Re: [avr-gcc-list] More results from the testsuite with avrtest

[Paulo Marques]

Weddington, Eric wrote:
> > -----Original Message-----
> > From: Paulo Marques
> > [...]
> > This gives us 13781 revisions to test. By bisecting, we should be able 
> > to lock in on the offending patch in less than 14 attempts. A script 
> > that automated this bisection process (checkout middle revision, test 
> > it, mark good/bad) would be great to find what exectly caused specific 
> > regressions.
> >
> > I may give it a try tomorrow,
>
> Please see the GCC project about this. IIRC, they already have a script
> that does a binary search on failing test cases. IIRC, it is in the
> contrib subdirectory.

If I had a nickel for every time I come up with a nice original idea 
that someone has already thought of before ;)

I looked into what is already done to help binary searches like I wanted 
to do, and there is a nice mechanism in place to solve one of the 
problems I was having: checking out tens or hundreds of different gcc 
revisions from the gcc repository over the internet :P

The existing solution consists of rsync'ing the gcc repository into a 
local repository, so that you can checkout any revision locally. You pay 
an initial setup cost, but then you can checkout any revision "for free" :)

The initial setup cost is 13Gb. Even if I'm lucky enough to get my 
internet connection to go at full speed, that's still at least 9 hours 
of download, so I guess I won't have any results tonight.

I can't wait to get a bisecting environment ready ;)

--
Paulo Marques
Software Development Department - Grupo PIE, S.A.
Phone: +351 252 290600, Fax: +351 252 290601
Web: www.grupopie.com

"For every problem there is one solution which is simple, neat, and wrong."
H. L. Mencken