On 16/02/2011 12:46, Sebastiaan Visser wrote:
On Feb 12, 2011, at 6:08 PM, Antoine Latter wrote:
On Sat, Feb 12, 2011 at 8:47 AM, Sebastiaan Visserhask...@fvisser.nl wrote:
Hi all,
During a little experiment I discovered there is no MonadFix instance available
for the STM monad. Is this
On 24/02/2011 13:26, José Pedro Magalhães wrote:
(Forwarding to haskell-cafe)
Hi,
I have a program that computes a matrix of Floats of m rows by n
columns. Computing each Float is relatively expensive. Each line is
completely independent of the others, so I thought I'd try some simple
SMP
On 28/02/11 15:59, Bas van Dijk wrote:
On 25 February 2011 19:10, Bas van Dijkv.dijk@gmail.com wrote:
On 25 February 2011 18:27, sclvs.clo...@gmail.com wrote:
Bas van Dijk-2 wrote:
I believe the OS threads are created by my levmar library. This
library uses bindings-levmar[4] which
On 10/03/11 18:20, Bas van Dijk wrote:
On 10 March 2011 18:11, Simon Marlowmarlo...@gmail.com wrote:
On 28/02/11 15:59, Bas van Dijk wrote:
On 25 February 2011 19:10, Bas van Dijkv.dijk@gmail.comwrote:
On 25 February 2011 18:27, sclvs.clo...@gmail.comwrote:
Bas van Dijk-2
Hi José,
On 11/03/2011 14:16, José Pedro Magalhães wrote:
I've played a bit with Intel's Manycore Testing Lab
(http://software.intel.com/en-us/articles/intel-many-core-testing-lab/).
Part of the agreement to use it requires that you report back your
experiences, which I did in an Intel forum
On 14/03/2011 10:33, Christian Maeder wrote:
Am 14.03.2011 06:26, schrieb C K Kashyap:
Looks like a job for Data.Binary.
I'd like to use it with just the libraries that are part of the
platform
I forgot to mention, Data.Binary does not seem to be in the platform.
Right, it
On 06/05/2011 16:56, dm-list-haskell-c...@scs.stanford.edu wrote:
At Fri, 6 May 2011 10:15:50 +0200,
Gregory Collins wrote:
Hi David,
Re: this comment from catchI:
It is not possible to catch asynchronous exceptions, such as
lazily evaluated divide-by-zero errors, the throw function, or
On 11/05/2011 23:57, dm-list-haskell-c...@scs.stanford.edu wrote:
At Wed, 11 May 2011 13:02:21 +0100,
Simon Marlow wrote:
However, if there's some simpler way to guarantee that= is the
point where exceptions are thrown (and might be the case for GHC in
practice), then I basically only need
On 12/05/2011 16:04, David Mazieres expires 2011-08-10 PDT wrote:
At Thu, 12 May 2011 09:57:13 +0100,
Simon Marlow wrote:
So to answer my own question from earlier, I did a bit of
benchmarking, and it seems that on my machine (a 2.4 GHz Intel Xeon
3060, running linux 2.6.38), I get
On 12/05/2011 18:24, dm-list-haskell-c...@scs.stanford.edu wrote:
At Thu, 12 May 2011 16:45:02 +0100,
Simon Marlow wrote:
There are no locks here, thanks to the message-passing implementation we
use for throwTo between processors.
Okay, that sounds good. So then there is no guarantee about
On 13/05/2011 21:12, Bernie Pope wrote:
On 13 May 2011 19:06, Simon Marlow marlo...@gmail.com
mailto:marlo...@gmail.com wrote:
As far as memory consistency goes, we claim to provide sequential
consistency for IORef and IOArray operations, but not for peeks and
pokes.
Hi Simon
On 16/05/11 20:31, dm-list-haskell-c...@scs.stanford.edu wrote:
At Mon, 16 May 2011 10:56:02 +0100,
Simon Marlow wrote:
Yes, it's not actually documented as far as I know, and we should fix
that. But if you think about it, sequential consistency is really the
only sensible policy: suppose one
On 17/05/2011 00:44, dm-list-haskell-c...@scs.stanford.edu wrote:
But I've never heard anyone claim that a prerequisite to Haskell being
useful as a parallel programming language is a well-defined memory
model. I think there's a couple of reasons for that:
- deterministic parallel
On 18/05/2011 19:22, Jason Dagit wrote:
On Wed, May 18, 2011 at 2:50 AM, John Sneerjohnsn...@operamail.com wrote:
Hello all,
I know it is not probably good question to this list, but anyway,
could anyone point me to some more detailed how to where is
described building of Haskell
On 23/05/2011 09:55, Erik Hesselink wrote:
On Sun, May 22, 2011 at 15:03, Johannes Waldmann
waldm...@imn.htwk-leipzig.de wrote:
I think you should file a bug report with a test case
on GHC.
I am willing to work on this, but I thought I'd go fishing for some
advice first. My program uses:
On 26/05/2011 14:32, michael rice wrote:
Fair question. I copied the parallel version from:
http://www.haskell.org/ghc/docs/6.6/html/users_guide/lang-parallel.html
http://www.haskell.org/ghc/docs/6.6/html/users_guide/lang-parallel.html
That is the User Guide for GHC 6.6, incidentally. If
On 27/05/2011 08:35, Emil Axelsson wrote:
Hello!
Lacking a proper blog, I've written some notes about Data.Unique here:
http://community.haskell.org/~emax/darcs/MoreUnique/
This describes a real problem that makes Data.Unique unsuitable for
implementing observable sharing.
The document also
On 27/05/2011 13:40, Emil Axelsson wrote:
2011-05-27 13:12, Simon Marlow skrev:
On 27/05/2011 08:35, Emil Axelsson wrote:
Hello!
Lacking a proper blog, I've written some notes about Data.Unique here:
http://community.haskell.org/~emax/darcs/MoreUnique/
This describes a real problem
On 26/05/2011 15:35, Simon Marlow wrote:
CamHac is happening - come and spend a long weekend in Cambridge hacking
Haskell code in great surroundings with fantastic company!
Full details on the wiki page:
http://www.haskell.org/haskellwiki/CamHac
When: Friday-Sunday 12-14 August 2011
Where
On 06/06/11 15:57, Daniel Peebles wrote:
Isn't gcc just used for its assembler and object file creation, these
days, now that via-C is deprecated? Or are there other parts of it that
are needed?
The C compiler is needed to support foreign export and foreign import
wrapper, and we also
On 13/06/2011 15:23, Henning Thielemann wrote:
On Thu, 19 May 2011, Simon Marlow wrote:
I've put together a tutorial on Parallel and Concurrent programming in
Haskell, here:
http://community.haskell.org/~simonmar/par-tutorial.pdf
The main reason for writing this was that I needed some
On 12/06/2011 20:17, Jason Dagit wrote:
On Sun, Jun 12, 2011 at 11:45 AM, Brandon Allberyallber...@gmail.com wrote:
On Sun, Jun 12, 2011 at 14:31, Jason Dagitdag...@gmail.com wrote:
If I build the C library as a .a, then ghci comlains that it cannot
open the .dylib. My first question is:
On 14/06/2011 17:57, Jason Dagit wrote:
On Tue, Jun 14, 2011 at 4:26 AM, Simon Marlowmarlo...@gmail.com wrote:
On 12/06/2011 20:17, Jason Dagit wrote:
On Sun, Jun 12, 2011 at 11:45 AM, Brandon Allberyallber...@gmail.com
wrote:
On Sun, Jun 12, 2011 at 14:31, Jason Dagitdag...@gmail.com
On 15/06/2011 15:41, Jason Dagit wrote:
On Wed, Jun 15, 2011 at 2:16 AM, Simon Marlowmarlo...@gmail.com wrote:
On 14/06/2011 17:57, Jason Dagit wrote:
On Tue, Jun 14, 2011 at 4:26 AM, Simon Marlowmarlo...@gmail.comwrote:
On 12/06/2011 20:17, Jason Dagit wrote:
On Sun, Jun 12, 2011 at
I found this email thanks to the Parallel Haskell Digest, thanks Eric
Nick!
On 01/04/2011 11:37, Herbert Valerio Riedel wrote:
I'm experiencing an unexpected behaviour with GHC-7.0.3/x86_64's
multithreading runtime when running some more demanding single-thread
computations.
I've isolated
On 21/06/2011 10:02, Herbert Valerio Riedel wrote:
Hello Simon,
On Fri, 2011-06-17 at 09:05 +0100, Simon Marlow wrote:
What's happening there? The actual processing work seems to be done in a
single HEC... but what are the remaining 11 HECs doing exactly? Am I
doing something wrong
On 26/06/2011 09:31, Paterson, Ross wrote:
If this is the case, then multiple sentences in the 2010 report don't
make sense, though the way in which they don't make sense sort of
depends on what simple pattern binding means.
Indeed, the Report has two problems:
Sections 4.4.3.2 and 4.5.5 have
On 04/07/11 06:02, Jason Dagit wrote:
Hello,
I'm trying to get some GUI code working on OSX and numerous forums
around the internet keep reiterating that on OSX to correctly handle
GUI events you need to use the original thread allocated to your
process to check for events and to call the Cocoa
On 05/07/2011 20:33, Ian Lynagh wrote:
On Tue, Jul 05, 2011 at 08:11:21PM +0100, Simon Marlow wrote:
In GHCi it's a different matter, because the main thread is running
GHCi itself, and all the expressions/statements typed at the prompt
are run in forkIO'd threads (a new one for each statement
On 05/07/2011 20:38, Jason Dagit wrote:
On Tue, Jul 5, 2011 at 12:11 PM, Simon Marlowmarlo...@gmail.com wrote:
On 04/07/11 06:02, Jason Dagit wrote:
Hello,
I'm trying to get some GUI code working on OSX and numerous forums
around the internet keep reiterating that on OSX to correctly handle
On 06/07/2011 07:37, Jason Dagit wrote:
On Jul 5, 2011 1:04 PM, Jason Dagit dag...@gmail.com
mailto:dag...@gmail.com wrote:
On Tue, Jul 5, 2011 at 12:33 PM, Ian Lynagh ig...@earth.li
mailto:ig...@earth.li wrote:
On Tue, Jul 05, 2011 at 08:11:21PM +0100, Simon Marlow wrote:
In GHCi
...@earth.li
mailto:ig...@earth.li wrote:
On Tue, Jul 05, 2011 at 08:11:21PM +0100, Simon Marlow wrote:
In GHCi it's a different matter, because the main thread is running
GHCi itself, and all the expressions/statements typed at the prompt
are run in forkIO'd threads (a new
, Jason Dagitdag...@gmail.com
mailto:dag...@gmail.comwrote:
On Tue, Jul 5, 2011 at 12:33 PM, Ian Lynaghig...@earth.li
mailto:ig...@earth.liwrote:
On Tue, Jul 05, 2011 at 08:11:21PM +0100, Simon Marlow wrote:
In GHCi it's a different matter, because the main
On 06/07/11 17:14, David Barbour wrote:
On Wed, Jul 6, 2011 at 8:09 AM, Simon Marlow marlo...@gmail.com
mailto:marlo...@gmail.com wrote:
On 06/07/2011 15:42, Jason Dagit wrote:
How can I make sure my library works from GHC (with arbitrary
user threads) and from GHCI
:
On 06/07/2011 07:37, Jason Dagit wrote:
On Jul 5, 2011 1:04 PM, Jason Dagitdag...@gmail.com
mailto:dag...@gmail.comwrote:
On Tue, Jul 5, 2011 at 12:33 PM, Ian Lynaghig...@earth.li
mailto:ig...@earth.liwrote:
On Tue, Jul 05, 2011 at 08:11:21PM +0100, Simon Marlow wrote
On 06/07/2011 21:11, David Barbour wrote:
On Wed, Jul 6, 2011 at 12:52 PM, Simon Marlow marlo...@gmail.com
mailto:marlo...@gmail.com wrote:
I think the real issue is that GHC has a different behavior than
GHCi,
and I think this causes a lot of difficulties for people
On 06/07/2011 21:19, Jason Dagit wrote:
On Wed, Jul 6, 2011 at 12:52 PM, Simon Marlowmarlo...@gmail.com wrote:
On 06/07/11 17:14, David Barbour wrote:
On Wed, Jul 6, 2011 at 8:09 AM, Simon Marlowmarlo...@gmail.com
mailto:marlo...@gmail.com wrote:
On 06/07/2011 15:42, Jason Dagit
On 07/07/2011 08:41, Simon Marlow wrote:
On 06/07/2011 21:19, Jason Dagit wrote:
On Wed, Jul 6, 2011 at 12:52 PM, Simon Marlowmarlo...@gmail.com wrote:
On 06/07/11 17:14, David Barbour wrote:
On Wed, Jul 6, 2011 at 8:09 AM, Simon Marlowmarlo...@gmail.com
mailto:marlo...@gmail.com wrote
On 03/06/2011 13:10, John D. Ramsdell wrote:
I've enjoyed reading Simon Marlow's new tutorial on parallel and
concurrent programming, and learned some surprisingly basic tricks. I
didn't know about the '-s' runtime option for printing statistics. I
decided to compute speedups for a program I
Hi Folks,
There is a place available at CamHac next Friday-Sunday (12-14 August).
First come first served! For instructions on how to register, see the
wiki page:
http://www.haskell.org/haskellwiki/CamHac#Registration
Also a reminder, if you have already registered but won't be able to
On 09/08/2011 22:24, Eugene Kirpichov wrote:
Hi Simon,
I found a bug in alex-3.0 and I'm attaching a fixed source file -
templates/wrappers.hs (modified against alex-3.0 from cabal unpack).
Explanation:
I was installing bytestring-lexing 0.2.1 and it failed to install with
alex 3.0, which was
On 08/10/2011 01:47, austin seipp wrote:
It's GHC, and partly the OS scheduler in some sense. Oversaturating,
i.e. using an -N option your number of logical cores (including
hyperthreads) will slow down your program typically. This isn't
uncommon, and is well known - GHC's lightweight threads
On 10/10/2011 15:44, Tom Thorne wrote:
thanks! I just tried setting -A32M and this seems to fix the parallel GC
problems, I now get a speedup with parallel GC on and performance is the
same as passing -qg. I had tried -H before and it only made things
worse, but -A seems to do the trick.
I'm
This is an interesting problem, I think I might incorporate parts of it
into the next revision of my Concurrent Haskell tutorial.
It sounds like you're getting overwhelmed by several different problems,
and dealing with them separately would probably help. e.g. you want
some infrastructure
On 06/02/2012 20:32, Ian Lynagh wrote:
On Sun, Feb 05, 2012 at 07:17:32PM -0800, John Millikin wrote:
That was my understanding also, then QuickCheck found a
counter-example. It turns out that there are cases where a valid path
cannot be roundtripped in the GHC 7.2 encoding.
This is fixed in
On 08/02/2012 02:26, John Meacham wrote:
On Tue, Feb 7, 2012 at 4:24 AM, Simon Marlowmarlo...@gmail.com wrote:
Separately the unix package added support for undecoded FilePaths
(RawFilePath), but unfortunately at the same time we started using a new
extension in GHC 7.4.1 (CApiFFI), which we
There is a possibility that the IHG might fund this during the next
cycle, which would mean that it would be in 7.6.1.
Cheers,
Simon
On 05/03/2012 07:35, Jason Dagit wrote:
I don't know if timeline has been established, but my understanding is
that there is a need for this and that
On 27/03/2012 08:56, rajendra prasad wrote:
Hi,
I am trying to load the DLL(Wrapper.dll) in my code(Main.hs). When I am
placing the dll in local directory, I am able to load it through
following command:
ghci Main.hs -L. -lWrapper
But, I am not able to load it if I am putting it in some
, Mar 28, 2012 at 2:09 PM, Simon Marlow marlo...@gmail.com
mailto:marlo...@gmail.com wrote:
On 27/03/2012 08:56, rajendra prasad wrote:
Hi,
I am trying to load the DLL(Wrapper.dll) in my code(Main.hs).
When I am
placing the dll in local directory, I am able to load
On 25/04/2012 17:28, Ozgur Akgun wrote:
Hi,
On 25 April 2012 16:36, Michael Snoyman mich...@snoyman.com
mailto:mich...@snoyman.com wrote:
Prelude.head: empty list
Recent versions of GHC actually generate a very helpful stack trace, if
the program is compiled with profiling
On 06/05/2012 07:40, Janek S. wrote:
a couple of times I've encountered a statement that Haskell programs
can have performance comparable to programs in C/C++. I've even read
that thanks to functional nature of Haskell, compiler can reason and
make guarantess about the code and use that
On 15/08/2012 21:44, Johan Tibell wrote:
On Wed, Aug 15, 2012 at 1:02 PM, Brandon Allbery allber...@gmail.com wrote:
So we are certain that the rounds of failures that led to their being
*added* will never happen again?
It would be useful to have some examples of these. I'm not sure we had
On 08/10/2012 20:11, Mikhail Glushenkov wrote:
Hello,
It's a relatively well-known fact that GHC allows for multiple type
class instances for the same type to coexist in a single program. This
can be used, for example, to construct values of the type Data.Set.Set
that violate the data structure
On 10/12/12 00:11, Nils wrote:
I'm currently working with a C library that needs to use/modify global C
variables, for example:
igraph_bool_t igraphhaskell_initialized = 0;
int igraphhaskell_initialize()
{
if (igraphhaskell_initialized != 0)
{
printf(C: Not
keep an eye on the
thread.
Cheers,
Simon
On 08/03/13 08:36, Gregory Collins wrote:
+Simon Marlow
A couple of comments:
* maybe we shouldn't back the file by a Handle. io-streams does this
by default out of the box; I had a posix file interface for unix
(guarded by CPP
Great to hear that we're getting some payoff for the switch to dynamic
linking in GHCi. Thanks for testing!
Cheers
Simon
On 02/10/2013 07:23, Paul Liu wrote:
Thanks. I've just built GHC HEAD on Mac OS X Lion, and tested by
installing libraries with --enable-shared and loading a GLFW program
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