Re: Latency spikes on V6.15.1 Preempt RT and maybe related to intel? IGB

[Kurt Kanzenbach]

On Tue Jun 17 2025, Marc Strämke wrote:
> Hi Kurt,
> On 17.06.25 12:54, Kurt Kanzenbach wrote:
>>> You don't have to live with it. You could add a read after the writes in
>>> the loop (wrfl()). This should help.
>> Something like this, which was done for Intel e1000?
>>
>> https://lore.kernel.org/intel-wired-lan/20241219192743.4499-1-gerhard@xxxxxxxxxxxxxxxxxxxxx/
>>
>> Thanks,
>> Kurt
>
> This works wonders (Latency spike down to 120 us from 700) ! I will 
> prepare a patch and submit it to LKML.

Great :-)

Attachment: signature.asc
Description: PGP signature