Breaking News
Comments
pica0
User Rank
Rookie
re: Samsung reveals eight-core mobile processor
pica0   1/10/2013 3:47:28 PM
NO RATINGS
Looking at http://www.phoronix.com/scan.php?page=article&item=samsung_exynos5_dual&num=1 a 4 core A15 SoC provides sufficient compute power even for more than 80% of all commercial desktop needs. Future will be interesting ...

rick merritt
User Rank
Blogger
re: Samsung reveals eight-core mobile processor
rick merritt   1/10/2013 5:37:52 PM
NO RATINGS
I nominate the Exynos 5 Octal for best silicon slideware of CES 2013 ;-)

rick merritt
User Rank
Blogger
re: Samsung reveals eight-core mobile processor
rick merritt   1/10/2013 5:38:43 PM
NO RATINGS
...and wonder if mobile apps can really take advantage of eight cores in any configuration.

ChipConnoisseur
User Rank
Rookie
re: Samsung reveals eight-core mobile processor
ChipConnoisseur   1/10/2013 6:18:34 PM
NO RATINGS
Apps won't have access to more than 4 cores at a time.

Jay_EE
User Rank
Rookie
re: Samsung reveals eight-core mobile processor
Jay_EE   1/10/2013 11:38:31 PM
NO RATINGS
http://www.eetimes.com/electronics-news/4398094/Big-LITTLE-software-is-not-so-hard?pageNumber=1 If OS supports the multi processing mode of big.LITTLE technology, then yes, APP can access all eight cores.

yalanand
User Rank
Rookie
re: Samsung reveals eight-core mobile processor
yalanand   1/13/2013 5:48:05 AM
NO RATINGS
@ChipConnoisseur, where is this limiation coming from ? How can you make Apps compatible to 8 core ?

jaybus0
User Rank
CEO
re: Samsung reveals eight-core mobile processor
jaybus0   1/15/2013 11:42:22 AM
NO RATINGS
I would imagine the OS would use a dynamic, weighted scheduler, where A15 cores would be assigned preferentially to A7 cores, but only when the A15 cores were available.

bsnguy
User Rank
Rookie
re: Samsung reveals eight-core mobile processor
bsnguy   1/11/2013 6:56:24 PM
NO RATINGS
You bet they can! Think real-time image/data processing and data collection tasks. I have applications that consume all of my dual-core processing right now and could use more. The issue, now, is power consumption (how long can I run on all four cores going at full speed) and memory bandwidth (can my portable device's memory feed all those processors fast enough to keep them running at full speed).

Peter Clarke
User Rank
Blogger
re: Samsung reveals eight-core mobile processor
Peter Clarke   1/15/2013 2:54:54 PM
NO RATINGS
@jaybus My understanding is that in standard big-little operation the operating system sees just four cores. As load increases applications move up through the dynamic voltae and clock frequency scaling (DVFS) on the A7 until it is close to maximum then they are moved on to the low-end of the DVFS for for the companion A15 where the scaling continues to maximum voltage and clock frequency. As the processing load reduces the reverse happens. There is not much latency in switching from A7 to A15 but it is still important to avoid a hysteresis effect where the software repearedly bounces from A7 to A15 and back.

luting
User Rank
CEO
re: Samsung reveals eight-core mobile processor
luting   1/10/2013 6:23:35 PM
NO RATINGS
This is Quad Core SoC, not Eight Core. In Peak performance mode, it will be only Quad A15 running. A7 only kicks in at low power mode to replace shutting down A15. Nvidia Tegra 4 claims to be Quad Core SoC but I am sure there is similar Big-Little arrangement to have 4 Low Power Cores behind.

eewiz
User Rank
CEO
re: Samsung reveals eight-core mobile processor
eewiz   1/11/2013 6:27:42 AM
NO RATINGS
Turns out that Tegra 4 is actually a 5 core chip with 4 "big" cores and a single "little" core.

ChipConnoisseur
User Rank
Rookie
re: Samsung reveals eight-core mobile processor
ChipConnoisseur   1/11/2013 12:07:45 PM
NO RATINGS
No, he's right. There are 5 cores, but it's only a "quad core" chip, with a companion core being activated for low-end tasks (while deactivating the other 4). So it's very similar to Samsung's Exynos 5 Octa, although I have serious doubts that the low-clocked A15 is more energy efficient than a quad core A7.

help.fulguy
User Rank
Manager
re: Samsung reveals eight-core mobile processor
help.fulguy   1/10/2013 10:09:34 PM
NO RATINGS
Just a hogwash. Its Quad core at a time. Rest is just marketing

Jay_EE
User Rank
Rookie
re: Samsung reveals eight-core mobile processor
Jay_EE   1/10/2013 11:32:33 PM
NO RATINGS
big.LITTLE supports three operation modes. Cluster migration, CPU migration, and multi processing mode. In multi processing mode, all four A7 cores and four A15 cores are on at any time. SAMSUNG's new exynos chip also supports all of those three modes. Check out the ARM website.

ChipConnoisseur
User Rank
Rookie
re: Samsung reveals eight-core mobile processor
ChipConnoisseur   1/11/2013 12:09:31 PM
NO RATINGS
You're right, but I doubt all cores will be used except for very specific applications meant to take advantage of it - like any app that could take advantage of heterogeneous computing. The rest 99.9% of them will only use 4 cores at most.

Batman0
User Rank
Rookie
re: Samsung reveals eight-core mobile processor
Batman0   1/11/2013 3:51:31 PM
NO RATINGS
Well, that has to be the main application target, isnt't it? If Samsung wanted to have just more power, they would have not bothered with the big-little implementation. They would have used eight full-speed, full-power cores, all active at the same time and with the usual clock scaling. This seems to be a sensible compromise, two distinct, selectable computational levels, each optimized for different operational conditions, plus the option to combine both to have higher processing power when really needed.

luting
User Rank
CEO
re: Samsung reveals eight-core mobile processor
luting   1/11/2013 5:03:22 PM
NO RATINGS
Thanks for information for Nvidia Core. I am surprised that my comments cause so much discussion. I will agree that nothing prevent all 8 cores running at the same time although it is not likely choice. A7 performance per MHz is only half of A15 and is running at 60% of clock frequency. Therefore, each A7 core will only deliver 1/3 A15 performance. So it doesn't make lots of sense to allow A7 join A15 cluster in most cases. Therefore, its performance is only equivalent to 5.3 A15 Core performance. So we should call Samsung 5.3 Core in the future. :-)

tpfj
User Rank
CEO
re: Samsung reveals eight-core mobile processor
tpfj   1/11/2013 8:01:48 PM
NO RATINGS
Didn't you already publish that Mediatek has this in the works? http://www.eetimes.com/electronics-news/4402070/MediaTek-reportedly-has-eight-core-apps-processor

Peter Clarke
User Rank
Blogger
re: Samsung reveals eight-core mobile processor
Peter Clarke   1/16/2013 12:23:35 PM
NO RATINGS
Yes, but as yet no show. Perhaps at MWC?

coolio0
User Rank
Freelancer
re: Samsung reveals eight-core mobile processor
coolio0   1/14/2013 3:53:51 PM
NO RATINGS
http://www.anandtech.com/show/6654/samsungs-exynos-5-octa-powered-by-powervr-sgx-544mp3-not-arms-mali



Flash Poll
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Rishabh N. Mahajani, High School Senior and Future Engineer

Future Engineers: Don’t 'Trip Up' on Your College Road Trip
Rishabh N. Mahajani, High School Senior and Future Engineer
1 Comment
A future engineer shares his impressions of a recent tour of top schools and offers advice on making the most of the time-honored tradition of the college road trip.

Max Maxfield

Juggling a Cornucopia of Projects
Max Maxfield
7 comments
I feel like I'm juggling a lot of hobby projects at the moment. The problem is that I can't juggle. Actually, that's not strictly true -- I can juggle ten fine china dinner plates, but ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
37 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Karen Field

July Cartoon Caption Contest: Let's Talk Some Trash
Karen Field
131 comments
Steve Jobs allegedly got his start by dumpster diving with the Computer Club at Homestead High in the early 1970s.

Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)