[#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: Peter Zotov <whitequark@...>
Date: 2012-06-05 22:11:58 UTC
List: ruby-talk #396156
Bill Paulson писал 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):

1.9.1 is something of a danger sign for me: it never worked good enough 
for
production, at least for me.

>
> 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=0xfffffffc) at
> thread_pthread.c:36
> #5  0x081226a6 in rb_thread_call_with_gvl (func=0x8062b40 
> <gc_with_gvl>,
> data1=0x81954e0) at thread.c:984
> #6  0x0806282e in garbage_collect_with_gvl (objspace=0x81954e0) at
> gc.c:598
> #7  0x080628a6 in vm_xmalloc (objspace=0x81954e0, size=160796684) at
> gc.c:624
> #8  0x080de09e in rb_str_buf_new (capa=128) at string.c:722
> #9  0x080d29bb in rb_enc_vsprintf (enc=0x0, fmt=0x81552ac "%s:%d:in
> `%s'", ap=0xbf8f95e4 "X!?\t\"") at sprintf.c:1125
> #10 0x080d2a50 in rb_vsprintf (fmt=0x81552ac "%s:%d:in `%s'",
> ap=0xbf8f95e4 "X!?\t\"") at sprintf.c:1154
> #11 0x080d2a7b in rb_sprintf (format=0x81552ac "%s:%d:in `%s'") at
> sprintf.c:1164
> #12 0x0810ef01 in vm_backtrace_each (th=<value optimized out>,
> limit_cfp=0xb7fbea98, cfp=0xb7fbed98, file=0x9a42158
> "/local/pete/current/com.rb", line_no=34, ary=174937756) at vm.c:714
> #13 0x0810fd32 in rb_f_caller (argc=0, argv=0xb7f3f1f8) at vm.c:746
> #14 0x0810dea6 in call_cfunc (func=0x810fca0 <rb_f_caller>,
> recv=165378108, len=128, argc=-4, argv=0xb7f3f1f8) at
> vm_insnhelper.c:286
>
> 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?

Take a look at ruby's gdbinit:
   http://rxr.whitequark.org/mri/source/.gdbinit

For example, try rb_backtrace or rb_ps at gdb's prompt.

>
> Thanks,
> Bill Paulson

-- 
   WBR, Peter Zotov.

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