Re: NetBSD virtio drivers performance

[Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost>]

On 08.08.2012 16:21, Emmanuel Kasper wrote:
> Hello
> 
> I have a VPS machine hosted by a KVM ( Linux Kernel Virtual Machine )
> hoster in Germany which I am running happily since two years now a
> NetBSD system.
> 
> 
> I stumbled by chance on the fact that NetBSD 6 has virtio drivers ( by
> reading a post ... announcin a gsoc project to port them to
> DragonFlyBSD:
> http://www.google-melange.com/gsoc/proposal/review/google/gsoc2011/stephanie_ouillon),
> so I decided to benchmark the virtio block driver with bonnie++.
> 
> The raw results are here (with BETA_2 binaries )
> 
> http://pastebin.com/ZMgwHp58
> 
> I tryed to concentrate myself on block writing performance, by using
> sync mounts on the host, and I got reprocible results by trunning the
> bonnie++ test three times in a row.
> 
> So short said , with the virtio driver, NetBSD writes at 25MB/s and
> without it only 7MB/s.
> 
> However i noticed the inclusion of this driver was quite confidential
> since I haven't found it in the list of changes:
> http://www.netbsd.org/changes/changes-6.0.html
> Shouldn't it be here as well ?

Yes it should. Thanks for the benchmarks and the notice :)

-- 
Jean-Yves Migeon
jeanyves.migeon%free.fr@localhost