[Cerowrt-devel] Fwd: Will Edwards to give Mill talk in Estonia on 12/10/2014

Dave Taht dave.taht at gmail.com
Fri Dec 5 14:18:57 EST 2014

The mill computer is the coolest new cpu architecture I've ever heard
of, and if you are in estonia, you should go to this talk.

If not, the various presentations on each aspect of it, given at
places like stanford, google and elsewhere,
are all worthwhile.


Really key to the architecture (and why it's sort of relevant to the
bloat list), is that it can do 30+ ops/cycle, AND context
switch time is *4* cycles - where things like the haswell architecture
are in the 700-1200 range context switch times. Context
switch overhead is one of the reasons why a ton of programmers and
data centers running lots of VMs are going
crazy trying to find new ways to bulk up operations (improving
throughput, at the cost of latency). Getting rid of the
context switch cost (it's the same cost as a subroutine!) has
implications throughout every other layer of the system,
not just for vms in data centers, but high speed embedded processors
of all kinds.

I spent a couple weekends going through the presentations and wiki,
scribbling down some psuedocode for what
I thought would be "hard" cases to actually implement (like a java
stack machine), and in every case, the
arch was a win. Furthermore the presentations were so well constructed
that everytime I had an objection,
it was answered a slide or two later.

If "the belt" can be built, (and I don't see any reason why not, at
this point) wow, it's a game changer.

If I had money to invest, I would. I look forward to the ISA and
compilers being published soon.

---------- Forwarded message ----------
From: Mill Computing List Manager <listmanager at millcomputing.com>
Date: Fri, Dec 5, 2014 at 10:45 AM
Subject: Will Edwards to give Mill talk in Estonia on 12/10/2014
To: dave <dave.taht at gmail.com>

** Will Edwards from Mill Computing
will be giving a talk on a revolutionary computer architecture

View this email in your browser

Mill Computing

You have a 50-year-old IBM mainframe in your cell phone

Will Edwards from Mill Computing will be giving a talk on a
revolutionary computer architecture.

When: 14:00-15:00 with discussion afterwards, 10th December 2014
Where: ICT building room ICT-507AB, Tallinn Tech, Akadeemia tee 15a,
Tallinn, Estonia.

Every architectural part of current CPUs was present in the System/360
Model 91 in 1967 – caches, out-of-order execution, large register
files, byte addressing, even hexadecimal. All the advances of the last
50 years have been in the fabrication process – how CPUs get made, not
how they work. Isn’t it about time to bring the architecture up to
date too?

This talk introduces the new Mill CPU architecture which brings
DSP-like efficiency and performance to general purpose computing.
Offering a 10x power/performance gain over conventional out-of-order
superscalar architectures, the Mill family of CPUs scales from phones
to supercomputers.

The Mill is an extremely wide-issue VLIW design, able to issue 30+
MIMD operations per cycle.  The Mill is inherently a vector machine
and can vectorize and pipeline almost all loops in general purpose
code. The Mill is a belt machine (as distinct from a stack or register
machine) and has a fine grained security model that facilitates
microkernels without performance penalties.

This talk will give a high-level introduction to the Mill programming
model, with an opportunity for the audience to ask more detailed
questions in areas of interest.

Will is a technical member of the Mill CPU team.

Videos and other material about other aspects of the Mill can be found
at http://millcomputing.com/docs.

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Dave Täht


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