[#396148] Facebook Group — Moses Aronov <mosesaro@...>

There is a facebook group that was recently created so we could all communicate with other fellow developers

13 messages 2012/06/05
[#396178] Re: Facebook Group — Chad Perrin <code@...> 2012/06/06

On Wed, Jun 06, 2012 at 01:55:48AM +0900, Moses Aronov wrote:

[#396186] Inexplicable Argument Error — Doug Jolley <lists@...>

I am encountering a very strange argument error. I simplified my code

12 messages 2012/06/06

[#396229] Thread#kill is not rescued by "rescue Exception" — Iñaki Baz Castillo <ibc@...>

Hi, let me show this easy code:

13 messages 2012/06/07

[#396333] Is "a,b=c,d" atomic? or do I need a Mutex? — Iñaki Baz Castillo <ibc@...>

Hi, I have two methods that could be called by different threads and

10 messages 2012/06/10

[#396357] ffi - Popping image on top of the screen — "Damián M. González" <lists@...>

Ey guys, how are you? I`m developing an application in Ruby, using

12 messages 2012/06/11

[#396373] Why should I learn ruby? — Kasper Steensig <lists@...>

I have wondered whether I should learn ruby or python hence they are

16 messages 2012/06/11

[#396503] Syntax Highlighter — Intransition <transfire@...>

Would you agree that Ruby shouldn't lack for a syntax highlighting library

18 messages 2012/06/14

[#396589] Unsubcripe — Suresh Rajkumar <sureshrajchennai@...>

Unsubcipe my mail address from the group.

13 messages 2012/06/18

[#396615] Symbols and Strings... — Hal Fulton <rubyhacker@...>

Hello, all...

29 messages 2012/06/18
[#396620] Re: Symbols and Strings... — Eric Hodel <drbrain@...7.net> 2012/06/18

On Jun 18, 2012, at 15:09, Hal Fulton wrote:

[#396641] Re: Symbols and Strings... — Robert Klemme <shortcutter@...> 2012/06/19

On Tue, Jun 19, 2012 at 12:31 AM, Eric Hodel <drbrain@segment7.net> wrote:

[#396643] Re: Symbols and Strings... — Hal Fulton <rubyhacker@...> 2012/06/19

Personally, I don't have a problem with "reducing the contract"

[#396646] Re: Symbols and Strings... — Robert Klemme <shortcutter@...> 2012/06/19

On Tue, Jun 19, 2012 at 5:17 PM, Hal Fulton <rubyhacker@gmail.com> wrote:

[#396659] Re: Symbols and Strings... — Hal Fulton <rubyhacker@...> 2012/06/19

> > Freezing an object also reduces its contract.

[#396678] Re: Symbols and Strings... — Robert Klemme <shortcutter@...> 2012/06/20

On Tue, Jun 19, 2012 at 10:12 PM, Hal Fulton <rubyhacker@gmail.com> wrote:

[#396701] Re: Symbols and Strings... — Henry Maddocks <hmaddocks@...> 2012/06/20

[#396702] Re: Symbols and Strings... — Bartosz Dziewoński <matma.rex@...> 2012/06/20

2012/6/20 Henry Maddocks <hmaddocks@me.com>:

[#396703] Re: Symbols and Strings... — Henry Maddocks <hmaddocks@...> 2012/06/20

[#396710] Re: Symbols and Strings... — Jeremy Bopp <jeremy@...> 2012/06/20

On 06/20/2012 03:58 PM, Henry Maddocks wrote:

[#396627] Does ERB have recursive template support? — Todd Wei <lists@...>

I want to use ERB template library to do some code generation. It

10 messages 2012/06/19

[#396649] Looking for a better way to add a method to a core class than monkey patching — Iain Barnett <iainspeed@...>

Hi all,

17 messages 2012/06/19
[#396670] Re: Looking for a better way to add a method to a core class than monkey patching — Avdi Grimm <groups@...> 2012/06/20

Please do not monkey patch core libraries in gems, unless the *purpose* of

[#396685] Benchmark obsession? — "Jan E." <lists@...>

Hi,

23 messages 2012/06/20
[#396709] Re: Benchmark obsession? — Ryan Davis <ryand-ruby@...> 2012/06/20

[#396815] Array#sample is Set#sample and not Array#sample ! — Michel Demazure <lists@...>

Arrays are ordered, sets are not. Sampling an array should give random

11 messages 2012/06/25

[#396877] CSV.open problem, help please — Kaye Ng <lists@...>

This code doesn't seem to work

21 messages 2012/06/27

[#396896] Copying text from MS Word and wrapping in HTML - help please — Adam Holloway <lists@...>

Hi,

11 messages 2012/06/27

[#396966] Interactions between 'new' and 'initialize' ? — Cees Zeelenberg <lists@...>

In JRuby, I am extending an existing Java Class with a Ruby initialising

9 messages 2012/06/28

[#396975] stack level too deep for quicksort code — bei zhao <lists@...>

Hi, below is my quicksort implementation in ruby(using the first element

12 messages 2012/06/28

[#396996] Accessor Methods with a Twist — Doug Jolley <lists@...>

I am surprised that the code shown below returns, 'Doug'. I would

15 messages 2012/06/29

[#397001] ruby performance — anaray anaray <lists@...>

Hi,

33 messages 2012/06/29
[#397007] Re: ruby performance — Bartosz Dziewoński <matma.rex@...> 2012/06/29

The MRI is, unfortunately, slow as balls, and there's not much you can

[#397008] Re: ruby performance — Hans Mackowiak <lists@...> 2012/06/29

Bartosz Dziewo=C5=84ski wrote in post #1066673:

[#397010] Re: ruby performance — Bartosz Dziewoński <matma.rex@...> 2012/06/29

2012/6/29 Hans Mackowiak <lists@ruby-forum.com>:

[#397011] Re: ruby performance — Bartosz Dziewoński <matma.rex@...> 2012/06/29

2012/6/29 Hans Mackowiak <lists@ruby-forum.com>:

[#397047] Re: ruby performance — "Andreas S." <lists@...> 2012/07/01

Bartosz Dziewo=C5=84ski wrote in post #1066681:

[#397048] Re: ruby performance — Bartosz Dziewoński <matma.rex@...> 2012/07/01

2012/7/1 Andreas S. <lists@ruby-forum.com>:

[#397068] Re: ruby performance — Robert Klemme <shortcutter@...> 2012/07/02

On Sun, Jul 1, 2012 at 1:42 PM, Bartosz Dziewo=C5=84ski <matma.rex@gmail.co=

[#397086] Re: ruby performance — Dan Connelly <lists@...> 2012/07/02

Here's my contribution:

Re: Deadlock in large vm_xmalloc while doing backtrace

From: William Paulson <billpaulson@...>
Date: 2012-06-06 13:42:21 UTC
List: ruby-talk #396177
> Bill Paulson =D0=BF=D0=B8=D1=81=D0=B0=D0=BB 05.06.2012 22:52:
>> I work on a fairly large Ruby application that runs as a daemon,
>> accepting requests for test jobs and distributing them. It runs on Ruby
>> 1.9.1-p429 currently on Linux Redhat 5. The job scheduler ("foreman")
>> occasionally locks up in one site or another with a stack trace for the
>> main thread that looks like the following (many levels of stack elided):
>=20
> 1.9.1 is something of a danger sign for me: it never worked good enough fo=
r
> production, at least for me.
I'll look into changing to a later release.

>=20
>>=20
>> Thread 4 (process 5488):
>> #0  0x00d4d410 in __kernel_vsyscall ()
>> #1  0x00d1a0b9 in __lll_lock_wait () from /lib/libpthread.so.0
>> #2  0x00d15834 in _L_lock_92 () from /lib/libpthread.so.0
>> #3  0x00d1534a in pthread_mutex_lock () from /lib/libpthread.so.0
>> #4  0x0811d82e in native_mutex_lock (lock=3D0xfffffffc) at
>> thread_pthread.c:36
>> #5  0x081226a6 in rb_thread_call_with_gvl (func=3D0x8062b40 <gc_with_gvl>=
,
>> data1=3D0x81954e0) at thread.c:984
>> #6  0x0806282e in garbage_collect_with_gvl (objspace=3D0x81954e0) at
>> gc.c:598
>> #7  0x080628a6 in vm_xmalloc (objspace=3D0x81954e0, size=3D160796684) at
>> gc.c:624
>> #8  0x080de09e in rb_str_buf_new (capa=3D128) at string.c:722
>> #9  0x080d29bb in rb_enc_vsprintf (enc=3D0x0, fmt=3D0x81552ac "%s:%d:in
>> `%s'", ap=3D0xbf8f95e4 "X!?\t\"") at sprintf.c:1125
>> #10 0x080d2a50 in rb_vsprintf (fmt=3D0x81552ac "%s:%d:in `%s'",
>> ap=3D0xbf8f95e4 "X!?\t\"") at sprintf.c:1154
>> #11 0x080d2a7b in rb_sprintf (format=3D0x81552ac "%s:%d:in `%s'") at
>> sprintf.c:1164
>> #12 0x0810ef01 in vm_backtrace_each (th=3D<value optimized out>,
>> limit_cfp=3D0xb7fbea98, cfp=3D0xb7fbed98, file=3D0x9a42158
>> "/local/pete/current/com.rb", line_no=3D34, ary=3D174937756) at vm.c:714
>> #13 0x0810fd32 in rb_f_caller (argc=3D0, argv=3D0xb7f3f1f8) at vm.c:746
>> #14 0x0810dea6 in call_cfunc (func=3D0x810fca0 <rb_f_caller>,
>> recv=3D165378108, len=3D128, argc=3D-4, argv=3D0xb7f3f1f8) at
>> vm_insnhelper.c:286
>>=20
>> The foreman's apparently trying to lock the Global Vm Lock to do a
>> malloc().
>> Several questions:
>> 1) How to tell which thread owns the global_vm_lock? In gdb, printing
>> th->blocking_region_buffer for the main thread returns a pointer to
>> something, while another thread returns a zero value for
>> blocking_region_buffer. This suggests that the other thread owns the
>> global_vm_lock. On the other hand, if I dump the actual global_vm_lock,
>> the __data.__owner is 5488, the thread id for the main thread. I'm
>> thinking that this thread is trying to lock the GVL when it already has
>> it, but I'm not sure.
>> 2) in frame 8, the rb_str_buf_new should be requesting 129 bytes, yet
>> the size parameter in frame 7 is more than 160 Megabytes! This huge
>> allocation appears to be what triggers garbage collection with gvl. How
>> this happens is a complete mystery.
>> 3) within gdb, is it possible to figure out what the content of the
>> backtrace would be if it didn't hang? I know that ruby's backtrace stack
>> is somewhat complex - any pointers to simple-ish ways to find out where
>> the ruby interpreter is?
>=20
> Take a look at ruby's gdbinit:
>  http://rxr.whitequark.org/mri/source/.gdbinit
>=20
> For example, try rb_backtrace or rb_ps at gdb's prompt.
>=20
The ruby we're running doesn't seem to have debug.c compiled into it. The .g=
dbinit file fails with a message=20
No symbol "ruby_dummy_gdb_enums" in current context.
Do you know what compile flags cause debug.c to be included?
Thanks=20
Bill Paulson=20


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