Re: Confidence: Chopping between 5.2 and 6.0.1

[David Brownlee <abs%netbsd.org@localhost>]

Looks like you're getting close to identifying the offending commit :)

I wonder if it could be something in the pcu changes (
http://mail-index.netbsd.org/source-changes/2011/05/02/msg021630.html
)

On 23 March 2013 22:28, Donald Lee <MacPPC2%c.icompute.com@localhost> wrote:
> At 2:12 PM -0400 3/23/13, Michael wrote:
>>Hello,
>>
>>On Fri, 22 Mar 2013 23:38:17 -0500
>>Donald Lee <MacPPC2%c.icompute.com@localhost> wrote:
>>
>>> I have converged on a 99% solution for my "chop".  Here is my
>>> data:
>>>
>>> 2011-04-15 - usr9 - netbsd 5.99.49 - clean - clean2 - c3 c4 c5
>>> 2011-04-25 - usrd - (buildfail)      netbsd 5.99.50
>>> 2011-05-05 - usra - netbsd 5.99.51 - clean - bad2 - bad3
>>> 2011-05-11 - usrc - netbsd 5.99.51b - clean - clean bad1 bad2 bad3
>>> 2011-05-17 - usrb - netbsd 5.99.51a - bad - bad - bad - bad
>>>
>>> These are the checkout dates I tried, and the test results.
>>>
>>> The 2011-04-15 version was the latest one where I saw no errors, even though
>>> I ran the test case (at least) 5 times.  No errors on versions prior to that
>>> date.
>>>
>>> The 2011-04-25 checkout did not build, unfortunately.
>>>
>>> The 2011-05-05 and 2011-05-11 builds looked OK, but when I re-ran the
>>> tests, I did see failures.  For the 2011-05-11 version especially, it
>>> was hard to get an error, but I did get them.  2011-05-17 (and later)
>>> seems to fail freely
>>>
>>>
>>> This puts the timeframe about 3 weeks - somewhere between 2011-04-15
>>> and 2011-05-05, code went in to cause our badness.
>>
>>There was a bunch of altivec and fpu handling related commits on May 2nd:
>>http://mail-index.netbsd.org/source-changes/2011/05/date1.html
>>Might be worth to check right before / after that.
>>
>>have fun
>>Michael
>
> I'll see if May 1 builds.
>
> -dgl-