Markus Barenhoff wrote:
I've updated my source tree today.
But now I've problem while compiling the ghc
Here is the the build output:
[...]
/usr/home/alios/src/haskell/ghc/ghc/ghc/stage1-inplace/ghc
-DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=2 -package-name ghc-6.11.20081211
-hide-all-packages
It seems that the problem you have is that moving to the multithreaded
runtime imposes an overhead on the communication between your two
threads, when run on a *single CPU*. But performance on a single CPU
is not what you're interested in - you said you wanted parallelism,
and for that you
Malcolm Wallace wrote:
It seems that the problem you have is that moving to the multithreaded
runtime imposes an overhead on the communication between your two
threads, when run on a *single CPU*. But performance on a single CPU
is not what you're interested in - you said you wanted
Malcolm Wallace wrote:
Simon Marlow marlo...@gmail.com wrote:
Malcolm Wallace wrote:
For the only application I tried, using the threaded RTS imposes a
100% performance penalty - i.e. computation time doubles, compared
to the non-threaded RTS. This was with ghc-6.8.2, and maybe the
overhead
Hi
While trying to see if I could make some code run faster I stumbled
upon something that looks weird to me: 2x-3x performance loss when a
module is renamed to a longer name!
Here's what I see with the attached examples:
#diff long-modname-ver.hs short-modname-ver.hs
2c2
import
Hi
I'm using GHC 6.10.1 on OS X. Any ideas on what may be going on?
Wow. Awesome bug! Got lots of discussion at Galois :)
I can confirm a difference in running time, we also tested with 6.8.x and
6.10,
with similar results.
Is -O2 implying -fvia-C? If so, could it be the evil mangler? Is
Running time as a function of module name length,
http://galois.com/~dons/images/results.png
10 is the magic threshold, where indirections start creeping in.
Codegen cost heuristic fail?
-- Don
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dons:
Running time as a function of module name length,
http://galois.com/~dons/images/results.png
10 is the magic threshold, where indirections start creeping in.
Codegen cost heuristic fail?
Given this, could you open a bug ticket for it, with all the info we
have,
That's a truly awesome feature! I'll shorten all my module names to
single letters tomorrow.
-- Lennart
On Tue, Dec 16, 2008 at 12:43 AM, Don Stewart d...@galois.com wrote:
dons:
Running time as a function of module name length,
http://galois.com/~dons/images/results.png
10 is the
Ditto. Can I claim the [A-Z].* hierarchies as belonging to me? :-)
--sigbjorn putting them up on eBay afterwards...maybe
On 12/15/2008 18:00, Lennart Augustsson wrote:
That's a truly awesome feature! I'll shorten all my module names to
single letters tomorrow.
-- Lennart
On Tue, Dec 16,
On Dec 15, 2008, at 10:43 PM, Don Stewart wrote:
dons:
Running time as a function of module name length,
http://galois.com/~dons/images/results.png
10 is the magic threshold, where indirections start creeping in.
Codegen cost heuristic fail?
Given this, could you open a bug ticket for
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