From: jamal <[EMAIL PROTECTED]> Date: Mon, 30 Jul 2007 21:10:39 -0400
> acpi_pm: 108, 110, 111, 91, 108 > tsc: 143, 108, 161, 129, 108 > jiffies: 132, 138, 132, 146, 150 > > jiffies produces better results than tsc which produces better results > than acpi_pm. Relatively speaking, the acpi_pm numbers are at least consistent and about as much as so as jiffies. Jiffies numbers are also possibly better, at least in part, because of the decreased accuracy and errors propagating. tsc acts as expected, since every time your cpu changes power management state (which it is going to do dynamically) the TSC rates change and thus the accuracy goes into outer-space. There really isn't much that can be done by any of this. These issues exist because of hardware limitations, nobody bothered to build x86/x86_64 systems with a system wide TICK register that is both impervious to cpu frequence scaling and also cheap to access. So the above is what we basically have to live with :-) - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
