Re: Interrupt latency on some 945GM platforms

Stefan Biereigel
2010-09-27T05:45:58Z

Hello Everyone,
>> just to add on to reports of this problem, there was a Thread here in LKML
>> some months ago targeting the same problem (but not really attacking it at
>> the Chipset driver). As I have one of those Laptops with a 945GM-Chipset and
>> am stuck with the same Problem (disabled tickless now as a workaround and
>> set ticks to 1000) I could maybe do some testing of patches.
>> So what I can summarize is what the others did before: Disabling CPU1 helps,
>> adding nohz=off helps, changing the Clocksource afterwards helps, binding
>> the Interrupt does NOT help.
>> So here's the Link to the old Discussion with follow-ups, maybe you can get
>> some furter information from there.
>> http://linux.derkeiler.com/Mailing-Lists/Kernel/2010-05/msg03696.html
>> We targeted the BIOS itself as everyone in this thread happened to own an
>> Phoenix BIOS with some special version string.
>> best, Stefan
>>
> does disable msi help with 'pci=nomsi'?
>
No, here it doesn't.