Subject: General Tech, Processors, Mobile | September 27, 2012 - 12:26 PM | Tim Verry
Tagged: SoC, PowerVR, iphone, arm, apple, a6
Apple's latest smartphone was unveiled earlier this month, and just about every feature has been analyzed extensively by reviewers and expounded upon by Apple. However, the one aspect that remains a mystery is the ARM System on a Chip that is powering the iPhone 5. There has been a great deal of speculation, but the officially Apple is not talking. The company has stated that the new processor is two times faster than its predecessor, but beyond that it will be up to reviewers to figure out what makes it tick.
After the press conference PC Perspective's Josh Walrath researched what few hints there were on the new A6 processor, and determined that there was a good chance it was an ARM Cortex A15-based design. Since then some tidbits of information have come out that suggest otherwise, however. Developers for iOS disovered that the latest SDK suggest new functionality for the A6 processor, including some new instruction sets. That discovery tended credence to the A6 possibly being Cortex A15, but it did not prove that it wasn't. Following that, Anandtech posted an article that stated it was in a licensed Cortex A15 design. Rather, the A6 was a custom Apple-developed chip that would, ideally, give users the same level of performance without needing significantly more power – and without waiting for a Cortex A15 chip to be manufactured.
Finally, thanks to the work of the enthusiasts over at Chipworks, we have physical proof that, finally, reveals details about Apple's A6 SoC. By stripping away the outer protective layers, and placing the A6 die under a powerful microscope, they managed to get an 'up close and personal' look at the inside of the chip.
Despite the near-Jersey Shore (shudder) levels of drama between Apple and Samsung over the recent trade dress and patent infringement allegations, it seems that the two companies worked together to bring Apple's custom processor to market. The researchers determined that the A6 was based on Samsung's 32nm CMOS manufacturing process. It reads APL0589B01 on the inside, which suggests that it is of Apple's own design. Once the Chipworks team sliced open the processor further, they discovered proof that Apple really did craft a custom ARM processor.
In fact, Apple has created a chip with dual ARM CPU cores and three GPU cores (PowerVR). The CPU cores support the ARMv7s instruction set, and Apple has gone with a hand drawn design. Rather than employ computer libraries to automatically lay out the logic in the processor, Apple and the engineers acquired from its purchase of PA Semi have manually drawn out the processor by hand. This chip has likely been in the works for a couple of years now, and the 96.71mm^2 sized die will offer up some notable performance improvements.
It seems like Apple has opted to go for an expensive custom chip rather than opt for a licensed Cortex A15 design. That combined with the hand drawn layout should give Apple a processor with better performance than its past designs without requiring significantly more power.
At a time when mobile SoC giant Texas Instruments is giving up on ARM chips for tablets and smartphones, and hand drawn designs are becoming increasingly rare (even AMD has given up), I have to give Apple props for going with a custom processor laid out by hand. I'm interested to see what the company is able to do with it and where they will go from here.
Chipworks and iFixIt also took a look at the LTE modem, Wi-Fi chip, audio amplifier, and other aspects of the iPhone 5's internals, and it is definitely worth a read for the impressive imagery alone.
Subject: Mobile | November 12, 2011 - 04:07 AM | Tim Verry
Tagged: iphone, iOS 5, battery issue, apple
Owners of Apples’ latest iOS devices (especially 3GS, 4, and 4S iphones) have recently run into some battery life issues. Allyn did some testing and found that the latest iOS 5 operating system has a bug (among others) the phone is not able to enter standby mode thanks to a rogue process keeping the phone awake and wasting battery life. Apple was slated to put out the iOS 5.0.1 update, which was supposed to fix the battery life issues.
Well, the update has been released and many users are still experiencing battery life issues. Apple gave a statement to AllThingsD where it stated that although the recent iOS update addressed many of the battery issues, “we continue to investigate a few remaining issues.” According to this poll, approximately 35% (1,822 participants) are having the same battery issues after the update and nearly 14% are experiencing even worse battery issues than before the update. Conversely, almost 18% (910 participants) of people are getting improved battery life from the update. Lastly, a bit over 33% have not reported not experiencing any battery issues. The poll is currently based on a total of 5,145 respondents.
According to Apple, the battery issues are software related, so here’s hoping that they will get their iphones in a row and release an update to fix the issues. More information on Apple’s statement can be found here. Did the update fix your iphone’s battery woes?
Down to Business
While I'm mostly a PC guy, I favor iPhones. My friends always jab at me because I'm a fairly die-hard techie, and they expect me to be sporting the latest overclocked super-smartphone with eleventy-thousand gigs and a built-in dishwasher. While my phone used to be included in the list of things I tinker with endlessly, I eventually came to the point where I just wanted my smallest mobile device to 'Just Work' for those tasks I needed it to. I just didn't have the time to tinker endlessly with the thing that handled more and more of my work-related duties, yet as a techie, I still enjoyed the ability to cram a bunch of functionality into my pocket. That led me to the iPhone, which I've used since 2008.
Like many iPhone users, I've upgraded through the various iterations over the years. The original, 3G, 3GS, 4, and most recently the 4S. I've also witnessed nearly every iteration of Apple's iOS (including many of the betas). Throughout all of these, I feel Apple did their best to prevent new versions from breaking application functionality, and while they did their best to keep bugs under control, every so often a few would creep in - typically with cross-compatibility of new features that could only be tested in a limited capacity before being released into the wild.
Apple's iPhone 4S introduced some added features to their line-up - enough to get me to bite the bullet earlier than I typically do. I was a bit of an iOS 5 veteran by then, as I'd been using it to test applications for a developer friend of mine. While some of the iOS 5 betas were a bit unruly in the battery life category, those problems appeared to be sorted out by the last and final beta prior to release. With my reservations against the new OS put to rest, the only thing holding me back was the possibility of the new dual core CPU drawing more power than the iPhone 4. The iFixit teardown (which revealed a higher capacity battery - presumably to counter power draw of the additional CPU), coupled with the improved camera and witnessing the endless toying around with Siri finally got me to bite the bullet.
I picked up a 4S from my local Apple Store, restored from the backup of my 4, and off I went. I enjoyed the phone for a few days, but quickly realized there was some sort of issue with battery life. The most glaring indicator was one night where I forgot to plug the 4S in before bed. The next morning I was surprised to find that nearly 40% of the charge was lost while I slept - almost enough to completely shut down the phone (and failing to wake me with the alarm I'd gleefully set via Siri the night before).
Introduction, Specs, Design and Ergonomics
Samsung's Galaxy S II smartphone debuted in the U.S. with Sprint, AT&T, and T-Mobile in September and we finally got our hands on a review sample. The Samsung smartphone runs on Android 2.3 "Gingerbread" operating system and includes an 8 MP camera with LED flash and 1080p video, front facing 2 MP camera, and Samsung’s custom TouchWiz user interface.
T-Mobile and Sprint’s version sports a 4.52-inch display, but AT&T’s version has a 4.3-inch screen that matches the original international version of the Galaxy S II. We are reviewing T-Mobile's Galaxy S II with 16GB of internal memory (there are two options for 16 and 32 GB). The Sprint and AT&T versions are outfitted with a dual-core 1.2 GHz Orion processor, but the T-Mobile version we are reviewing today sports a Qualcomm Snapdragon S3 1.5 GHz dual-core CPU.
With Google reporting daily Android device activations upward of 550,000 devices a day, the rapid growth and ubiqutity of the platform cannot be denied. As the platform has grown, we here at PC Perspective have constantly kept our eye out for ways to assess and compare the performance of different devices running the same mobile operating systems. In the past we have done performance testing with applications such as Quadrant and Linpack, and GPU testing with NenaMark and Qualcomm's NeoCore product.
Today we are taking a look at a new mobile benchmark from Qualcomm, named Vellamo. Qualcomm has seen the need for an agnostic browser benchmark on Android, and so came Vellamo. A video introduction from Qualcomm's Director of Product Management, Sy Choudhury, is below.