a little bit of dtrace stuff which allows to print out strings 
> instead of numbers. But I think this is a matter of motivation...
>
> I would also use printf("program: %s, priv: $d\n", execname, arg0) or 
> something similar with printf, but this is cosmetics.
>
> Should we create a repository of dtrace scripts in /usr/share or wherever? 
> For the linuxulator I have several scripts in my linuxulator-dtrace branch 
> (some more, some less useful for non-developers).

I have a couple up on the wiki on the DTrace/Examples page from some 
callout-related profiling I was doing, but some sort of more formal library 
would be good.  I guess the question is "how productionable do we want them to 
be" -- if they're just fragments then a wiki or the tools tree might be good; 
if it's really going to be a formal set of analysis tools with consistent 
interface, style, and maintained over time then usr/share would be better, but 
I think having consistency in approach and content would be something very 
much to encourage.

Robert N M Watson
Computer Laboratory
University of Cambridge
_______________________________________________
svn-src-all@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscribe@freebsd.org"



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?alpine.BSF.2.00.0902261331250.41191>