Messages in this thread | | | Date | Sat, 21 Jun 2008 23:22:09 +0200 | From | "Vegard Nossum" <> | Subject | Re: v2.6.26-rc7: Negative powertop values |
| |
On Sat, Jun 21, 2008 at 11:16 PM, Arjan van de Ven <arjan@linux.intel.com> wrote: > On Sat, 21 Jun 2008 21:16:37 +0200 > "Vegard Nossum" <vegard.nossum@gmail.com> wrote: >> I was testing v2.6.26-rc7 by running lmbench and hotplug/-unplugging >> CPUs and a few other programs at the same time. Powertop was showing a >> negative number of wakeups/second and average C3 residency was >> something really insane. Is there anything strange with this schedstat >> file, or is there another file I should look at that can explain the >> strange powertop numbers? Or maybe it's just an artifact of powertop >> and this has nothing to do with the kernel? > > powertop doesn't assume you do cpu hotunplug (and the internal state > goes wacky if you do). >
Oh right :-) Are there any plans to support this?
> [I assume you know that doing a software unplug you burn more power > than by leaving the cpu idle]
Well, yeah, this was purely to exercise the kernel a bit, IOW testing. I guess this can be signed off as a non-kernel issue, then. Thanks for the quick reply!
Vegard
-- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036
| |