5.4-prerelease - hanging under load

[Pierre-Luc Drouin]

Matthias Buelow wrote:

>Nate Lawson <nate at root.org> writes:
>
>  
>
>>sysctl dev.cpu and look at the current frequency setting.  If low, then 
>>your system is affected and will be fixed soon when I mfc.  If not, 
>>perhaps you have an interrupt storm (vmstat -i)
>>    
>>
>
>Just for the record. I ran vmstat -i in a loop while untarring the
>thunderbird source (causing degraded interactive responsiveness, as
>reported in an earlier mail), and couldn't see any noticable increase in
>interrupt rate.
>
>mkb.
>
>  
>
I've noticed that the idle process is using sometimes as much as 60% of 
my CPU. Could it be a relation between that and the lag we have with 5.4?