Author:
Subject: Processors
Manufacturer: ARM

Cortex-A12 Optimized!

ARM is an interesting little company.  Years ago people would have no idea who you are talking about, but now there is a much greater appreciation for the company.  Their PR group is really starting to get the hang of getting their name out.  One thing that ARM does that is significantly different from what other companies do is announce products far in advance of when they will actually be seeing the light of day.  Today they are announcing the Cortex-A17 IP that will ship in 2015.
 
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ARM really does not have much of a choice in how they announce their technology, primarily because they rely on 3rd parties to actually ship products.  ARM licenses their IP to guys like Samsung, Qualcomm, Ti, NVIDIA, etc. and then wait for them to actually build and ship product.  I guess part of pre-announcing these bits of IP provides a greater push for their partners to actually license that specific IP due to end users and handset makers showing interest?  Whatever the case, it is interesting to see where ARM is heading with their technology.
 
The Cortex-A17 can be viewed as a more supercharged version of the Cortex-A12, but with features missing from that particular product.  The big advancement over the A12 is that the A17 can be utilized in a big.LITTLE configuration with Cortex-A7 IP.  The A17 is more power optimized as well so it can go into a sleep state faster than the A12, and it also features more memory controller tweaks to improve performance while again lowering power consumption.
 
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In terms of overall performance it gets a pretty big boost as compared to the very latest Cortex-A9r4 designs (such as the Tegra 4i).  Numbers bandied about by ARM show that the A17 is around 60% faster than the A9, and around 40% faster than the A12.  These numbers may or may not jive with real-world experience due to differences in handset and tablet designs, but theoretically speaking they look to be in the ballpark.  The A17 should be close in overall performance to A15 based SOCs.  A15s are shipping now, but they are not as power efficient as what ARM is promising with the A17.
 
Author:
Subject: Processors, Mobile
Manufacturer: ARM
Tagged: t622, mali, cortex, arm, A9, A15, a12

Cortex-A12 fills a gap

Starting off Computex with an interesting announcement, ARM is talking about a new Cortex-A12 core that will attempt to address a performance gap in the SoC ecosystem between the A9 and A15.  In the battle to compete with Krait and Intel's Silvermont architecture due in late 2013, ARM definitely needed to address the separation in performance and efficiency of the A9 and A15. 

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Source: ARM.  Top to bottom: Cortex-A15, A12, A9 die size estimate

Targeted at mid-range devices that tend to be more cost (and thus die-size) limited, the Cortex-A12 will ship in late 2014 for product sampling and you should begin seeing hardware for sale in early 2015.

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Architecturally, the changes for the upcoming A12 core revolve around a move to fully out of order dual-issue design including the integrated floating point units.  The execution units are faster and the memory design has been improved but ARM wasn't ready to talk about specifics with me yet; expect that later in the year. 

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ARM claims this results in a 40% performance gain for the Cortex-A12 over the Cortex-A9, tested in SPECint.  Because product won't even start sampling until late in 2014 we have no way to verify this data yet or to evaluate efficiency claims.  That time lag between announcement and release will also give competitors like Intel, AMD and even Qualcomm time to answer back with potential earlier availability.

Continue reading our overview of the newly announced ARM Cortex-A12 and Mali-T622!!

MWC 12: TI OMAP5 will beat your A9 with its own two cores

Subject: General Tech, Processors, Mobile, Shows and Expos | February 25, 2012 - 04:06 PM |
Tagged: texas instruments, MWC 12, arm, A9, A15

Texas Instruments could not wait until Mobile World Congress to start throwing punches. Despite their recent financial problems resulting in the closure of two fabrication plants TI believes that their product should speak for itself. Texas Instruments recently released a video showing their dual-core OMAP5 processor based on the ARM Cortex-A15 besting a quad-core ARM Cortex-A9 in rendering websites.

Chuck Norris joke.

Even with being at a two core disadvantage the 800 MHz OMAP5 processor was clocked 40 percent slower than the 1.3 GHz Cortex A9. The OMAP5 is said to be able to reach 2.5 GHz if necessary when released commercially.

Certain portions of the video did look a bit fishy however. Firstly, CNet actually loaded quicker on the A9 processor but it idled a bit before advancing to the second page. The A9 could have been stuck loading an object that the OMAP 5 did not have an issue with, but it does seem a bit weird.

About the fishiest part of the video is that the Quad-Core A9, which we assume to be a Tegra 3, is running on Honeycomb where the OMAP5 is running Ice Cream Sandwich.  Ice Cream Sandwich has been much enhanced for performance over Honeycomb.

We have no doubt that the ARM Cortex-A15 will be much improved over the current A9. The issue here is that TI cannot successfully prove that with this demonstration.