Bug #2637: unable to select for < 0.1s in windows

• Status: Closed
• Assignee: usa (Usaku NAKAMURA)
• Target version: -
• ruby -v: ruby 1.9.2dev (2010-01-24 trunk 26391) [i386-mingw32]

[rogerdpack (Roger Pack)]

=begin
in 1.9:

a = TCPSocket.new 'google.com', 80
Benchmark.realtime { IO.select([a], nil, nil, 0) }
=> 0.109375

in 1.8

a = TCPSocket.new 'google.com', 80
Benchmark.realtime { IO.select([a], nil, nil, 0) }
=> 0.0

This slow downs drb a lot, so is somewhat of a blocker.
Thanks.
-r
=end

[luislavena (Luis Lavena)]

=begin
Around other versions:

 C:\Users\Luis>pik ruby -rsocket -rbenchmark -e "a = TCPSocket.new('google.com', 80); puts Benchmark.realtime { IO.select([a], nil, nil, 0) }"
 IronRuby 0.9.3.0 on .NET 2.0.0.0
 
 0.0220012664794922
 
 jruby 1.4.0 (ruby 1.8.7 patchlevel 174) (2009-11-02 69fbfa3) (Java HotSpot(TM) Client VM 1.6.0_17) [x86-java]
 
 0.00999999046325684
 
 ruby 1.8.6 (2009-06-08 patchlevel 369) [i386-mswin32]
 
 0.029000997543335
 
 ruby 1.8.6 (2009-08-04 patchlevel 383) [i386-mingw32]
 
 0.0
 
 ruby 1.8.7 (2009-12-24 patchlevel 248) [i386-mingw32]
 
 0.0
 
 ruby 1.8.7 (2009-12-24 patchlevel 248) [i386-mswin32]
 
 0.0220010280609131
 
 ruby 1.9.1p376 (2009-12-07 revision 26041) [i386-mingw32]
 
 0.100004911422729
 
 ruby 1.9.1p376 (2009-12-07 revision 26041) [i386-mswin32]
 
 0.100005865097046
 
 ruby 1.9.2dev (2010-01-02 trunk 26229) [i386-mingw32]
 
 0.1000058650970459
 
 

=end

[usa (Usaku NAKAMURA)]

• Status changed from Open to Assigned
• Assignee set to usa (Usaku NAKAMURA)

=begin

=end

[wanabe (_ wanabe)]

=begin
do_select(), in thread.c, waits at least 100 ms on Windows.
(see the line over beginning of BLOCKING_REGION.)

But why?
=end

[usa (Usaku NAKAMURA)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

=begin
This issue was solved with changeset r26409.
Roger, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

=end