5.4-prerelease - hanging under load

[Pierre-Luc Drouin]

Nate Lawson wrote:

> Pierre-Luc Drouin wrote:
>
>> 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?
>
>
> That is different.  sysctl hw.acpi.cpu.cx_lowest="C1" to see if that 
> works around it.
>
I already have this