Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
Page 1 / 2   >   >>
ChipMaster0
User Rank
Rookie
re: London Calling: Are ARM's big-little days numbered?
ChipMaster0   4/20/2013 7:10:39 PM
NO RATINGS
What's next for big.Little is that it just got 20 licensees, and Renesas will even take it into the car chip market, which should be another booming chip market, soon: http://techdomino.com/renesas-big-little-r-car-h2

Pat2010
User Rank
Rookie
re: London Calling: Are ARM's big-little days numbered?
Pat2010   1/24/2013 8:59:06 PM
NO RATINGS
Mhhh, more interesting techniques exit like body biasing. Check the literature on conferences I would say. Though such techniques are not always possible for everyone at a foundry - advantageous for firms with own process and modelling departments.

Peter Clarke
User Rank
Blogger
re: London Calling: Are ARM's big-little days numbered?
Peter Clarke   1/24/2013 12:15:50 PM
NO RATINGS
I'll also throw this into the mix. At highest voltage there also tends to be an increase in non-dynamic (leakage) power consumption. BUT leakage consumption is a bigger proportion of overall IC power consumption when a chip is idling at low voltage.

Peter Clarke
User Rank
Blogger
re: London Calling: Are ARM's big-little days numbered?
Peter Clarke   1/24/2013 12:13:47 PM
NO RATINGS
You seem to be treating DF and DV as if they are fully independent. But you can only achieve full DF scaling at top voltage. And at reduced voltage you cannot do much DF scaling.

help.fulguy
User Rank
Manager
re: London Calling: Are ARM's big-little days numbered?
help.fulguy   1/23/2013 5:25:30 PM
NO RATINGS
ARM has no choice. When your Dual core A15 power (just for core) comes at 6W, how do you compete against Intel Atom, when they can match performance and have lower power? ARM is losing the power battle. ARM is no longer power performance efficient. Intel took the lead

mvox100
User Rank
Rookie
re: London Calling: Are ARM's big-little days numbered?
mvox100   1/23/2013 5:06:21 PM
NO RATINGS
Unfortunately, from the perspective of energy consumption, DF really doesn't help, even though it does lower the power (energy consumption per second). In fact, slowing down the frequency will only increase the total energy consumed for the same task as it increases the execution time (due to the extra energy consumed in the "supporting" blocks to keep the core running).

GLink
User Rank
Rookie
re: London Calling: Are ARM's big-little days numbered?
GLink   1/23/2013 4:51:48 PM
NO RATINGS
I would hesitate to claim that it's just DVFS. DFS works primarily on dynamic power, and does little for overall energy consumption, while DVS is where the real meat is, affecting both leakage and dynamic consumption strongly. At the same time, as voltage drops, frequency must also often be compensated to assure proper operation. Big.Little is different in that by having two entire cores, you can also use separate fabrication parameters for both. Because the two cores are independent entirely, it's possible for the .Little processor to be fabricated with a high threshold voltage in mind for low leakage during the expected long on-times. The Big. processor can then be fabricated with a more aggressive process and less concern about leakage. Rather than designing for average case, you can design for expected case for both processors.

sranje
User Rank
Manager
re: London Calling: Are ARM's big-little days numbered?
sranje   1/22/2013 8:27:45 PM
NO RATINGS
How about use of Digital power mngmt (Intel's term is IVR - for integrated voltage regulator - to be used in multicore Hasswell processor family) and fine tune each core.... How many PMU/PMICs is Samsung's Exynos Octa 5 using?

Hasmon
User Rank
Rookie
re: London Calling: Are ARM's big-little days numbered?
Hasmon   1/22/2013 6:22:43 PM
NO RATINGS
Oh come on...there ought to be a system-wide solution to this problem. Some types of code (simple logic, event handling etc.) can probably run on the baby processor. Some larger code (iterating through large data structures, block data handling, signal processing etc.) can be done on the larger core. These are 2 different types of programming...one needs to optimize latency while the other might need to optimize throughput...but due to the prevailing convention we use a single programming language and a single processor for both types of data. If arm wants to tackle this they should invent a new type of programming language or virtual machine or something, and assign threads to different processors. Then let the VM or OS decide which core to turn on, based on software demand.

bgees
User Rank
Rookie
re: London Calling: Are ARM's big-little days numbered?
bgees   1/22/2013 6:38:34 AM
NO RATINGS
Bunch of Bollocks! Peter gotta get his facts straights and realize it was not ARM who invented Big Little! It was really an ARM customer that started it, then ARM took the concept, enhanced and started gorilla marketing campaign.

Page 1 / 2   >   >>


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
3 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
11 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

No 2014 Punkin Chunkin, What Will You Do?
Martin Rowe
2 comments
American Thanksgiving is next week, and while some people watch (American) football all day, the real competition on TV has become Punkin Chunkin. But there will be no Punkin Chunkin on TV ...

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 ...