Out of interest, have you tried using parListChunk to break the work
into larger pieces? It seems rather unlikely to help with this case as
the parts are already pretty large, but perhaps it's worth a shot.
___
Haskell-Cafe mailing list
Haskell-Cafe@haske
On Fri, Apr 11, 2008 at 10:43 AM, Don Stewart <[EMAIL PROTECTED]> wrote:
> sebastian.sylvan:
> >On Wed, Apr 9, 2008 at 10:58 PM, Justin Bailey <[EMAIL PROTECTED]
> >
> >wrote:
> >
> > On Wed, Apr 9, 2008 at 2:25 PM, Sebastian Sylvan
> > <[EMAIL PROTECTED]> wrote:
> > > Nope!
sebastian.sylvan:
>On Wed, Apr 9, 2008 at 10:58 PM, Justin Bailey <[EMAIL PROTECTED]>
>wrote:
>
> On Wed, Apr 9, 2008 at 2:25 PM, Sebastian Sylvan
> <[EMAIL PROTECTED]> wrote:
> > Nope!
> >
> > This is GHC 6.8.2 btw, downloaded the binary from the web site, so
>
On Wed, Apr 9, 2008 at 11:10 PM, Justin Bailey <[EMAIL PROTECTED]> wrote:
> On Wed, Apr 9, 2008 at 3:03 PM, Sebastian Sylvan
> <[EMAIL PROTECTED]> wrote:
> > Hmm, that's curious. I compile with "ghc --make -threaded partest.hs -o
> > par.exe", and then run it with "par.exe +RTS -N2 -RTS". Am I mak
On Wed, Apr 9, 2008 at 3:03 PM, Sebastian Sylvan
<[EMAIL PROTECTED]> wrote:
> Hmm, that's curious. I compile with "ghc --make -threaded partest.hs -o
> par.exe", and then run it with "par.exe +RTS -N2 -RTS". Am I making some
> silly configuration error?
> Are you running this on windows?
Yep, tha
On Wed, Apr 9, 2008 at 10:58 PM, Justin Bailey <[EMAIL PROTECTED]> wrote:
> On Wed, Apr 9, 2008 at 2:25 PM, Sebastian Sylvan
> <[EMAIL PROTECTED]> wrote:
> > Nope!
> >
> > This is GHC 6.8.2 btw, downloaded the binary from the web site, so it's
> > nothing strange.
>
> On my hyper-threaded CPU, you
On Wed, Apr 9, 2008 at 2:25 PM, Sebastian Sylvan
<[EMAIL PROTECTED]> wrote:
> Nope!
>
> This is GHC 6.8.2 btw, downloaded the binary from the web site, so it's
> nothing strange.
On my hyper-threaded CPU, your original code works fine. With -N2, I
see 100% CPU. With N1, only 50%. I am also using G
On Wed, Apr 9, 2008 at 10:22 PM, Justin Bailey <[EMAIL PROTECTED]> wrote:
> 2008/4/9 Sebastian Sylvan <[EMAIL PROTECTED]>:
> > main = print $ parMap rnf fib $ take 80 $ randomRs (30,35) (mkStdGen
> 123)
>
> Does the strategy "rwhnf" do it for you?
>
> Justin
>
Nope!
This is GHC 6.8.2 btw, downl
2008/4/9 Sebastian Sylvan <[EMAIL PROTECTED]>:
> main = print $ parMap rnf fib $ take 80 $ randomRs (30,35) (mkStdGen 123)
Does the strategy "rwhnf" do it for you?
Justin
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mail
Hi,
I was toying with the Control.Parallel.Strategies library, but can't seem to
get it to actually do anything in parallel!
Here's the code:
import System.Random
import Control.Parallel.Strategies
fib :: Int -> Int
fib 0 = 1
fib 1 = 1
fib n = fib (n-1) + fib (n-2)
main = print $ parMap rnf fib
10 matches
Mail list logo
