Re: [PATCH v2 4/8] genirq: soft_moderation: implement adaptive moderation

[Thomas Gleixner]

On Mon, Nov 17 2025 at 22:34, Luigi Rizzo wrote:
> (First world problem, for sure: I have examples for AMD, Intel, Arm,
> all of them with 100+ CPUs per numa node, and 160-480 CPUs total)
> On some of the above platforms, MSIx interrupts cause heavy serialization
> of all other PCIe requests. As a result, when the total interrupt rate exceeds
> 1-2M intrs/s, I/O throughput degrades by up to 4x and more.

Is it actually the sum of all interrupts in the system or is it
segmented per root port?

Thanks,

        tglx