On Sat, Jun 19, 2010, Shimon Panfil wrote about "platform for number crunching---resume": > b) nobody provides example of heavy *numerical* load without > overheating, kernel compilation for example is not relevant becouse > AFAIK compiler does not use floating point calculations and power > consumption and heating may be essentially different;
The key phrase in the above sentence is "may be". Do you have any reason to suspect why floating-point calculation take significantly more energy than integer calculations (and all the other things that go on, including memory refresh, and what have you)? Have you actually measured such a difference? I didn't, so I'm only guessing here, but my guess is that there may be a difference between the exact energy use of a tight FPU calculation loop and a tight integer calculation (or kernel compilation, or whatever), but I doubt it's a really significant different to the point of making a difference between a perfectly functioning 8-CPU machine and the heat-death of a 2-CPU machine... -- Nadav Har'El | Sunday, Jun 20 2010, 9 Tammuz 5770 n...@math.technion.ac.il |----------------------------------------- Phone +972-523-790466, ICQ 13349191 |This message contains 100% recycled http://nadav.harel.org.il |characters. _______________________________________________ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il