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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">It would be amazingly helpful if someone (anyone) could diagnose a bit.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">It may be a bug in GHC but it may also be a bug in the pragmas in a library. If someone can produce evidence for the former, I’ll gladly look at it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Greg Weber [mailto:greg@gregweber.info]
<br>
<b>Sent:</b> 01 May 2015 16:01<br>
<b>To:</b> Simon Peyton Jones<br>
<b>Cc:</b> Paolino; George Colpitts; Manuel Chakravarty; glasgow-haskell-users@haskell.org<br>
<b>Subject:</b> Re: Increased memory usage with GHC 7.10.1<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:6.0pt;margin-right:0cm;margin-bottom:6.0pt;margin-left:0cm">
We have observed issues with compile-time inlining taking much longer in newer versions of GHC in some cases<o:p></o:p></p>
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<a href="https://github.com/larskuhtz/toCaseFoldBuildTimes">https://github.com/larskuhtz/toCaseFoldBuildTimes</a><o:p></o:p></p>
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This particular issue was reported to the text repo: <a href="https://github.com/bos/text/issues/116">
https://github.com/bos/text/issues/116</a><o:p></o:p></p>
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<o:p> </o:p></p>
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On Fri, May 1, 2015 at 7:49 AM, Simon Peyton Jones <<a href="mailto:simonpj@microsoft.com" target="_blank">simonpj@microsoft.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Calibri",sans-serif">It would be great if someone could</span><o:p></o:p></p>
<p><span style="font-family:Symbol">·</span><span style="font-size:7.0pt">
</span><span style="font-family:"Calibri",sans-serif">create a ticket for Paolio</span><o:p></o:p></p>
<p><span style="font-family:Symbol">·</span><span style="font-size:7.0pt">
</span><span style="font-family:"Calibri",sans-serif">investigate what is happening</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Calibri",sans-serif">This smaller test case uses Repa, so it’s not clear that GHC is doing anything wrong. Maybe repa is inlining too much? We need insight.
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Calibri",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Calibri",sans-serif">Thanks</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Calibri",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Calibri",sans-serif">SImon</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Glasgow-haskell-users
[mailto:<a href="mailto:glasgow-haskell-users-bounces@haskell.org" target="_blank">glasgow-haskell-users-bounces@haskell.org</a>]
<b>On Behalf Of </b>Paolino<br>
<b>Sent:</b> 01 May 2015 15:30<br>
<b>To:</b> George Colpitts<br>
<b>Cc:</b> <a href="mailto:glasgow-haskell-users@haskell.org" target="_blank">glasgow-haskell-users@haskell.org</a><br>
<b>Subject:</b> Re: Increased memory usage with GHC 7.10.1</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">here is another file , which is small, which cannot be compiled within 4GB memory.<br>
<br>
<a href="https://raw.githubusercontent.com/benl23x5/gloss/master/gloss-examples/raster/Fluid/src-repa/Stage/Linear.hs" target="_blank">https://raw.githubusercontent.com/benl23x5/gloss/master/gloss-examples/raster/Fluid/src-repa/Stage/Linear.hs</a><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">I'd just want to add that this problem is a nasty one if one doesn't set the max heap: a remote machine frozen that must be rebooted is not a nice adventure , hoping the crash remains
confined to the vm.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">hth, paolino<o:p></o:p></p>
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<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">2015-05-01 15:31 GMT+02:00 George Colpitts <<a href="mailto:george.colpitts@gmail.com" target="_blank">george.colpitts@gmail.com</a>>:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"><span style="font-size:18.0pt">Should we recommend that all library developers compile their libraries with a max heap of 4G (to pick an arbitrary number) so that we can catch some of
these issues earlier?</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">On Fri, May 1, 2015 at 5:42 AM, Paolino <<a href="mailto:paolo.veronelli@gmail.com" target="_blank">paolo.veronelli@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">Hello, I'm using ghc 7.10.1 to compile OpenGLRaw which is now impossible with -O1 and -O2 due to "ghc : out of memory error" on a 4GB linux host. The file making memory explode is <a href="https://hackage.haskell.org/package/OpenGLRaw-2.4.1.0/docs/src/Graphics-Rendering-OpenGL-Raw-Functions.html" target="_blank">Graphics.Rendering.OpenGL.Raw.Functions</a>.
With -O0 it uses 600 MB. <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">The file is really huge, but I could compile it with prior versions of ghc.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">Regards
<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"><span style="color:#888888">paolino</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">2015-04-17 1:33 GMT+02:00 David Laing <<a href="mailto:dave.laing.80@gmail.com" target="_blank">dave.laing.80@gmail.com</a>>:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">Hi all,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">I've been playing around with profiling GHC recently, so I thought I'd chime in with a pointer that might save people searching for the right docs - you could configure a cabal sandbox
to work with multiple version of ghc, which I've found useful:<br>
<br>
<a href="https://www.haskell.org/cabal/users-guide/installing-packages.html#sandboxes-advanced-usage" target="_blank">https://www.haskell.org/cabal/users-guide/installing-packages.html#sandboxes-advanced-usage</a><o:p></o:p></p>
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Cheers,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">Dave<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">On Fri, Apr 17, 2015 at 6:01 AM, Michal Terepeta <<a href="mailto:michal.terepeta@gmail.com" target="_blank">michal.terepeta@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">Hi Richard,<br>
<br>
Thanks updating the ticket! What I did was: build GHC HEAD/7.8.4 with build flavor 'prof' then get the haskell-src-exts sources, install the dependencies and finally add +RTS -p -RTS to the cabal file and compile it, the resulting ghc.prof contains the profiling
information.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">For anyone interested about CallArity slowness, the problem is tracked in <a href="https://ghc.haskell.org/trac/ghc/ticket/10293" target="_blank">https://ghc.haskell.org/trac/ghc/ticket/10293</a><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">Cheers,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">Michal<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">On Wed, Apr 15, 2015 at 1:40 AM Richard Eisenberg <<a href="mailto:eir@cis.upenn.edu" target="_blank">eir@cis.upenn.edu</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:6.0pt">I've pasted Michal's numbers in #9630, which seems like a good place to track this. Michal, would you mind fleshing out a bit precisely what you did to get those numbers? That would be
helpful (though you've already been very helpful indeed in getting the data together)!<br>
<br>
Thanks,<br>
Richard<br>
<br>
On Apr 14, 2015, at 9:09 PM, Joachim Breitner <<a href="mailto:mail@joachim-breitner.de" target="_blank">mail@joachim-breitner.de</a>> wrote:<br>
<br>
> Hi,<br>
><br>
> Am Dienstag, den 14.04.2015, 21:54 +0200 schrieb Michal Terepeta:<br>
>> On Mon, Apr 13, 2015 at 10:34 PM, Christiaan Baaij<br>
>> <<a href="mailto:christiaan.baaij@gmail.com" target="_blank">christiaan.baaij@gmail.com</a>> wrote:<br>
>>> Actually, I meant only with -fno-specialise.<br>
>><br>
>> Done. Helps quite a bit but CallArity is still a pretty expensive.<br>
><br>
> I’m on that, and I think I have a quite neat fix for it. I’ll report on<br>
> that in the trac ticket:<br>
> <a href="https://ghc.haskell.org/trac/ghc/ticket/10293#comment:4" target="_blank">
https://ghc.haskell.org/trac/ghc/ticket/10293#comment:4</a><br>
><br>
> Greetings,<br>
> Joachim<br>
><br>
> --<br>
> Joachim “nomeata” Breitner<br>
> <a href="mailto:mail@joachim-breitner.de" target="_blank">mail@joachim-breitner.de</a> •
<a href="http://www.joachim-breitner.de/" target="_blank">http://www.joachim-breitner.de/</a><br>
> Jabber: <a href="mailto:nomeata@joachim-breitner.de" target="_blank">nomeata@joachim-breitner.de</a> • GPG-Key: 0xF0FBF51F<br>
> Debian Developer: <a href="mailto:nomeata@debian.org" target="_blank">nomeata@debian.org</a><br>
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