Slashdot Mirror

← Back to Stories (view on slashdot.org)

Mobile Phones vs. Supercomputers of the Past

Posted by timothy on from the crays-are-pure-sculpture dept.

An anonymous reader writes "The recently published Top 500 list of the world's fastest supercomputers is based on the Linpack benchmark developed decades ago by Jack Dongarra. This same test has been ported to Android mobile phones, which means that we can compare the performance of our phones against that of the supercomputers of the past. For example, a tweaked Motorola Droid can hit 52 Mflop/s, which is more than 15 times faster than the CPUs used in the 1979 Cray-1." But even today's most powerful cellphones don't come with an integrated bench.

4 of 247 comments (clear)

  1. Things like this... by Pojut · · Score: 5, Insightful

    ...make me kinda sad. On the one hand, I LOVE when I was born (1984). I'm old enough to remember a time without the Internet, without a PC in every home, and when cell phones were the size of briefcases...yet I'm still young enough to take advantage of technological innovations, keep up with advances, and appreciate the impact it has on our lives.

    On the other hand, I wonder how much amazing stuff I would see had I been born even just 20 years later. In my lifetime I have already watched (for example) the NES as a state of the art system turn into the average gaming PC having a video card capable of over 1 teraflop worth of processing power. How much extra innovation and advancement would I see if I had STARTED with those 1+ teraflop cards?

    "Fifteen hundred years ago everybody knew the Earth was the center of the universe. Five hundred years ago, everybody knew the Earth was flat, and fifteen minutes ago, you knew that humans were alone on this planet. Imagine what you'll know tomorrow." -Kay

    --
    Living With a Nerd
    1. Re:Things like this... by natehoy · · Score: 4, Insightful

      I'm only a couple of decades older than you. I agree with you, but I also realize that I take it as a given that, during the course of my lifespan, there's always been television (not color to start with, but there was TV), that indoor plumbing and lights have always been around, flight is not only possible but commonplace and pretty much always has been, and the moon landing happened before I was born.

      A part of me regrets missing the introduction of all of those exciting technologies and innovations, because to me they are all background things that just are. They aren't wondrous, they just are.

      No matter where you live in history, there are always improvements that you'll appreciate, but there's always amazing stuff that was there before that you will only see as part of the world as it's always been, and will be even more amazing stuff that will come after you that would probably blow your mind if you ever had the chance to see it (or would be so far beyond your comprehension you couldn't appreciate it).

      You don't truly appreciate the amazing parts of an advance unless you've watched those parts happen.

      To me, computers (and video games, etc), color/stereo televisions, microwaves, mobile phones, digital wristwatches, and many of the things you no doubt take for granted are marvels. When I was a kid, they largely did not exist. Which is not to say they all of them were completely unavailable, but when I was growing up no one I knew owned any of them and they were brand new.

      I both envy my grandparents (now all dead) and my yet-to-be-born grandchildren the wonders of their lifetimes that I will never see they way they do. The wonders of my grandparents are my commonplace items. The wonders of my grandchildren are probably beyond my imagination.

      But that's just human nature. We want to see it all. And eventually we learn we'll never succeed. It's both heartening and saddening at the same time.

      --
      "This post contains words, known to the State of California to cause thought. Wash brain thoroughly after reading."
    2. Re:Things like this... by adonoman · · Score: 4, Insightful

      It's pretty close to flat - the curvature of the earth is less than a foot per mile - a rounding error really, given that even the smoothest of prairies can easily vary by more than that.

  2. Ridiculous Comparison by Doc+Ruby · · Score: 5, Insightful

    For example, a tweaked Motorola Droid can hit 52 Mflop/s, which is more than 15 times faster than the CPUs used in the 1979 Cray-1.

    Cray's approach to supercomputing wasn't just to make the CPU fast. Indeed, he outcompeted faster CPUs by making all of his computers fast, so no power in the machine was wasted waiting for something else. Especially IO and memory were his focus for throughput. A Droid's CPU is bottlenecked by the rest of the device.

    This unfair comparison isn't just whining about missing Cray's point. There's a lot of power in that Droid that the SW can't exploit, because its bottlenecks leave the fast parts waiting. Not only does that slow them down, but it wastes electrical energy. Which is the biggest problem in mobile devices.

    LINPACK isn't the best way to measure supercomputers, and "nanocomputers" like mobile phones could be better if they learned something from Cray's research 40 years ago.

    --

    --
    make install -not war