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SubjectRe: [E1000-devel] e1000 1sec latency problem
Kok, Auke wrote:
> Max Krasnyansky wrote:
>> So you don't think it's related to the interrupt coalescing by any chance ?
>> I'd suggest to try and disable the coalescing and see if it makes any difference.
>> We've had lots of issues with coalescing misbehavior. Not this bad (ie 1 second) though.
>>
>> Add this to modprobe.conf and reload e1000 module
>>
>> options e1000 RxIntDelay=0,0 RxAbsIntDelay=0,0 InterruptThrottleRate=0,0 TxIntDelay=0,0 TxAbsIntDelay=0,0
>
> that can't be the problem. irq moderation would only account for 2-3ms variance
> maximum.
Oh, I've definitely seen worse than that. Not as bad as a 1second though. Plus you're talking
about the case when coalescing logic is working as designed ;-). What if there is some kind of
bug where timer did not expire or something.

Max


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