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On Tue, 2005-06-21 at 09:07 -0400, Arjan van de Ven wrote: > On Tue, 2005-06-21 at 13:35 +0100, Alan Cox wrote: > > On Maw, 2005-06-21 at 07:54, Andrew Morton wrote: > > > CONFIG_HZ for x86 and ia64: changes default HZ to 250, make HZ Kconfigurable. > > > Will merge (will switch default to 1000 Hz later if that seems necessary) > > > > This has been in Fedora for a while. DaveJ can probably give you more > > info. From own testing 100Hz is how far down you want to go to avoid > > random clock slew on laptops and to see power improvements. > > actually 250Hz is a not so fun value. 300 is a lot nicer (multiple of > both 50Hz and 60Hz and thus covers most TV standards) Sorry, the ITU-R "M" standard specifies 30000/1001 frames (60000/1001 fields) per second, that's close to 30/60 but not the same. Now please please don't make use run HZ = (60000/1001 * 5) or similar ;-) BTW it seems to me that power management using C2/C3 states will work much more efficiently with a lower HZ because the chipset/processor will be a larger percentage of the time in c2/c3 mode, right? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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