[CoLoCo] Odd load for sleep mode
ubuntu-us-co at toykeeper.net
Sun Sep 7 09:57:02 BST 2008
* Jim Hutchinson <jim at ubuntu-rocks.org> wrote:
> In the past, the uptime usually didn't include the time it was
> sleeping so I'm not sure which is the correct behavior.
Uptime is the wall-clock time since the kernel booted. It
includes time spent sleeping. If you want to know how much time
the system has been awake or active, use /proc/stat instead. It
shows the number of total and active kernel time slices, among
other data. The kernel time slices aren't a particularly
accurate measure of time, though.
> However, how could the load be over 9 after having just woken
Easy; that's pretty normal. Suspending and resuming are pretty
busy, active events, and they generate a load spike. And... no
kernel time passes while the system is asleep. That 15-minute
load average is probably 14 minutes from before the system
suspended, and 1 minute from after.
The load is based on waiting processes and kernel time. The
value, basically, is the number of processes ready to run,
averaged over time. They aren't necessarily active; they're just
waiting in line for the kernel's attention, whether they want CPU
time or data from the disk or whatever.
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