Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 2 / 3   >   >>
Wilco1
User Rank
CEO
Re: Intel, ARM Do Server Wrestling at ISSCC
Wilco1   11/6/2013 8:24:25 AM
NO RATINGS
What A7 are you talking about? And what does transistor physiscs or ALU layout have got to do with this?

If you didn't understood it, in simple terms: a limited 2-way out-of-order CPU is never going to beat a 4-way fully OoO one. Better transistor physics does not help there.

HangLai
User Rank
Rookie
Re: Intel, ARM Do Server Wrestling at ISSCC
HangLai   11/6/2013 8:10:20 AM
NO RATINGS
Wilco1:  Please show your evidence that shows A7 performed better than Intel's, either through the transistor physics or the architecture ALU layout in the chip.  Please don't put out any alleged information that is non-scientific and no basis.

Wilco1
User Rank
CEO
Re: Intel, ARM Do Server Wrestling at ISSCC
Wilco1   11/6/2013 7:00:08 AM
NO RATINGS
Remember this is 18W for a 3GHz octo core at 40nm. A 22nm C2750 runs at 2.4GHz, uses 20W and cannot achieve anywhere near the same performance (X-Gene should have better than Cortex-A57 performance, while we already know Silvermont is slower than Cortex-A15 clock for clock).

So it looks like Avoton will be beaten by a huge margin on performance and power efficiency despite having the advantage of 2 process generations. Now imagine a next-generation X-gene at TSMC 20nm...

 

sw guy
User Rank
Rookie
Re: Intel, ARM Do Server Wrestling at ISSCC
sw guy   11/6/2013 6:52:14 AM
NO RATINGS
First time I hear of NoC as source of high power consumption.

Maybe it depends on actual topology and/or implementation ?

GSMD
User Rank
Manager
Re: Intel, ARM Do Server Wrestling at ISSCC
GSMD   11/5/2013 7:58:55 PM
NO RATINGS
Power8 also has external L4 cache as part of its memory controller which is also off-chip. Kind of a halfway house to HMC. The power battle is actually going to fought on the I/O side. Intel can dial up the core complexity depending on usage. No reason haswell core cannot be brought down to 1w per core. Cache sizes and execution units are the main variables. I would not change the front end too much as that is more painful to change between variants. The interconnect is a major power hog. No of rings can be altered as Intel has shown. ARM interconnects tend to be NoCs which actually consume more power than a ring. Interconnects like Bus enhanced NoCs or the swizzle switch from U Mich. do reduce noc/crossbar power. In short In terms of I/o arch, ARM is actually the laggard in terms of power. This will be evident if you do an apples to apples comparison. Intel needs higher I/o throughput and hence you are seeing higher power components. At those throughput levels , I suspect power dissipation is non-linear. We are doing some work on 28nm multi core that shows up some interesting results as you scale up. In the new atom server parts, you can see the wring not being used and a simpler cross type interconnect used instead. That is probably simpler though I still feel rings are more optimal in terms of power.

dynamited
User Rank
Rookie
Re: Intel, ARM Do Server Wrestling at ISSCC
dynamited   11/5/2013 5:52:53 PM
NO RATINGS
Did I read correctly the ARM offering was going to be 18watts (4x4.5)? Not exactly low power. Any anaylsis on building more chassis to house more processors that are less capable from a reliability point of view?

rick merritt
User Rank
Blogger
Re: Intel, ARM Do Server Wrestling at ISSCC
rick merritt   11/5/2013 5:51:32 PM
NO RATINGS
@Hang Lai: Power 8 looks really good, a whopping 96 Mbytes on chip L3 cache and other goodies. It's well above Intel Xeon. It was disclosed at Hot Chips in August

See: http://www.eetimes.com/document.asp?doc_id=1319358&page_number=2

 

HangLai
User Rank
Rookie
Intel, ARM Do Server Wrestling at ISSCC
HangLai   11/5/2013 3:44:21 PM
NO RATINGS
Any comments on IBM Power 8?

rick merritt
User Rank
Blogger
Ivytown is Ivy Bridge not Haswell
rick merritt   11/5/2013 2:39:49 PM
NO RATINGS
An earlier version of this story incorrectly stated Ivytown's heritage. Ivytown is an Ivy Bridge-class processor not a Haswell-class processor.

My apologies for the mistake.

Some Guy
User Rank
CEO
Re: Ivytown & ARM don't compete
Some Guy   11/5/2013 2:34:29 PM
NO RATINGS
@Rick - the point is that pie is already divided and the ARM is going after a piece that is already covered by Intel, which is already on its 2nd-generation Atom microserver chip before ARM is even out of the gate. Kind of like how the Japanese car makers were already on their 3rd-generation design of hybrid cars before Detroit ever got in the act.

At the same time, it will be interesting to see how it goes, especially when the advantages of ARM disappear with the microcode being less of the function blocks in the total chip, and the power advantage gone ... not to mention all the other server requirement, e.g., 64-bit, IO, cach, ECC, etc. The most ironic outcome would be that they end up with ARM creating a niche and it all ends up coming from Intel on its advanced process.

 

<<   <   Page 2 / 3   >   >>


Flash Poll
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Engineer's Bookshelf
Caleb Kraft

The Martian: A Delightful Exploration of Math, Mars & Feces
Caleb Kraft
3 comments
To say that Andy Weir's The Martian is an exploration of math, Mars, and feces is a slight simplification. I doubt that the author would have any complaints, though.

The Engineering Life - Around the Web
Caleb Kraft

Surprise TOQ Teardown at EELive!
Caleb Kraft
Post a comment
This year, for EELive! I had a little surprise that I was quite eager to share. Qualcomm had given us a TOQ smart watch in order to award someone a prize. We were given complete freedom to ...

Design Contests & Competitions
Caleb Kraft

Join The Balancing Act With April's Caption Contest
Caleb Kraft
54 comments
Sometimes it can feel like you're really performing in the big tent when presenting your hardware. This month's caption contest exemplifies this wonderfully.

Engineering Investigations
Caleb Kraft

Frankenstein's Fix: The Winners Announced!
Caleb Kraft
8 comments
The Frankenstein's Fix contest for the Tektronix Scope has finally officially come to an end. We had an incredibly amusing live chat earlier today to announce the winners. However, we ...

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)