Nanotech - The Circuits Blog

Firefox has a CPU usage issue and, consequently, can cause overheating problems in some laptops, particularly ultraportables. That's what I've found over the last couple of years.

But don't take my word for it. This is documented on a Mozilla support page entitled "Firefox consumes a lot of CPU resources." The page states: "At times, Firefox may require significant CPU [central processing unit] resources in order to download, process, and display Web content." And forum postings like this one about a Dell Netbook are not uncommon: "Mini9 would get way too hot."

The Mozilla support page goes on to say that "you can review and monitor CPU usage through specific tools" and describes ways to limit CPU usage, such as: "A Firefox add-on, called Flashblock, allows you to selectively enable and disable Flash content on Web sites."

Let me describe my experience. I find that tab for tab, Firefox uses decidedly more resources than other browsers--Safari, for example. And in the past (when I was actively using a Windows Vista-based machine) Firefox also compared unfavorably with Microsoft's Internet Explorer for CPU usage.

More specifically, here's the behavior as I see it. When I'm accessing sites with multimedia content such as the CNET front door, Firefox CPU usage will bounce around between 30 and 60 percent, and sometimes spike higher (80 percent and above), as indicated by the Mac OS 10.6.2 Activity Monitor.

On the other hand, the Safari CPU usage with the same pages open is much lower--typically between 2 percent and 10 percent.

My theory is that most users don't notice this because in mainstream laptops, this isn't an issue. But it can become an issue in ultraportables--typically under an inch thick--which are more sensitive to heat because of the design constraints. The ultrathin Apple MacBook Air, which I use as my main machine, is a good example.

The fan is usually an audible indicator of CPU usage issues. When I'm using Firefox and I have tabs open on multimedia-rich sites (which is par for the course these days), the Air's fan will almost invariably kick on and stay on until I close the tabs. As I write this, the fan has finally shut down after I closed the Firefox tabs (e.g, CNET front door). Those same tabs in Safari are still open and not causing any significant spike in CPU usage or fan activity.

When I contacted Mozilla, a technical support person guessed that Safari is possibly better at optimizing Flash-based sites compared to Firefox. And that may be true. However, I had similar issues before when I was using a Hewlett-Packard business ultraportable (also very thin like the Air) that were not necessarily tied to Flash usage. In short, Firefox was less efficient with CPU usage compared to Microsoft's IE 8. And the behavior was similar. The HP laptop would quickly heat up and the fan would kick on.

Finally, let me reemphasize that I'm guessing that most users don't notice this because heat dissipation is not a big issue for mainstream laptops that are not necessarily thermally-challenged when accessing multimedia-rich Web pages. That said, this has been a steady problem for me because I use ultraportables almost exclusively and has forced me to limit my use of Firefox.

I'm going to break from the well-established tradition of comparing Netbooks to notebooks. This time my yardstick is going to be the smartphone. And no better yardstick than the Apple iPhone.

Verizon is selling Netbooks as kind of an upscale smartphone

(Credit: Verizon)

This post updates a year-old piece (which, by the way, at least one writer took exception to).

As the holiday-shopping season approaches, many consumers face an ostensible choice between an inexpensive Netbook or more expensive notebook. I personally face that choice (or, at least, I thought I did).

Let me state up front that though I have used Netbooks on a temporary basis, I have never owned one.

I (now) believe that Netbook comparisons to mainstream laptops (which will always disappoint because Netbooks are slower, screens smaller, keyboards more cramped--and this list of comparative shortcomings is long) is really the wrong way to look at it. Let me illustrate.

I recently interviewed the chief technology officer for a large school district in Louisiana that had purchased a lot of Netbooks. And I asked what I thought was the most pertinent question: weren't performance and screen size a concern? She quickly pointed out that my perspective was all wrong.

In short, students in K through 12 are accustomed to iPhone-size screens and performance. So moving to a Netbook is a big step up. From this perspective, the screens are large, the keyboards expansive, and the performance more than adequate.

This suddenly made a lot of sense to me because of my personal experience. Take the iPhone 3GS (or Motorola Droid or BlackBerry Storm, take your pick ). To state the obvious, in many respects, this is a personal computer platform for e-mail, texting, Web surfing, music, navigation, YouTube, and the list goes on.

In other words, the iPhone is for consuming data and media as well as light production. Like the Netbook. But the Netbook, obviously, takes this to the next level. It adds a keyboard and a larger screen, which also makes it potentially a better production platform. So, it's an iPhone Plus, if you will.

And here's the real proof in the pudding. Where do you see Netbooks being sold these days (think Nokia Booklet)? At phone carriers, like Verizon. The last time I visited a Verizon store, it had 3G Netbooks prominently displayed right next to the Motorola Droid.

The point seems obvious to me now. Want to be more productive? Step up to a Netbook. And this follows the same logic of the CTO at the Louisiana school district. And upcoming tablets and media pads from Apple and others will also be marketed as a high-end iPhone-like device, in my opinion.

So, in the next month or so when I try to sort out which Netbook to buy (This CNET review says the HP Mini 5101 is one of the best Netbooks on the market now), I'll be shopping for an upscale smartphone not a stripped-down notebook.

NOTE: I'm not suggesting that anyone replace their iPhone with a Netbook. My point is that a Netbook can be used as an inexpensive adjunct to an iPhone or Droid for people who need to be more productive than an iPhone (or Droid) would allow.

Though the Motorola Droid and Apple iPhone have different chassis, their high-octane engines are similar.

The internal similarities begin with performance: both devices are fast. The iPhone 3GS is already distinguished for its speed. And the Droid is quickly garnering similar accolades.

The Motorola Droid has a radically different exterior compared with the iPhone but uses a speedy Cortex-A8 ARM chip like the Apple phone.

(Credit: CNET Reviews)

"The Droid makes a big leap in internal performance. Compared with its rather sluggish Android predecessors," CNET Reviews said, citing the speed at which the Droid opens applications and menus and scrolls through lists and switches display screens.

"We're really pumped to see all the industry excitement it's created," said Jeff Dougan, the OMAP 3 product marketing manager at Texas Instruments, which supplies the OMAP 3430 processor that powers the Droid. "This is the first handset that truly realizes the full potential of Android," he said, referring to Google's Android 2.0 operating system that runs on the Droid phone.

The TI processor, like the one in the iPhone, is based on an a new architecture called Cortex-A8 from U.K.-based chip design house ARM, whose wide variety of chips populate most of the world's cell phones. Dougan says most smartphones currently on the market use an older, lower-performance ARM architecture than the Cortex-A8--with the exception of the Palm Pre, which opted for the newer TI chip. The Cortex-A8 provides a "two to three times performance boost" over older architectures, according to Dougan.

Max Baron, an analyst at Microprocessor Report, says the chips in the Droid and the iPhone (see not below) are so alike that differences are more dependent on the operating systems the two chips use and how successfully each phone maker optimizes the OS. "With chips that have near-similar specs, the optimum OS and the look-and-feel of the user interface may make or break the product," Baron said.

The core of TI's OMAP3 processor.

(Credit: Texas Instruments)

"The caveat, however, is that even small differences in chips will surface and become important differentiators as soon as the market forces you to increase the screen size or add more pixels per screen, or execute more power-consuming applications," he added.

The raw MHz ratings on the chips are slightly different. The processor in the iPhone 3GS--which is believed to be based on the Samsung S5PC100 processor--runs at 600MHz, according to most accounts. The Motorola Droid's TI chip is rated at 550MHz though theoretically it can be run as fast as 600MHz, according to TI's Dougan.

Both phones also use PowerVR graphics from Imagination Technologies--a company that both Apple and Intel have invested in, testifying to how hot its ultramobile graphics technology is. The PowerVR SGX is renowned for its ability to process several million triangles-per-second--a key indicator of graphics chip performance--blowing away other phones and the previous version of the iPhone.

Other internal specifications are similar between the two phones, including memory capacity (either 16GB or 32GB) and communications chips that offer 3G, Wi-Fi, and Bluetooth connections.

So, internally the Droid is every bit the iPhone's equal. And future versions of TI OMAP 3 chips that may appear in upcoming Droids will be backed by formidable ecosystems, according to Baron. "Investments in application software may lean more toward the TI components," said Baron, given TI's strong support of the entire chip ecosystem, including auxiliary chips and software development tools.

Note:: Apple's and Samsung's reluctance to release information about the processor used in the iPhone 3GS has made it difficult to determine if the chip is based on the Samsung S5PC100, according to the Microprocessor Report's Baron. Many iPhone 3GS reviews and teardowns, however, state explicitly that the iPhone's processor is essentially the Samsung S5PC100 processor.

If the speculation about a new MacBook Pro is on the money, the step up to Intel's quad-core mobile technology would have a profound impact on this vaunted line of Apple laptops.

Is a Core i series Apple laptop on the way?

(Credit: Apple)

So, why would Apple adopt a Core i processor in a laptop? The short answer is OS X Snow Leopard. The new operating system is designed to be better at wringing more performance out of multicore processors--and the Core i chips pack four cores.

The long answer is the Core "i" chips themselves. The Core i, a.k.a. "Nehalem," is a brand new Intel microarchitecture brimming with performance improvements over the current Core 2 design.

For starters, the recently announced mobile i7-820QM processor integrates a hefty 8MB of cache memory--compared with the 6MB in the fastest Core 2 Duo that Apple currently offers on the MacBook Pro. Generally, the larger the cache memory, the better the performance.

But Intel has done a lot more than just up the transistor count via a larger cache. While the quad-core i7-820QM is rated at 1.73GHz, a single core can be "overclocked" to 3.06 GHz. Intel does this with a technology dubbed Turbo Boost, which speeds up and slows down individual cores to meet processing and power-efficiency needs, respectively.

Need more convincing? The Core i7 also comes with Hyper-Threading, which can double the number of tasks--or threads--a processor can execute. You won't find that in the Core 2 chips.

Digital media creation also gets a boost. Intel claims up to 81 percent faster video encoding.

And the mobile Core i7 is not a power hog--relatively speaking. The i7-820QM is rated at 45 watts, less than a third of the power envelope of the desktop Core i7. With such a powerful processor, heat would be an issue of course but the 45-watt power envelope is manageable.

That said, there are reports that Apple is not bringing out any more products this year. So, along these lines, alternatively, Apple could opt initially for the upcoming "Arrandale" Core i chips--due by the beginning of next year--that are based on a more advanced 32-nanometer manufacturing process. (Current Core i processors use a 45-nanometer process.)

Arrandale integrates graphics silicon into the same chip package as the main processor--a first for Intel. Because of this high level of integration, Arrandale, however, is a dual-core chip.

But probably the closest thing to a rumored MacBook Pro refresh is the iMac, which has the same space-constrained characteristics of a laptop. The quad-core Core i7 in the new iMac "boosts application performance up to 2x over the previous-generation iMac," according to Apple--and that's what consumers can expect with a Core i series laptop.

By not coughing up a low-cost MacBook, as some had expected, Apple has ceded a potentially huge market to PC makers. But is this just all part of Apple's marketing genius?

$999 is as low as Apple will go.

(Credit: Apple)

The announcement Tuesday of the $999 white polycarbonate MacBook was pretty ho-hum as product refreshes go (same price, same color as before) but the implication was important: Apple is surrendering a large, emerging laptop market to Microsoft and its coterie of PC makers.

Not that it's necessarily a bad strategy. Market researcher Gartner said recently that Apple's shipments in the U.S. grew year-over-year by 6.8 percent to total 1.57 million during the third quarter, putting it right behind Hewlett-Packard, Dell, and Acer. Comparatively, overall PC shipments in the U.S. grew by 3.5 percent from a year earlier.

But among those unimpressive overall PC numbers (HP's third-quarter shipments grew only 2.7 percent), was an impressive statistic for Acer: buoyed by Netbooks, Acer's shipments grew by 61.4 percent year-over-year, and it blew past Dell to become the No. 2 PC maker worldwide based on this growth.

Granted, Netbooks are a relatively low-profit segment (i.e., profit on a $400 Netbook is going to be a lot less than that on a $999 laptop). Nevertheless, they're a hot market. Intel CEO Paul Otellini has stated numerous times that Intel was able to create a market that grew faster than either the iPhone or Nintendo Wii. Case in point: Windows 7-based Acer Netbooks are now big on the Home Shopping Network--which claims to have sold more than 5,000 in one segment on Saturday.

And that's not the only market Apple is punting on. A new category of inexpensive, thin laptops has emerged with the roll-out of Windows 7 on Thursday. Like Netbooks, these laptops are light (typically 4 pounds) and don't include an optical drive. But they are relatively powerful and full featured. The 15.6-inch Acer Aspire Timeline, for example, with a 320GB hard disk drive and dual-core Intel processor is fairly well-endowed at only $500.

Apple is not receiving a lot kudos in the mainstream business press ... Read more

Drop the word "Apple" into any discussion with any company and the effect is nothing short of remarkable.

This innocuous logo can evoke fear

Over the last year, I have talked to middle-level and high-ranking executives at enough companies to know exactly what to expect when the topic of Apple is broached: fear.

A recent interview with a fairly big company provides an example as good as any. (But I could cite a much bigger company too, it's doesn't seem to matter.)

The way this interview proceeded was typical. Most of it was devoted to questions about the company's product plans (unrelated to Apple)--and the interviewee divulged plenty of information. A smaller slice of the interview was about customers or companies related to the interviewee (again, unrelated to Apple). Here, queries were answered with differing levels of transparency. Though less was revealed, nothing was a conversation stopper.

Then, toward the end, the conversation turned to Apple--which is not unusual as Apple's tentacles are everywhere, particularly in the case of hardware. My question began something like: "So, I understand Apple is..." The response was remarkably consistent with past interviews. I quote from the mid-level manager: "I don't want to lose my job." I've heard variations on this job security (I-have-absolutely-nothing-to-say) theme related to Apple during the last 12 months or so.

The angst is always palpable. When the interviewees clam up, then quip something like "I like getting a paycheck every month," with a wry smile, they aren't joking. And these people don't even work for Apple.

I haven't written about the Apple gag-order syndrome until now because it hadn't struck me as that surprising, i.e., the stock phrase "I can't comment on another company's product plans" is used often--not to mention the legal weight of nondisclosure agreements.

But this changed a few months ago when I realized how the Apple question consistently evokes fear (or call it distinct unease) in many interviewees.

A sensational claim? Maybe it sounds that way. But I'm calling it as I see it.

Why Apple? It's not a stretch to say that Apple is probably one of the most secretive companies in Silicon Valley. But it's also one of the most influential and, consequently, most powerful. How do I know this? This middle-level manager at this fairly big, independent, and successful company felt compelled to comment on his job security twice. And the second time he said it, the smile had clearly left his face.

Updated at 4:40 p.m. PDT: adding to discussion of next-generation Nvidia Ion chip.

As graphics kingpin Nvidia tries to reshape itself into a broad-based computing company, it is taking big gambles with potentially big payoffs, while it fends off challenges from rivals Intel and Advanced Micro Devices.

The world's largest supplier of standalone graphics chips for PCs needs to grow. Established markets have matured and Nvidia must seek out other ways to make money.

Nvidia's Fermi-based GF100 graphics processor.

"In almost every market they have entered they have become dominant," said Jon Peddie, president of Jon Peddie Research, which tracks the graphics chip market. "Almost 90 percent market share in the workstation business and 55 to 65 percent in the graphics business. But if you're that successful you can't really grow the market anymore, and if you want to keep growing your company, then you have to get into new markets."

Enter supercomputing and Nvidia's brand-new Fermi architecture. "That's a huge market and big margins," said Peddie. Fermi was announced last week at an Nvidia conference to great fanfare when prestigious Oak Ridge National Laboratory said it plans to use Fermi in a future supercomputer.

It would be an understatement to say that the Fermi chip potentially packs a computing wallop. The chip integrates an astounding 3 billion transistors, about three times the number of transistors in Nvidia's most powerful graphics chip now on the market, and it has been designed with features that make it more suitable for high-performance computers, the first time that Nvidia has architected a chip this way.

Fermi GPUs, each containing 512 processing cores, would enable "substantial scientific breakthroughs" that would be impossible without the new technology, Jeff Nichols, Oak Ridge's associate lab director for computing and computational sciences, said last week.

Nvidia hopes to parlay this computing power into the mainstream. (For a comparison of Fermi with AMD's newest graphics chip see: ATI and Nvidia face off--obliquely.)

"Fermi will offer Nvidia the opportunity to grow our consumer business by having the fastest raw graphics power," said Drew Henry, general manager of Nvidia's bread-and-butter GeForce graphics business. "But it's also going to expand our business by allowing people to process better video and photo applications and to use the GPU for many, many more mainstream applications." (GPU stands for graphics processing unit.)

... Read more

LOS ANGELES--Adobe Systems' announcement of tools to create applications for the Apple iPhone comes with some restrictions.

Adobe announced on Monday at Adobe MAX, the company's worldwide developer conference, that its Flash Professional CS5 developer tool will enable developers to create interactive applications for the iPhone and iPod Touch. A public beta of Flash Professional CS5 is expected to be available later this year.

In an interview at the conference Monday, Anup Murarka, director of technology strategy and partner development in Adobe's platform development unit, spelled out some of the limitations of creating Adobe Flash-style apps for the iPhone. These limitations exist because the Adobe Flash player is not supported on the iPhone.

Murarka clarified that Monday's announcement was not a joint announcement with Apple. "This is an Adobe announcement. This is just something that's related to our tools and what they output, which is a native iPhone app," he said.

"So, we're not running Flash directly on the device. We're actually allowing our tools to output for native iPhone apps," Murarka explained.

He then described some limitations. "Let's take it from the developer's point of view. They have a very rich environment and language. That's in Flash today," he said. "You're not going to get all of the Flash feature set that would normally be there in the run-time."

Murarka continued: "For example, high-quality video, H.264, is not available with this product because Apple does not make available the decoders. They make you use their own UI (user interface) to play back high-quality video." Apple describes the H.264 video codec as delivering "stunning quality at...low data rates."

He also cited synchronization. "Being able to do synchronization between data and video. Those can be built as Flash applications. In sporting events (for example) using flash for data overlay. Those types of things are not going to possible because we don't have access to the APIs (Application Programming Intefaces) that would give us the video decode along with all of the individual frames so we can do synchronization," he said.

And he spoke about graphics effects. "Some of the filter effects. Some of the capabilities that as a programmer you would easily do within Flash are not available as they are not natural APIs that iPhone platform makes available to us."

Murarka concluded by saying that Adobe continues to work with Apple towards getting Flash on the iPhone. "We're not there as quickly as we would like. We're not able to put Flash in the browser. We're not able to put a Flash run-time on the device directly. But this is a good step," he said.

Nvidia's new Fermi chip is being billed as a supercomputing chip but Nvidia doesn't want you to forget that it is also aimed at Apple's Snow Leopard and Windows 7.

The Fermi chip was announced with much fanfare on Wednesday as key silicon in a future supercomputer from Oak Ridge National Laboratory. But, wait, Fermi is also going to be great at accelerating stuff in Snow Leopard and Windows 7--not to mention a great gaming chip, according to Bill Dally, chief scientist at Nvidia who spoke during a conference call with analysts on Thursday.

The Fermi graphics processing unit (GPU)--which packs 512 processing cores--will support DirectX-11, a technology for speeding certain multimedia software in Windows 7, and also support an analogous technology in Snow Leopard, OpenCL.

"A lot of (the chip's new) features accelerate key consumer applications. Both Snow Leopard and Windows 7 enable the GPU to be used as a co-processor to accelerate third-party applications," Dally said. With a "discrete (standalone) GPU they can get very good performance on these applications," he said.

Applications that Nvidia says will be accelerated by the Fermi chip

(Credit: Nvidia)

Dally gave examples (see graphic) of consumer titles such as Adobe's Creative Suite, Motion DSP's vReveal (for fixing photographs), and Badaboom (for creating iPod video).

He offered a qualifier, however. "We are paying a bit of a compute tax in that we launched a part where a lot of the consumer compute applications haven't really taken hold yet. But over time as more consumer computer applications are developed that take advantage of our compute (consumer) features...I think it's going to give us a big leg up," he said.

And being an Nvidia chip, games are a big target market. "Fermi adds value to games by doing exactly the same kind of scientific simulations that we use to predict climate and to understand the genome and other things," according to Dally. "A great example of that is our PhysX package that basically does physical simulations to make games appear more real."

He also explained why the chip was billed as a supercomputer chip initially and not a gaming chip. "It's a zero-sum game. You have a certain amount of die (chip) area, a certain power budget. It is the case that we put a bunch of die area into double-precision floating point, a bunch of die area into ECC. And for gaming graphics applications, those give less returns than they do for the scientific applications," he said. Double-precision floating point operations are used heavily in scientific computing. ECC, or error correcting code, is a technology that can correct data errors on the fly.

And Dally explained how Fermi can be scaled down to lower-end chips used in the gaming and consumer segments. "We're not talking about other (chips) at this point in time but you can imagine that we can scale this part by having fewer than the 512 cores and by having these cores have fewer of the features, for example less double-precision," he said.

All the Fermi products, including gaming and professional workstation chips, will be announced "pretty close together." Chips are expected sometime in the coming few months.

And how does Fermi stack up against current public information about Intel's future "Larrabee" graphics chip? "We can't compare anything to Larrabee until it shows up and can actually be measured," said Jon Peddie, president of Jon Peddie Research, which tracks the graphics chip market. "But remember, Larrabee was started over two years ago and both ATI and Nvidia have had two new designs out since then," he said. "So the pressure will be on Intel to chase fast-moving ATI and Nvidia," Peddie said. ATI, which is Advanced Micro Devices' graphics chip unit, already has a chip in stores--the Radeon HD 5800-- that supports Windows DirectX-11.