Re: xennet slow under -current

[Jaromír Doleček <jaromir.dolecek%gmail.com@localhost>]

Le mer. 10 mars 2021 à 16:12, Brian Marcotte <marcotte%panix.com@localhost> a écrit :
>
> >   * Input wasn't great in 9.1, but in -current, it's even slower.
> >
> >     O/S     type    int      out       in (MBits/s)
> >     ------- ----    -----   ----    -----
> >     9.1     PV      xennet  1900      300
> >     current PV      xennet  1960       45
>
> For this problem, it looks like it appeared on April 11, 2020.
>
> A list of the changed files is below. Notably there was a large change
> to if_xennet_xenbus.c by jdolecek

This catched my attention. In my testing, the performance _improved_
with the changes :D

What exactly do you use to test the performance?

In my testing I found there to be a huge performance difference
between the two things I used for measuring, IIRC netcat and netio.

Jaromir