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Observations from Uppsala Computer Simulation, Virtual Platforms, Embedded Programming, Multicore and More (by Jakob Engblom)

Tag Archives: Homogeneous

SiCS Multicore Day 2012

2012 September 16 22:12 / 4 Comments / Jakob

The 2012 edition of the SiCS Multicore Day was fun, like they have always been in the past. I missed it in 2010 and 2011, but could make it back this year. It was interesting to see that the points where keynote speakers disagreed was similar to previous years, albeit with some new twists. There was also a trend in architecture, moving crypto operations into the core processor ISA, that indicates another angle on the hardware accelerator space.

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Posted in: computer architecture, conferences, embedded software, multicore computer architecture, multicore debug, multicore software, parallel computing, programming / Tagged: Erik Hagersten, heterogeneous, homogeneous, James Larus, Rich Hetherington, SiCS Multicore days, Stephen Hill

MCC 2009 Presentations Online

2009 December 3 09:29 / 2 Comments / Jakob

UPMARC_700x150The presentations from the 2009 Swedish Workshop on Multicore Computing (MCC 2009) are now online at the program page for the workshop. Let me add some comments on the workshop per se.

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Posted in: appearances, computer architecture, conferences, embedded software, multicore debug, multicore software / Tagged: Andras Vajda, Domain-specific languages, Ericsson, heterogeneous, homogeneous, keynote, LTE, MCC, UpMarc

Freescale P4080, in Physical Form

2009 September 17 11:16 / Leave a Comment / Jakob

freescale-logo-iconPast Tuesday, I attended the Freescale Design With Freescale (DWF) one-day technology event in Kista, Stockholm. This is a small-scale version of the big Freescale Technology Forum, and featured four tracks of talks running from the morning into the afternoon. All very technical, aimed at designing engineers.

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Posted in: appearances, embedded software, embedded systeme, multicore computer architecture, multicore debug, virtual platforms / Tagged: DWF, freescale, heterogeneous, homogeneous, Jonas Svennebring, MPC5606, p4080, Simics

SiCS Multicore Day 2009

2009 September 7 20:26 / 8 Comments / Jakob

Last Friday, I attended this year’s edition of the SiCS Multicore Day. It was smaller in scale than last year, being only a single day rather than two days. The program was very high quality nevertheless, with keynote talks from Hazim Shafi of Microsoft, Richard Kaufmann of HP, and Anders Landin of Sun. Additionally, there was a mid-day three-track session with research and industry talks from the Swedish multicore community. Read More →

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Posted in: appearances, conferences, multicore computer architecture, multicore debug, multicore software, virtual machines / Tagged: Anders Landin, CPP, Ericsson, Erlang, Hazim Shafi, heterogeneous, homogeneous, MCC, Richard Kaufmann, SiCS Multicore days, Simics, Visual Studio 2010

SiCS Multicore Days: The Debate Points

2008 September 19 22:14 / 7 Comments / Jakob

It is a week ago now, and sometimes it is good to let impressions sink in and get processed a bit before writing about an event like the SiCS Multicore Days. Overall, the event was serious fun, and I found the speakers very insightful and the panel discussion and audience questions added even more information.

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Posted in: conferences, multicore computer architecture, multicore software, security / Tagged: conference, heterogeneous, homogeneous, memory bandwidth, multicore, panel discussion, SiCS Multicore days, software tools

David Ditzel Interview at The Register/Semicoherent Computing

2008 May 9 18:10 / Leave a Comment / Jakob

TheRegister Radio LogoThe Register has a few podcasts in addition to their website, and the one called “Semicoherent Computing” has turned into a very nice series of interviews with interesting people from the computer industry. I recently listened to their interview from September 2007 with David Ditzel of Transmeta fame. He had a lot to say about the history of computing, as well as interesting things on where computing is going. Well worth a listen! Particular interesting highlights…

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Posted in: computer architecture, multicore computer architecture, virtual machines / Tagged: heterogeneous, homogeneous, IBM, Intel, Niagara, power architecture, Rock, Sun, Transmeta

Heterogeneous vs homogeneous systems, revisited

2008 March 27 22:13 / 3 Comments / Jakob

I got another email from my friend with the thesis that processors will become ever more homogeneous as time goes on, while I believe in a relative heterogenezation (is that a word?) of computer architecture with many special-purpose accelerators and helper processors. This argument is put forward in a previous blog post. In this round, the arguments for homogenization are from the gaming world.

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Posted in: computer architecture, multicore computer architecture, multicore software, programming / Tagged: CUDA, GPU, heterogeneous, homogeneous, Larrabee, Nvidia, PC architecture, PhysX

Homogeneous and Heterogeneous Multicore vs Programmers

2007 November 3 21:21 / 6 Comments / Jakob

An old colleague just sent me an email bringing up a discussion we had last year, where he was a strong proponent for the homogeneous model of a multiprocessor. The root of that discussion was the difference between the Xbox 360 and Playstation 3 processors. The Xbox 360 has a three-core, two-threads-per-core homogeneous PowerPC main processor called the Xenon (plus a graphics processor, obviously), while the PS3 has a Cell processor with a single two-threaded PowerPC core and seven SPEs, Synergistic Processing Elements (basically DSP-like SIMD machines).

In the game business, it is clear that the Xenon CPU is considered easier to code for. This means that even though the Cell processor clearly has higher theoretical raw performance, in practical the two machines are about equal in power since it is harder to make use of the Cell. Which seems to be a fact.

So here, homogeneous systems do appear to have it easier among programmers. However, I do not believe that that extends to all systems, all the time, everywhere.

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Posted in: embedded software, embedded systeme, multicore computer architecture, multicore software, programming / Tagged: accelerators, Cell, DSP, heterogeneous, homogeneous, Xenon

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