Re: port-amd64/57266: Poor disk performance on VirtualBox vioscsi0 and NetBSD 10.0_BETA

[Bartek Krawczyk <bbartlomiej.mail%gmail.com@localhost>]

On 12/03/2023 19:10, Bartek Krawczyk wrote:
> The following reply was made to PR port-amd64/57266; it has been noted by GNATS.
>
> From: Bartek Krawczyk <bbartlomiej.mail%gmail.com@localhost>
> To: Robert Elz <kre%munnari.OZ.AU@localhost>
> Cc: gnats-bugs%netbsd.org@localhost, port-amd64-maintainer%netbsd.org@localhost,
>   netbsd-bugs%netbsd.org@localhost
> Subject: Re: port-amd64/57266: Poor disk performance on VirtualBox vioscsi0
>   and NetBSD 10.0_BETA
> Date: Sun, 12 Mar 2023 19:06:31 +0100

>   I tested with only "log" option added to /, and it takes:
>   
>   netbsd# time tar xf pkgsrc.tar.xz
>         1594.28 real         5.69 user      1528.69 sys
>   
>   so 26 minutes.
>   
>   PS. the man page for mount says if both log and async are provided,
>   async is simply disregarded so it shouldn't have impacted my results.
>   
>   Is anybody else running a NetBSD 10.0_BETA VM and can confirm my
>   numbers? Default install, just "log" added on / mount point.

I also created a Rocky 9 VM (RHEL 9) running on the same host (Windows + 
VirtualBox 7.0) with the same virtio-scsi drivers in the hypervisor. 
Default installation:

[bartek@localhost ~]$ uname -a
Linux localhost.localdomain 5.14.0-162.18.1.el9_1.x86_64 #1 SMP 
PREEMPT_DYNAMIC Wed Mar 1 22:02:24 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

[bartek@localhost ~]$ time tar xf pkgsrc.tar.xz

real    0m54.657s
user    0m12.333s
sys     0m34.845s

Also even downloading (virtio net driver) is much faster: 7MB/s vs 
0,5MB/s on NetBSD but that is aprobably again constrained by slow disk I/O.

Another VM on the same host using Windows WSL2 - Debian VM: 10s to 
unpack pkgsrc.tar.zx

--
Regards
Bartek Krawczyk