[#41916] Proposal: Bitmap Marking GC — Narihiro Nakamura <authornari@...>

Hi.

18 messages 2012/01/05

[#41941] [ruby-trunk - Bug #5851][Open] make check fails when compiling with GCC 4.7 - *** longjmp causes uninitialized stack frame *** — Vit Ondruch <v.ondruch@...>

12 messages 2012/01/06

[#41979] [ruby-trunk - Bug #5865][Open] Exception#== should return false if the classes differ — Hiro Asari <asari.ruby@...>

10 messages 2012/01/08

[#42003] [ruby-trunk - Bug #5871][Open] regexp \W matches some word characters when inside a case-insensitive character class — Gareth Adams <gareth@...>

14 messages 2012/01/09

[#42016] [ruby-trunk - Feature #5873][Open] Adopt FFI over DL — Heesob Park <phasis@...>

15 messages 2012/01/10

[#42149] [ruby-trunk - Feature #5899][Open] chaining comparsions. — Ondrej Bilka <neleai@...>

12 messages 2012/01/16

[#42164] [ruby-trunk - Feature #5903][Open] Optimize st_table (take 2) — Yura Sokolov <funny.falcon@...>

18 messages 2012/01/17

[ruby-core:41924] Re: Proposal: Bitmap Marking GC

From: Yukihiro Matsumoto <matz@...>
Date: 2012-01-05 18:07:07 UTC
List: ruby-core #41924
Hi,

In message "Re: [ruby-core:41922] Re: Proposal: Bitmap Marking GC"
    on Fri, 6 Jan 2012 01:37:28 +0900, Roger Pack <rogerdpack2@gmail.com> writes:
|
|> No, REE uses bitmap marking all the time.
|
|I don't think it does.
|
|http://www.rubyenterpriseedition.com/documentation.html#_copy_on_write_friendliness

I checked REE long time ago.  So my memory is not reliable.  Sorry.
But as far as I recall, REE's switching copy-on-write-friendliness
slows down GC.

In fact, REE's GC itself is significantly slower than stock 1.8.7.
REE + Passenger is faster just because of tcmalloc + GC parameters +
less memory consumption.

|Tunable would be nice, too :)

1.9.3 has GC tuning parameters.

|> Besides that, extra
|> complexity in GC is not a good idea.
|
|True.  As long as there's no significant slowdown.

Did you see his benchmark results?  I didn't see any significant
slowdown.

							matz.

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