GHC 6.4.3 is stalled

Joel Reymont joelr1 at
Fri Jul 28 05:48:30 EDT 2006

On Jul 28, 2006, at 8:58 AM, Simon Marlow wrote:

> Hi Greg,
> Gregory Wright wrote:
>> Some data and a few questions:
>> 1. The failure on FreeBSD is not the same as on OS X.  I built 6.4.2
>> from cvs on FreeBSD 6.1, and ran the ghc-regress tests. The tests
>> took a long time to run (about 14 hours on a dual Xeon 2.8 GHz
>> with 2 GB of memory). Towards the end of the tests, there were
>> about 30 "timeout" processes running, apparently doing nothing
>> but consuming cpu cycles.
> Ok, this is certainly a problem with forkOS in the threaded RTS in  
> 6.4.2 on FreeBSD.  I probably need to get access to a FreeBSD box  
> to fix this myself, the code is pretty delicate (and sadly it has  
> completely changed in 6.6, too).

The same problem exists on Mac Intel.


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