Re: [patch net-next] virtio_net: add support for Byte Queue Limits

Jiri Pirko
2024-05-17T07:52:28Z

Thu, May 16, 2024 at 09:04:41PM CEST, mst@redhat.com wrote:
>On Thu, May 16, 2024 at 05:25:20PM +0200, Jiri Pirko wrote:
>>
>> >I'd expect a regression if any to be in a streaming benchmark.
>>
>> Can you elaborate?
>
>BQL does two things that can hurt throughput:
>- limits amount of data in the queue - can limit bandwidth
> if we now get queue underruns
>- adds CPU overhead - can limit bandwidth if CPU bound
>
>So checking result of a streaming benchmark seems important.

I understand. Didn't see any degradation in TCP_STREAM netperf. But I
will try to extend the testing.

Thanks!

>
>
>--
>MST
>