Re: compiled printf support increases C source and ko module sizes a bit

[Mark Wielaard <mjw at redhat dot com>]

On Fri, Nov 25, 2011 at 02:57:28PM +0100, Mark Wielaard wrote:
> I noticed the compiled printf support does bloat the generated src.c
> file a bit for things like:
> stap -e 'probe process("/bin/ls").function("*")
>         { printf("%s(%s)\n", probefunc(), $$parms) }'
> 
> It produces with stap 1.6 a 781K .c source file and a 1.2M .ko file.
>   and with stap git trunk a 1.1M .c source file and a 1.5M .ko file.

On irc Frank asked for a -t comparison. See attached.

It looks like the probe overhead is often hundreds of cycles lower.
But Pass 4 get more than a second slower.

Cheers,

Mark

Attachment: stap-1.6.out
Description: Text document

Attachment: stap-git.out
Description: Text document