Hi Matthew,
Bingo !!!!. It has solved first issue.
Thanks for doing it.
I will open an issue on SourceForge page for the same with all the
details.
One thing I want to put here is with this change I don't see a
major drop in CPU utilization in case of 82574 chip. (It is same even
with setting constant values like 3000 or 8000) Whereas I can see good
amount of drop in 82571/572/573 chips.
I do see less number of interrupts in vmstat but CPU utilization
is not dropping the way it is dropping for other chips.
Rgds,
Nishit Shah.
On 6/13/2012 4:52 AM, Vick, Matthew wrote:
>> -----Original Message-----
>> From: Nishit Shah [mailto:[email protected]]
>> Sent: Tuesday, June 05, 2012 11:19 PM
>> To: Vick, Matthew
>> Cc: [email protected]
>> Subject: Re: [E1000-devel] problem with simplified balancing on 82574
>> chips
>>
>>
>> Thanks for taking it up.
>> Let me know in case if you require any help from my side.
>>
>> Rgds,
>> Nishit Shah.
> I have a patch that resolves the first issue you're seeing (long ping times).
> I have not had time to look at the second issue you've reported yet. Can you
> please test out the patch below and let me know if it resolves your first
> issue?
>
> For the patch, you can either open an issue on our SourceForge page where I
> can upload the corrected driver for you or you can simply make the below code
> changes to 1.9.5 of e1000e. If you would like me to deliver a patched driver
> for you, please open a bug at SourceForge and let me know which version of
> the driver you're using (plus whether it's the SourceForge or in-kernel
> driver).
>
> Patch (for in e1000_watchdog_task)
> ---
> adapter->gorc - adapter->gotc) / 10000;
> u32 itr = goc> 0 ? (dif * 6000 / goc + 2000) : 8000;
>
> - ew32(ITR, 1000000000 / (itr * 256));
> + if (adapter->msix_entries) {
> + int vector;
> +
> + for (vector = 0; vector< adapter->num_vectors;
> + vector++)
> + writel(1000000000 / (itr * 256),
> + hw->hw_addr + E1000_EITR_82574(vector));
> + } else {
> + ew32(ITR, 1000000000 / (itr * 256));
> + }
> }
>
> /* Cause software interrupt to ensure Rx ring is cleaned */
> ---
>
> Cheers,
> Matthew
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