Feeds

AMD Bulldozer core to weave multiple threads

But not the way Intel's HyperThreading does so

Build a business case: developing custom apps

AMD's 'Bulldozer' core design will incorporate some kind of simultaneous multithreading (SMT) technology, it has emerged. But it's not going to be like Intel's HyperThreading the smaller chip maker has insisted.

This week, AMD showed off its 'Magny Cours' chip architecture, a design that crams in six of the cores found on its 'Istanbul' chips, each with 512KB of their own L2 cache and 6MB of shared L3 cache.

An architecture roadmap revealed at the Hot Chips conference shows the 45nm processor - out next year in its initial form - will soon evolve into a 12-core beast with 12MB of L3. It'll gain a four-channel 1333MHz DDR 3 controller along the way - Istanbul has a two-channel controller the peaks at 1066MHz DDR 2.

It's not clear whether the 12-core Magny Cours will use the Bulldozer core from the word go, or get it in a subsequent revision.

Either way, Bulldozer itself will deliver the ability to handle multiple threads simultaneously, EE Times reports after a chat with Pat Conway, principal member of technical staff at AMD.

He didn't say much more - and AMD has subsequently stated for the record that it has made no formal announcement on adding SMT to Bulldozer - though he did indicate AMD's approach will operate "in a different fashion than HyperThreading".

HT allows a second thread access to core resources that have not been called upon by the first thread. That's not always possible, which is why HT delivers a performance boost generally well below that of adding a further physical core: improvements of 15-30 per cent and up to 80 per cent, respectively.

Intel's approach isn't the only one, and SMT is implemented in a number of different ways in MIPS, IBM Power and Sun Sparc processors. ®

Build a business case: developing custom apps

More from The Register

next story
Kate Bush: Don't make me HAVE CONTACT with your iPHONE
Can't face sea of wobbling fondle implements. What happened to lighters, eh?
The agony and ecstasy of SteamOS: WHERE ARE MY GAMES?
And yes it does need a fat HDD (or SSD, it's cool with either)
Apple takes blade to 13-inch MacBook Pro with Retina display
Shaves price, not screen on mid-2014 model
Steve Jobs had BETTER BALLS than Atari, says Apple mouse designer
Xerox? Pff, not even in the same league as His Jobsiness
TV transport tech, part 1: From server to sofa at the touch of a button
You won't believe how much goes into today's telly tech
Apple analyst: fruity firm set to shift 75 million iPhones
We'll have some of whatever he's having please
Apple to build WORLD'S BIGGEST iStore in Dubai
It's not the size of your shiny-shiny...
XBOX One will learn to play media from USB and DLNA sources
Hang on? Aren't those file formats you hardly ever see outside torrents?
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 10 endpoint backup mistakes
Avoid the ten endpoint backup mistakes to ensure that your critical corporate data is protected and end user productivity is improved.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Rethinking backup and recovery in the modern data center
Combining intelligence, operational analytics, and automation to enable efficient, data-driven IT organizations using the HP ABR approach.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.