[#40602] [ruby-trunk - Bug #5532][Open] Compile problem for bigdecimal on cygwin — Martin Dürst <duerst@...>

14 messages 2011/11/01

[#40617] [ruby-trunk - Feature #5534][Open] Redefine Range class and introduce RelativeNumeric and RelativeRange — Alexey Muranov <muranov@...>

17 messages 2011/11/01

[#40646] [ruby-trunk - Bug #5541][Open] Better configure error message when llvm-gcc is the default compiler — Eric Hodel <[email protected]>

10 messages 2011/11/01

[#40648] [ruby-trunk - Feature #5543][Open] rb_thread_blocking_region() API is poorly designed — Christopher Huff <cjameshuff@...>

14 messages 2011/11/01

[#40684] [ruby-trunk - Feature #5555][Open] rename #include? to #includes? — Alexey Muranov <muranov@...>

20 messages 2011/11/02

[#40688] [ruby-trunk - Bug #5556][Open] SIGHUP no longer ignored when sent to process group from a subprocess — Brian Ford <brixen@...>

12 messages 2011/11/02

[#40706] [ruby-trunk - Feature #5562][Open] Improvement of Windows IO performance — Hiroshi Shirosaki <h.shirosaki@...>

39 messages 2011/11/03

[#40737] [ruby-trunk - Bug #5570][Open] Encoding of environment variables on Windows — Nikolai Weibull <now@...>

11 messages 2011/11/04

[#40748] Proposal for sustainable branch maintenance — "Yuki Sonoda (Yugui)" <yugui@...>

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14 messages 2011/11/05

[#40770] [ruby-trunk - Feature #5578][Open] Embedded YAML for Ruby 2.0 — Thomas Sawyer <transfire@...>

17 messages 2011/11/06

[#40806] [ruby-trunk - Feature #5583][Open] Optionally typing — Yasushi ANDO <andyjpn@...>

21 messages 2011/11/07

[#40824] [ruby-trunk - Feature #5588][Open] add negation flag (v) to Regexp — Suraj Kurapati <sunaku@...>

38 messages 2011/11/08

[#40865] IO.copy_stream creates files with restrictive permissions — Eric Wong <normalperson@...>

I'm not sure if this is a bug or intended as spec.

16 messages 2011/11/09
[#41151] Re: IO.copy_stream creates files with restrictive permissions — Tanaka Akira <akr@...> 2011/11/19

2011/11/9 Eric Wong <[email protected]>:

[#41166] Re: IO.copy_stream creates files with restrictive permissions — KOSAKI Motohiro <kosaki.motohiro@...> 2011/11/20

>> I noticed when a file name argument is passed to the IO.copy_stream, the

[#41168] Re: IO.copy_stream creates files with restrictive permissions — Clifford Heath <clifford.heath@...> 2011/11/20

On 20/11/2011, at 5:09 PM, KOSAKI Motohiro wrote:

[#41176] Re: IO.copy_stream creates files with restrictive permissions — Tanaka Akira <akr@...> 2011/11/21

2011/11/20 Clifford Heath <[email protected]>:

[#41180] Re: IO.copy_stream creates files with restrictive permissions — KOSAKI Motohiro <kosaki.motohiro@...> 2011/11/21

>> I think documentation is the wrong answer. The security defects are not caused

[#40908] [ruby-trunk - Feature #5607][Open] Inconsistent reaction in Range of String — Yen-Nan Lin <redmine@...>

15 messages 2011/11/10

[#40941] [ruby-trunk - Feature #5617][Open] Allow install RubyGems into dediceted directory — Vit Ondruch <v.ondruch@...>

22 messages 2011/11/11

[#40951] [Backport93 - Backport #5621][Open] Please backport thread-safe autoloading patch — Mike Perham <mperham@...>

25 messages 2011/11/12
[#40971] [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Mike Perham <mperham@...> 2011/11/12

[#40972] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Yehuda Katz <wycats@...> 2011/11/12

Unfortunately ruby-head has a deadlock in one of my go-to scenarios for

[#40976] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Hiroshi Nakamura <nahi@...> 2011/11/13

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[#41128] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Charles Oliver Nutter <headius@...> 2011/11/18

On Sat, Nov 12, 2011 at 7:24 PM, Hiroshi Nakamura <[email protected]> wrote:

[#41129] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Hiroshi Nakamura <nahi@...> 2011/11/18

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[#41142] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Charles Oliver Nutter <headius@...> 2011/11/18

On Fri, Nov 18, 2011 at 12:15 AM, Hiroshi Nakamura <[email protected]> wro=

[#40982] [ruby-trunk - Bug #5625][Open] Remove profanity and pejoratives — Andrew Grimm <andrew.j.grimm@...>

30 messages 2011/11/13

[#41004] [ruby-trunk - Feature #5628][Open] Module#basename — Thomas Sawyer <transfire@...>

18 messages 2011/11/14

[#41024] [ruby-trunk - Feature #5632][Open] Attempt to open included class shades it instead. — Boris Stitnicky <boris@...>

12 messages 2011/11/14

[#41025] Proposal to add new methods: positive? negative? natural? — JosFrancisco Calvo Moreno <josefranciscocalvo@...>

Hi all!

11 messages 2011/11/14
[#41027] Re: Proposal to add new methods: positive? negative? natural? — Jeremy Evans <code@...> 2011/11/14

On 11/15 12:58, Jos? Francisco Calvo Moreno wrote:

[#41031] Re: Proposal to add new methods: positive? negative? natural? — JosFrancisco Calvo Moreno <josefranciscocalvo@...> 2011/11/14

Hi Jeremy,

[#41038] [ruby-trunk - Bug #5634][Open] yield and binding — Thomas Sawyer <transfire@...>

17 messages 2011/11/14

[#41086] [ruby-trunk - Feature #5644][Open] add Enumerable#exclude? antonym — Suraj Kurapati <sunaku@...>

14 messages 2011/11/17

[#41175] [ruby-trunk - Feature #5654][Open] Introduce global lock to avoid concurrent require — Hiroshi Nakamura <nakahiro@...>

12 messages 2011/11/21

[#41200] [ruby-trunk - Bug #5659][Open] bug releasing a gem created with rails 3.1 — Vinicius Gati <viniciusgati@...>

14 messages 2011/11/22

[#41212] [ruby-trunk - Feature #5662][Open] inject-accumulate, or Haskell's mapAccum* — Edvard Majakari <edvard.majakari@...>

12 messages 2011/11/22

[#41213] [ruby-trunk - Bug #5663][Open] Combined map/select method — Yehuda Katz <wycats@...>

62 messages 2011/11/22

[#41317] [ruby-trunk - Bug #5676][Open] miniruby linking error: undefined reference to ___stack_chk_guard — Martin Dürst <duerst@...>

10 messages 2011/11/27

[#41404] [ruby-trunk - Bug #5690][Open] Module#qualified_const_get — Yehuda Katz <wycats@...>

31 messages 2011/11/30

[ruby-core:40821] Re: [Ruby 1.9 - Bug #5138][Open] Add nonblocking IO that does not use exceptions for EOF and EWOULDBLOCK

From: Eric Wong <normalperson@...>
Date: 2011-11-07 21:59:38 UTC
List: ruby-core #40821
Yehuda Katz <[email protected]> wrote:
> Bug #5138: Add nonblocking IO that does not use exceptions for EOF and EWOULDBLOCK

I don't want this issue to get dropped, so I'm summarizing the
discussion so far for the benefit of folks who haven't followed
everything (including discussions in related threads to this one).

* readpartial + IO.select can still block indefinitely due to:

  - user space layers and buffering (SSL, gzip/zlib)

  - spurious wakeup on some socket types/kernels

* Exceptions with the current *_nonblock methods are expensive.

  - extending with IO::Wait* increments the global VM state version

    * This invalidates both the global method cache and inline caches in
      1.9.3.  Invaliding the caches is itself an inexpensive operation
      since 1.9.3, but the cost of subsequent cache misses can hurt[1]

    * This can overflow VM state version within a couple of hours/days
      on 32-bit systems if IO::Wait* exceptions are raised constantly.
      Overflowing state version may trigger very rare bugs with
      false-positive cache hits; vm_clear_all_inline_method_cache() is
      currently unimplemented to deal with this situation.
      Overflow is not likely to ever be a problem on 64-bit.

  - backtrace generation cost

    * Generating backtrace is more expensive in MRI 1.9/2.x than MRI 1.8,
      it might be even more expensive in alternative VMs

    * Additional garbage overhead from backtrace strings

* IO::Wait*/Errno::EAGAIN are very common exceptions.

  - Anybody using *_nonblock will need to care for exceptions with a
    begin/rescue.  Changing begin/rescue into the equivalent
    case statement requires roughly the same amount of code.

  - These exceptions make $DEBUG unnecessarily noisy


[1] - I haven't done extensive benchmarking on method cache/inline cache
      effectiveness in MRI.  More experienced MRI developers should know
      more about this topic than I do.

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