Arch Linux

Dornith

Member

Registered: 2013-02-19

Posts: 84

High CPU Load w/ Low CPU Usage after Hibernate

Note: I haven't had this issue in about a month, so I cannot recreate it and it may have been fixed in a kernel update of some kind.  At this point, I'm asking more out of curiosity.

I tend to use browser tabs/open documents to keep my train of thought between tasks, and so I often hibernate instead of doing a full shutdown.  But for quite a while I had an issue where after I would resume from hibernate, the system would take 10-15 minutes to become responsive.  At the same time, I always had a high CPU load (as reported by i3status to be somewhere in the range of 15-25 processes in queue) and extremely low CPU usage (i3status reporting 3-15%).  This seems extremely weird to me for a number of reasons.  I have a quad-core i5 processor, so even if every process was for some reason assigned to the same core, shouldn't it still use 25%?  And why wouldn't it use every core available with such a long queue?

Image of processing:

If it happens again I'll see if I can grab some logs but I recall looking though dmesg and not finding anything helpful.

blackout

Member

Registered: 2014-05-21

Posts: 38

Re: High CPU Load w/ Low CPU Usage after Hibernate

Provide some (h)top information
and
watch -n1 -d "cat /proc/interrupts"