Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
TanjB
User Rank
Rookie
re: Video: mobile chips are like pizza
TanjB   8/6/2012 5:37:30 PM
NO RATINGS
I disagree. Look up Amdahl's law, it shows how the serial parts of the algorithm can become a large block. The stuff we know how to make parallel, like graphics, is embarrassingly parallel and the HW does that well. But just sticking 4 CPUs on a die is not "mission accomplished". A real world algorithm has to balance using multiple CPUs against competition for DRAM and cache (both of which are easily maxed out on mobile chips)and the additional complexity of synchronization. It often is the case that the small net gain is simply not worth the complexity and cost of development. On PCs the large wins, for consumer scenarios, have been running completely different tasks on the different cores. The chips have monstrous DRAM bandwidth and big caches, along with multi-watt budgets, that make that practical. In the mobile space that does not work nearly as well. So for the HW engineer who figures 4 cores on a chip is job done, no, the work has barely started on figuring out how to make mobile chips that really perform on battery power. You will see those 4 cores, and the GPU, coordinate in a few specific high-value scenarios worth the very expensive software engineering to fit useful gains within the chip limits, but we are nowhere near done with figuring out the HW.

SylvieBarak
User Rank
Rookie
re: Video: mobile chips are like pizza
SylvieBarak   8/6/2012 12:44:42 AM
NO RATINGS
Right. The hardware is there, the software is not quite at that level yet.

Luis Sanchez
User Rank
Rookie
re: Video: mobile chips are like pizza
Luis Sanchez   8/5/2012 9:41:03 PM
NO RATINGS
Nice video. Your final question made me think of actually what is happening in having multi-core processors today. Parallel programming is an on-going research topic. Having 2 or 4 or more cores on one single package does make it twice or quad times more powerful however, the software requires a great deal of effort to be designed in order to seize all that parallel execution capacity. So far, looks like software development is behind hardware in this regards, right?

Bert22306
User Rank
CEO
re: Video: mobile chips are like pizza
Bert22306   8/3/2012 8:34:48 PM
NO RATINGS
Excellent! I'm also a thin crust kind of guy, and fairly minimalist with the toppings. Tomato, cheese, and basil are always good, and some olive oil helps too. The crust needs to be crisp. The edges of the crust need to be a little browned, some might even call it burned. None of that soft chewy stuff. One problem with the constant downsizing is the same problem that occurs with space-based hardware. You get to the point that turning a transistor on and off becomes a stochastic event. In space, this is caused by radiation impinging on the transistors. With miniaturization, voltages have to be so low, to prevent arcing, and the traces are down to the atomic level, so it becomes more and more difficult to even know what it means to have current flow. Is it just leakage through the insulator? About image processing. You mentioned separating out the moving objects in an image from the static objects or background, to save on transmission bandwidth. This is the basic technique used in all of the MPEG compression variants. On the one hand, reduced transmission bandwidth has to save power. But on the other hand, when you increase the efficiency of the compression algorithm, you also increase the processing power needed in both encoding and decoding. A two-edged sword, one would think.

junko.yoshida
User Rank
Blogger
re: Video: mobile chips are like pizza
junko.yoshida   8/3/2012 8:17:40 PM
NO RATINGS
Thanks for posting, Sylvie. But I want to make sure that Weili Dai, Marvell's co-founder, gets credit for using the "pizza" analogy for a while. More on her thinking is explained in EE Tmes' one-on-one interview with Dai earlier this year: http://confidential.eetimes.com/news-updates/4235571/Marvell-s-Weili-Dai-bets-on-Kinoma-for-TV--mobile-strategies



Top Comments of the Week
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
<b><a href=Betajet">

The Circle – The Future's Imperfect in the Present Tense
Betajet
5 comments
The Circle, a satirical, dystopian novel published in 2013 by San Francisco-based writer Dave Eggers, is about a large, very powerful technology company that combines aspects of Google, ...

Max Maxfield

Recommended Reads From the Engineer's Bookshelf
Max Maxfield
27 comments
I'm not sure if I read more than most folks or not, but I do I know that I spend quite a lot of time reading. I hate to be idle, so I always have a book or two somewhere about my person -- ...

Martin Rowe

Make This Engineering Museum a Reality
Martin Rowe
Post a comment
Vincent Valentine is a man on a mission. He wants to make the first house to ever have a telephone into a telephone museum. Without help, it may not happen.

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
16 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...