[Haskell-cafe] getNumCapabilities always returns 1 with GHC 7.10.2 on OS X

[Geraldus]

Great, thanks Michael.  That was false alarm, please excuse me.

пн, 24 авг. 2015 г. в 15:19, Michael Snoyman <michael at snoyman.com>:

> How about --ghc-options:
>
>     stack ghci --ghc-options "+RTS -N8 -RTS"
>
> On Mon, Aug 24, 2015 at 1:14 PM, Geraldus <heraldhoi at gmail.com> wrote:
>
>> Ok, now it shows me eight cores.  So, I've passed arguments incorrectly,
>> what is the correct way to do this?
>>
>> *(Also, `$(stack exec which ghci) +RTS -N8` does not work with fish shell
>> which I'm using by default, but I tested your suggestion in bash)*
>>
>> пн, 24 авг. 2015 г. в 14:37, Michael Snoyman <michael at snoyman.com>:
>>
>>> It looks like you're sending the RTS options to `stack` in the first
>>> one, not to ghci itself. What's the result with `$(stack exec which ghci)
>>> +RTS -N8`?
>>>
>>> On Mon, Aug 24, 2015 at 12:32 PM, Geraldus <heraldhoi at gmail.com> wrote:
>>>
>>>> I have OS X Yosemite 10.10.4.  There are two bundles of GHC (from
>>>> ghcformacosx.github.io): 7.10.1 and 7.10.2.  The latter always shows
>>>> me one core when running `getNumCapabilities` action:
>>>>
>>>> *GHC 7.10.2*
>>>> > stack ghci +RTS -N8
>>>> Using resolver: lts-3.0 from global config file:
>>>> /Users/arthurfayzrakhmanov/.stack/global/stack.yaml
>>>> Configuring GHCi with the following packages:
>>>> GHCi, version 7.10.2: http://www.haskell.org/ghc/  :? for help
>>>> Prelude> :m +Control.Concurrent
>>>> Prelude Control.Concurrent> getNumCapabilities
>>>> 1
>>>>
>>>>
>>>> *GHC 7.10.1*
>>>> > /Applications/ghc-7.10.1.app/Contents/bin/ghci +RTS -N8
>>>> GHCi, version 7.10.1: http://www.haskell.org/ghc/  :? for help
>>>> Prelude> :m +Control.Concurrent
>>>> Prelude Control.Concurrent> getNumCapabilities
>>>> 8
>>>>
>>>> It looks like a 7.10.2 bug, can some one confirm that?
>>>>
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>>>>
>>>>
>>>
>
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