On Mon, 2013-02-25 at 10:39 +0000, Svein Ove Aas wrote:
> In this day and age, it seems odd that we have to explicitly specify the
> number of cores. Detecting it would be pretty simple, on all systems I know
> of.
With some executable compiled using GHC 7.6.1 & threaded RTS, from +RTS
--help:
-N[<n>] Use <n> processors (default: 1, -N alone determines
the number of processors to use automatically)
Nicolas
>
> Before I go ahead and write a patch, I'd there some technical or political
> reason we're boy doing that?
> On 25 Feb 2013 00:58, "Kazu Yamamoto" <[email protected]> wrote:
>
> > > We should really publish a blog post about this.
> >
> > - If we will take benchmark, "+RTS -Nx -qa -Aym" should be specified
> > to a server. "y" should be changed according to "x", the number of
> > core. I'm using "+RTS -N10 -qa -A32m" on a 12 core machine. "-qa"
> > improves performance on Linux but not FreeBSD even if a "-qa" bug of
> > GHC on FreeBSD is fixed.
> >
> > http://hackage.haskell.org/trac/ghc/ticket/7708
> >
> > - "ab" sucks. We should use "weighttp" instead. I use as
> > weighttp -n 1000000 -c 1000 -k -t 10 "http://X.Y.Z.W:8000/";
> > which creates 10 native threads.
> >
> > For more information, please refer to:
> > http://gwan.com/en_apachebench_httperf.html
> >
> > http://www.iij.ad.jp/company/development/tech/activities/weighttp/index.html
> > (in Japanese, sorry)
> >
> > --Kazu
> >
> > _______________________________________________
> > ghc-devs mailing list
> > [email protected]
> > http://www.haskell.org/mailman/listinfo/ghc-devs
> >
>
> In this day and age, it seems odd that we have to explicitly specify
> the number of cores. Detecting it would be pretty simple, on all
> systems I know of.
>
> Before I go ahead and write a patch, I'd there some technical or
> political reason we're boy doing that?
>
> On 25 Feb 2013 00:58, "Kazu Yamamoto" <[email protected]> wrote:
> > We should really publish a blog post about this.
>
> - If we will take benchmark, "+RTS -Nx -qa -Aym" should be
> specified
> to a server. "y" should be changed according to "x", the
> number of
> core. I'm using "+RTS -N10 -qa -A32m" on a 12 core machine.
> "-qa"
> improves performance on Linux but not FreeBSD even if a
> "-qa" bug of
> GHC on FreeBSD is fixed.
>
> http://hackage.haskell.org/trac/ghc/ticket/7708
>
> - "ab" sucks. We should use "weighttp" instead. I use as
> weighttp -n 1000000 -c 1000 -k -t 10
> "http://X.Y.Z.W:8000/";
> which creates 10 native threads.
>
> For more information, please refer to:
> http://gwan.com/en_apachebench_httperf.html
>
>
> http://www.iij.ad.jp/company/development/tech/activities/weighttp/index.html
> (in Japanese, sorry)
>
> --Kazu
>
> _______________________________________________
> ghc-devs mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/ghc-devs
> _______________________________________________
> ghc-devs mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/ghc-devs
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