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| Rocky Votolato - "White Daisy Passing" |
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acoustic folk indie rock music video BlankTV
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Tags : music rocky votolato white daisy passing |
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Affichage : 58071
Durée : 191 s |
| Kilim: Fast, lightweight, cheap message passing in Java. |
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Google Tech Talks
June, 11 2008
ABSTRACT
Kilim: Fast, lightweight, cheap message
passing in Java.
A million actors, 3x faster than Erlang.
The message passing (MP) paradigm is often
seen as a superior alternative to the typical
mix of idioms in concurrent (shared-memory,
locks) and distributed programming
(CORBA/RMI). MP eliminates worries endemic to
the shared-memory mindset: lock ordering,
failure-coupling, low-level data races and
memory models. It simplifies synchronization
between data and control planes (no lost
signals or updates), and unifies APIs for
local and remote process interaction.
Curiously however, there are no efficient
frameworks for intra-process message-passing,
except for Erlang. This talk describes a Java
framework called "Kilim" to fix this state of
affairs. Kilim provides:
1. Extremely lightweight user-level threads
(actors) with automatic stack management,
obtained via CPS transformation.
2. A simple type system that ensures actor
isolation by controlling pointer aliasing in
messages at compile time, and by ensuring
linear ownership of mutable message objects.
This permits safe, zero-copy communication.
3. A compact run-time library containing
typed mailboxes (with optional flow control),
user-definable scheduling and python style
generators.
Kilim is portable; one of our explicit goals
was to not require changes to the Java
language syntax or to the JVM.
Kilim scales comfortably to handle hundreds
of thousands of actors and messages on modest
hardware. It is fast as well --
task-switching is 1000x faster than Java
threads and 60x faster than other lightweight
tasking frameworks, and message-passing is 3x
faster than Erlang (currently the gold
standard for concurrency-oriented
programming).
Speaker: Sriram Srinivasan
Sriram Srinivasan has 19 years of experience
delivering a variety of systems spanning
wireless sensors, messaging systems,
middleware (he was a principal engineer of
the Weblogic Application server) and
large-scale applications such as cargo
planning systems and network management
systems.
He is currently on leave from industry,
pursuing a PhD at the University of
Cambridge. He is interested in mixing
programming languages, concurrenct &
distributed systems and modal logics.
Tags : google techtalks techtalk engedu talk talks googletechtalks education |
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Affichage : 8182
Durée : 2711 s |
| ♫ Soundtrack - Lord of the Rings - The Passing of the Elves |
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with lyric (and background animation ;-)
ost by howard shore
------------------------
lyric and information from:
www.geocities.com/magpie930/
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"passing of the elves" of the Complete
Recordings - The Fellowship of the Ring; with
lyric in Sindarin (an Elven language)
The song is of a scene of the special
extended edition and doesn't appear in the
cinema-version of lord of the rings.
(Frodo and Sam are watching wood-elves who
are leaving middle-earth, while they singing
this song)
watch it here:
http://de.youtube.com/watch?v=Kzx2KQ7VM5E
The song contains parts of a poem, written by
Tolkien.
English translation:
Snow White! Snow White! O Lady clear!
O Queen beyond the Western Seas! O Light to
us that wander there Amid the world of woven
trees! Gilthoniel! O Elbereth! Clear are thy
eyes and bright is breath, Snow-white!
Snow-white! We sing to thee In a far land
beyond the Sea! O Stars that in the Sunless
Year With shining hand by thee were sown, In
windy fields now bright and clear We see your
silver blossom blown! O Elbereth Gilthoniel!
We still remember, we who dwell In this far
land beneath the trees, Thy starlight on the
Western Seas.
Tags : passing of the elves Complete Recordings cr lotr fotr |
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Affichage : 164184
Durée : 165 s |
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