From: Tadashi Saito <tad.a.digger@...>
Date: 2013-12-01T00:43:09+09:00
Subject: [ruby-core:58713] Re: [ruby-trunk - misc #8962][Assigned] [DOC] add step to enable Generational GC merits in README.EXT*

--047d7b15b25f91858204ec66cf6b
Content-Type: text/plain; charset=ISO-8859-1

ping?


2013/10/16 zzak (Zachary Scott) <e@zzak.io>

>
> Issue #8962 has been updated by zzak (Zachary Scott).
>
> Status changed from Open to Assigned
>
> Koichi, could you add some notes on this, maybe link to helpful RGenGC
> documentation.
>
> I will bug you again at RubyConf :)
> ----------------------------------------
> misc #8962: [DOC] add step to enable Generational GC merits in README.EXT*
> https://bugs.ruby-lang.org/issues/8962#change-42473
>
> Author: tad (Tadashi Saito)
> Status: Assigned
> Priority: Normal
> Assignee: zzak (Zachary Scott)
> Category: doc
> Target version: current: 2.1.0
>
>
> =begin
>
> Is there any chance to reap the benefit of new Generational GC merits for
> C-extension library authors?
>
> == Background
>
> First of all: RGenGC is great.  Ko1 showed that it could make significant
> performance improvement at RubyKaigi2013. (especially P82)
> ((<RubyKaigi2013-ko1.pdf|URL:
> http://www.atdot.net/~ko1/activities/RubyKaigi2013-ko1.pdf>))
>
> I guess the improvement is triggered by marking most (or all?) of built-in
> classes as WB-protected struct to work with Generational GC.
>
> == Motivation
>
> As an extension library author, I want to try to get the performance merit.
> But there is no document or guide to enable it.
>
> The PDF says "Inserting WBs step by step, and increase performance
> gradually",
> and I believe it is the greatest point of RGenGC, but there is no guide to
> proceed with the steps for now. It's sad.
>
> == Subject
>
> Could you write about it as a document, ko1 or anyone?
> I guess it's good to be written at ((%README.EXT*%)).
> (The case of ((%iseq.c%)) may be used as an example.)
>
> I'm glad to see the documents are written before Ruby 2.1 release.
>
> == Restriction
>
> Sorry for the absence of my knowledge.  Because I'm not good at
> RGenGC, I could't write the document by myself but could only request.
>
> PS
> I guess this issue depends on #3064 (sorry, in Japanse), the request of
> documenting (({RTypedData})), because there is no interface to specify
> (({FL_WB_PROTECTED})) flag with traditional (({RData})).
>
> =end
>
>
>
> --
> http://bugs.ruby-lang.org/
>



-- 
Tadashi Saito

--047d7b15b25f91858204ec66cf6b
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">ping?<div class=3D"gmail_extra"><br><br><div class=3D"gmai=
l_quote">2013/10/16 zzak (Zachary Scott) <span dir=3D"ltr">&lt;<a href=3D"m=
ailto:e@zzak.io" target=3D"_blank">e@zzak.io</a>&gt;</span><br><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid=
;padding-left:1ex">

<br>
Issue #8962 has been updated by zzak (Zachary Scott).<br>
<br>
Status changed from Open to Assigned<br>
<br>
Koichi, could you add some notes on this, maybe link to helpful RGenGC docu=
mentation.<br>
<br>
I will bug you again at RubyConf :)<br>
<div class=3D"im">----------------------------------------<br>
misc #8962: [DOC] add step to enable Generational GC merits in README.EXT*<=
br>
</div><a href=3D"https://bugs.ruby-lang.org/issues/8962#change-42473" targe=
t=3D"_blank">https://bugs.ruby-lang.org/issues/8962#change-42473</a><br>
<br>
Author: tad (Tadashi Saito)<br>
Status: Assigned<br>
<div class=3D"im">Priority: Normal<br>
Assignee: zzak (Zachary Scott)<br>
Category: doc<br>
Target version: current: 2.1.0<br>
<br>
<br>
=3Dbegin<br>
<br>
Is there any chance to reap the benefit of new Generational GC merits for<b=
r>
C-extension library authors?<br>
<br>
=3D=3D Background<br>
<br>
First of all: RGenGC is great. =A0Ko1 showed that it could make significant=
<br>
performance improvement at RubyKaigi2013. (especially P82)<br>
</div><div class=3D"im">((&lt;RubyKaigi2013-ko1.pdf|URL:<a href=3D"http://w=
ww.atdot.net/~ko1/activities/RubyKaigi2013-ko1.pdf" target=3D"_blank">http:=
//www.atdot.net/~ko1/activities/RubyKaigi2013-ko1.pdf</a>&gt;))<br>
<br>
</div><div class=3D"im">I guess the improvement is triggered by marking mos=
t (or all?) of built-in<br>
classes as WB-protected struct to work with Generational GC.<br>
<br>
=3D=3D Motivation<br>
<br>
</div>As an extension library author, I want to try to get the performance =
merit.<br>
<div class=3D"im">But there is no document or guide to enable it.<br>
<br>
The PDF says &quot;Inserting WBs step by step, and increase performance gra=
dually&quot;,<br>
and I believe it is the greatest point of RGenGC, but there is no guide to<=
br>
proceed with the steps for now. It&#39;s sad.<br>
<br>
=3D=3D Subject<br>
<br>
Could you write about it as a document, ko1 or anyone?<br>
</div><div class=3D"im">I guess it&#39;s good to be written at ((%README.EX=
T*%)).<br>
</div>(The case of ((%iseq.c%)) may be used as an example.)<br>
<div class=3D"im HOEnZb"><br>
I&#39;m glad to see the documents are written before Ruby 2.1 release.<br>
<br>
=3D=3D Restriction<br>
<br>
Sorry for the absence of my knowledge. =A0Because I&#39;m not good at<br>
RGenGC, I could&#39;t write the document by myself but could only request.<=
br>
<br>
PS<br>
I guess this issue depends on #3064 (sorry, in Japanse), the request of<br>
</div><div class=3D"HOEnZb"><div class=3D"h5">documenting (({RTypedData})),=
 because there is no interface to specify<br>
(({FL_WB_PROTECTED})) flag with traditional (({RData})).<br>
<br>
=3Dend<br>
<br>
<br>
<br>
--<br>
<a href=3D"http://bugs.ruby-lang.org/" target=3D"_blank">http://bugs.ruby-l=
ang.org/</a><br>
</div></div></blockquote></div><br><br clear=3D"all"><br>-- <br></div><div =
class=3D"gmail_extra">Tadashi Saito
</div></div>

--047d7b15b25f91858204ec66cf6b--