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Wistron Shows Montavista Phone (PC Magazine)Wistron Shows Montavista Phone (PC Magazine)Posted Jan 8, 2008 18:41 UTC (Tue) by mtaht (subscriber, #11087)In reply to: Wistron Shows Montavista Phone (PC Magazine) by epa Parent article: Wistron Shows Google Android Phone (PC Magazine)
Re: Amdahl's law - Amdahl's law applies to many things besides strictly computation and I should have made that more clear, above. It also applies to all the processes/tasks and requirements that go into making a product. If your goal is to make a product that does x,y, and z, size s, weight w, and has a day of battery life, the cost of the battery life and the weight dominates over how good x,y,z can be - and you end up (currently) with 64MB of ram (128MB on a good day) and a 200Mhz processor in a typical cell phone.
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Wistron Shows Montavista Phone (PC Magazine) Posted Jan 8, 2008 19:40 UTC (Tue) by mtaht (subscriber, #11087) [Link] I wish I could edit my own comments... the bold clarifies:Re: Amdahl's law - Amdahl's law applies to many things besides strictly computation and I should have made that more clear, above. It also applies to all the processes/tasks and requirements that go into making a product by a certain date. If your goal is to make a product that does x,y, and z, size s, weight w, and has a day of battery life, the cost of the battery life and the weight dominates over how good x,y,z can be - and you end up (currently) with 64MB of ram (128MB on a good day) and a 200Mhz processor in a typical cell phone. The equation is roughly the same as amdahls, with some more complicated terms thrown in for things like battery life, I wish there was formally published something that threw in terms for the rate of battery life increase vs weight, etc. The only "out" of this cruel equation has been "better software" - things like the tickless kernel, for example, have come out of the quest for better power consumption. Also, libraries like what nokia has (maemo's OSSO hooks) for signalling applications when the screen is off, keyboard present, or the device is changing sleep states have been proven useful (and I hope that more Linux applications start paying attention to screen states in particular)
Wistron Shows Montavista Phone (PC Magazine) Posted Jan 9, 2008 14:11 UTC (Wed) by epa (subscriber, #39769) [Link] It seems like you've generalized Amdahl's Law so much that it says 'you can't please all of the people all of the time', or something like that. To be a 'law' it needs a quantitative definition - do you have one? From a quick search I can't see anyone using Amdahl's Law in any sense other than the limits of speeding up a computation.
Wistron Shows Montavista Phone (PC Magazine) Posted Jan 9, 2008 18:13 UTC (Wed) by mtaht (subscriber, #11087) [Link] Yea, I'll work on it.
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