One-shot semantics in GHC event manager

[Ben Gamari]

Kazu Yamamoto <kazu at iij.ad.jp> writes:

> Hi,
>
Hi Kazu,

>>> Andreas - want me to go ahead and get you some hardware to test Ben's
>>> patch in the mean time? This way we'll at least not leave it hanging
>>> until the last moment...
>> 
>> I will also try this with two 20-core machines connected 10G on
>> Monday.
>
> I measured the performace of GHC head, 7.8.3 and 7.8.3 + Ben's patch
> set.
>
> Server: witty 8080 -r -a -s +RTS -N<n> *1
> 
Have you noticed that witty will sometimes terminate (with exit code 0)
spontaneously during a run? This seems to happen more often with higher
core counts. I've seen this both with and without my patch (based on
master as of earlier today).

Cheers,

- Ben

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