rubyconf 2007 - Rubinius 1.0

Last things ﬁrst,
ﬁrst things last.
What is the endgame?

In a word..

Evan Phoenix - RubyConf 2007

Total


Total world


Total world domination


For Ruby!

375 days ago...
In a galaxy far far away...
(aka Denver)


The end of Sydney

The beginning of Rubinius


Enormous progress


class Rubinius < Smalltalk
# form
include Ruby::Syntax
# function
include Ruby::Behavior
# elbow grease
include Google.search(“crazy cs papers”)
end


CS Nerd Attack Mode!
(blitznerdo)


Generational
Garbage Collection!
(with heap compaction)


Bytecode execution!


Stackless!
(uses no C stack)


Self-hosted
kernel and compiler!


Pre-compiled ﬁles!
(.rbc)


Builtin packaging!
(.rba == .jar)


Oh my!


Audience
Participation


Runtime and Kernel


kernel
noun
a softer, usually edible part of a nut, seed, or fruit stone contained
within its hard shell.
• the seed and hard husk of a cereal, esp. wheat.
• [in sing. ] the central or most important part of
something : this is the kernel of the argument.
• the most basic level or core of an operating system of a
computer, responsible for resource allocation, ﬁle management,
and security.
• [as adj. ] Linguistics denoting a basic unmarked linguistic string.


1.8


84,516 lines of C
0 lines of Ruby


1.9


128,786 lines of C
0 lines of Ruby


IronRuby
(pre-alpha1)


48,282 lines of .cs
0 lines of Ruby


JRuby 1.0.2


114,507 lines of .java
0 lines of Ruby


Rubinius


25,398 lines of C
13,946 lines of Ruby


NOT Ruby Ruby

150,000

125,000

100,000

75,000

50,000

25,000

0
1.8 1.9 ironruby jruby rubinius


Junior High
Analysis


1.8 and 1.9

Ruby for C programmers


JRuby

Ruby for Java programmers


IronRuby

Ruby for C# programmers


Rubinius

Ruby for Ruby programmers


Eating your own dog food
==
Feedback loop


Optimized Rubinius
kernel / VM
==
Optimization for all
Ruby code

You’re a Ruby developer,
I’m a Ruby developer


Of the rubists,
by the rubists,
for the rubists


Road, rubber,
all that jazz.


Faster in 24 of 31 tests
(yarv micro benchmarks against 1.8)


Moving quickly


so why isn’t it done?


Architecture/design is
quite important


but hard to create in a
vacuum


Mistakes were made.


“Practice makes perfect”
-- Ryan Davis (RubyConf 2007)


“A person who never made a
mistake never tried anything new”
-- Albert Einstein

“You will do foolish things,
but do this with enthusiasm”
-- Collete


-Ofun


Rarely a burden,
always a treat.


Community


57 committers
17 with 20 or more commits

36 with 100+ lines changed


Weekend patchers
&
Code junkies alike


Free ﬂowing commit bit


Marcus Crafter

Pat Eyler

David Waite
Shane Becker Evan Phoenix - RubyConf 2007

Eric Hodel
Adam Gardiner

Brian Ford
Kevin Clark

Wilson Bilkovich
Ryan Davis

Yehuda Katz Evan Phoenix - RubyConf 2007

Abigail Phoenix
John Hornbeck (ofﬁcial wife)

Fog
(ofﬁcial mascot)

Eero Saynatkari Evan Phoenix - RubyConf 2007

Thanks EY!


Evan Phoenix
<evan@fallingsnow.net>


Backtraces!

An exception has occurred:
User requested termination with Control-C (Interrupt)

Backtrace:
Readline.readline at kernel/core/readline.rb:52
main.__script__ at lib/bin/sirb.rb:78
main.load at kernel/core/compile.rb:78
main.require at kernel/core/compile.rb:129
Array#each at kernel/core/array.rb:526
Integer(Fixnum)#times at kernel/core/integer.rb:19
Integer(Fixnum)#times at kernel/core/integer.rb:19
main.__script__ at kernel/loader.rb:159


C extensions can
misbehave


VALUE test_segfault(VALUE self) {
// Get a pointer to address 4.
char *i = (char*)4;
// Attempt to read from address 4
// which is definitely not allowed.
x = *i;
// Never get this far.
return Qnil;
}

Raises an exception!
Segfault detected in function 0x90a00 (accessing 0x4) (MemorySegmentionError)

SomeExtension#test_segfault at extensions/test/test.c
main.__script__ at extensions/test/test.rb:38
main.load at kernel/core/compile.rb:95
main.__script__ at kernel/loader.rb:122


Time lost to segfaults

1.8 rubinius
200
200

150

100
70

50 30

10
6
2

1 3 5


Memory usage


• 1.8 garbage collector is
simple, but too simple.

• Rubinius uses modern
techniques to decrease
memory usage and increase
throughput


Fork you!


In 1.8...

• Start up a program.
• Require all your code.
• fork() the process.
• Watch your memory double.


In Rubinius...

• Start up a program.
• Require all your code.
• fork() the process.
• Watch (virtually) NO change in the memory
footprint!


Memory change per
additional instance

1 2 3 4

1.8 rubinius


Thank You!


rubyconf 2007 - Rubinius 1.0

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