Re: kern/56291: XEN3_DOM0 nvme abysmal performance - very slow boot

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Fri, Jul 02, 2021 at 10:53:23AM +0200, Frank Kardel wrote:
> Yes, there seems to be trouble with interrupts overall.
> 
> Even without nvme the system is slow. (I had to boot with -a as the
> 
> root device was not recognized correctly - different issue):
> 
> Interrupts in a non Xen environment are at a rate of ~120. On Xen
> 
> without nvme they are around ~2100.
> 
> Seems that high interrupt rates occur with the bge driver (20 on an idle
> interface (bge0), 800 on
> 
> an enabled interface (bge1))
> 
> The two files contain two sets of statistics 10 seconds apart.

I wonder if the MSIX use is the problem.

Joerg