[vbox-dev] New event queue

Andreas Löffler andreas.loeffler at oracle.com
Mon Oct 7 14:58:24 UTC 2013


It does not make running the VM faster as such, so don't expect any
performance boosts with this change. However, there can be some 
situations which might exceed the OS-dependent entries-per-queue limit.

To more decouple processing own VBox events from the application's 
native event queue this new implementation was introduced.


On 07.10.2013 16:42, Alexey Eromenko wrote:
> Why is this important? For running more VMs simultaneously or running
> one VM faster?
>
> On Oct 7, 2013 4:27 PM, "Andreas Löffler" <andreas.loeffler at oracle.com
> <mailto:andreas.loeffler at oracle.com>> wrote:
>
>     Hi,
>
>     on some OSes (like Windows) the application's main event queue is
>     limited to hold up to a certain amount of events at once by default.
>
>     With the new event queue it's now possible to store (and thus
>     process) more events without the limitation mentioned above. And:
>     No, it shouldn't have any downsides really :-).
>
>     Hope this helps,
>     Andreas
>
>
>     On 07.10.2013 15:48, Alexey Eromenko wrote:
>
>           From 4.3 BETA changelog:
>         • Main: new event queue implementation which does not use the host’s
>         native event queue for processing VirtualBox events anymore
>
>         ... why is this important and what are the effects ? Any downsides ?
>
>
>     --
>     Kind regards / Mit freundlichen Grüßen
>
>     ******************************__******************************__******
>     Andreas Löffler          | VirtualBox Engineering
>     Senior Software Engineer | Oracle Virtualization
>
>     ORACLE Deutschland B.V. & Co. KG
>     Werkstrasse 24
>     D-71384 Weinstadt, Germany
>
>     Hauptverwaltung: Riesstr. 25, D-80992 München
>     Registergericht: Amtsgericht München, HRA 95603
>     Geschäftsführer: Jürgen Kunz
>
>     Komplementärin: ORACLE Deutschland Verwaltung B.V.
>     Hertogswetering 163/167, 3543 AS Utrecht, Niederlande
>     Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697
>     Geschäftsführer: Alexander van der Ven, Astrid Kepper, Val Maher
>
>     Green Oracle <http://www.oracle.com/__commitment
>     <http://www.oracle.com/commitment>>
>     Oracle is committed to developing practices and products that
>     help protect the environment
>
>
>
> _______________________________________________
> vbox-dev mailing list
> vbox-dev at virtualbox.org
> https://www.virtualbox.org/mailman/listinfo/vbox-dev
>

-- 
Kind regards / Mit freundlichen Grüßen

******************************************************************
Andreas Löffler          | VirtualBox Engineering
Senior Software Engineer | Oracle Virtualization

ORACLE Deutschland B.V. & Co. KG
Werkstrasse 24
D-71384 Weinstadt, Germany

Hauptverwaltung: Riesstr. 25, D-80992 München
Registergericht: Amtsgericht München, HRA 95603
Geschäftsführer: Jürgen Kunz

Komplementärin: ORACLE Deutschland Verwaltung B.V.
Hertogswetering 163/167, 3543 AS Utrecht, Niederlande
Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697
Geschäftsführer: Alexander van der Ven, Astrid Kepper, Val Maher

Green Oracle <http://www.oracle.com/commitment>
Oracle is committed to developing practices and products that
help protect the environment



More information about the vbox-dev mailing list