Article: Parallelism at HotPar 2010
By: Richard Cownie (tich.delete@this.pobox.com), August 5, 2010 8:56 am
Room: Moderated Discussions
Rohit (@.) on 8/5/10 wrote:
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>Can you point me to some thing that describes architecture of these Cray vector
>machines in moderate detail? Is LRB a Cray-vector-on-steroids?I have heard a lot
>about them but never known what they were.
This seems like a good place to start:
http://www.craywiki.com/index.php?title=Main_Page
I don't know many of the details, though I worked with
a later vector processor. The rough idea seemed to be
to combine a very fast scalar cpu, together with a
bunch of vector registers, and vector instructions
operating on those instructions, with very low overhead
for the vector operations (so that you could go fast even
with short vectors) and with "chaining", i.e. several
dependent vector instructions could run as a pipeline.
Neat stuff for the time, looks quaint now when you can
buy 1TFLOPS for $250 or so ...
Anyway, it's not much like LRB.
---------------------------
>Can you point me to some thing that describes architecture of these Cray vector
>machines in moderate detail? Is LRB a Cray-vector-on-steroids?I have heard a lot
>about them but never known what they were.
This seems like a good place to start:
http://www.craywiki.com/index.php?title=Main_Page
I don't know many of the details, though I worked with
a later vector processor. The rough idea seemed to be
to combine a very fast scalar cpu, together with a
bunch of vector registers, and vector instructions
operating on those instructions, with very low overhead
for the vector operations (so that you could go fast even
with short vectors) and with "chaining", i.e. several
dependent vector instructions could run as a pipeline.
Neat stuff for the time, looks quaint now when you can
buy 1TFLOPS for $250 or so ...
Anyway, it's not much like LRB.