Profiling bug in 6.10.4

[Simon Marlow]

On 01/04/2010 02:10, Gregory Wright wrote:
>
> On 3/31/10 11:44 AM, Ian Lynagh wrote:
>> On Mon, Mar 22, 2010 at 02:54:26PM -0400, Gregory Wright wrote:
>>> Now they seem to both be correct. The key value is at the bottom of
>>> column 8. This should be 2.386e-1
>>> (which means that 23.86 percent of the protons in the early universe end
>>> up as helium). So it
>>> seems that this is a problem either with 6.10.4, or with OS X.
>>>
>>> Quite strange. I will try to get 6.12 building on my machine to see if
>>> the problem persists.
>> It would also be worth trying without the -optc-O3 and -optc-ffast-math
>> flags, as the different code generated may confuse the mangler.
>>
>> If none of that helps, can you file a ticket please? If you can boil it
>> down to a small self-contained testcase (in particular, removing the
>> hmatrix dependency, if necessary by inlining code you need from it)
>> that would make it easier to investigate.
>>
>>
>> Thanks
>> Ian
>>
>>
> Removing -optc-O3 and -optc-ffast-math did not help. In fact, I took at
> all of the
> ghc options I was passing and the problem is still there. I will try to
> reduce the failure
> to a self contained testcase. I don't use much from hmatrix --- aside
> from the LU
> solution for a matrix system, just basic matrix addition, subtraction,
> scaling and the
> dot product.

There is already a ticket for this issue:
  http://hackage.haskell.org/trac/ghc/ticket/3942

Please update it if you have more information.

Cheers,
	Simon