Virtual box has become painfully slow (Windows guest on linux host)

[teo8976]

I have a Windows 7 64bit guest on an Ubuntu 14.04 host with VB 4.3.14 on an intel core i7 3632QM (this is a quadcore with 2.2GHz)

Simply moving around a window on the guest is panifully slow.

I used to have the exact same version of windows guest installed from the very same installation CD on VirtualBox 3.x on a FOUR YEAR OLD computer wit Ubuntu 12.x and the guest ran much faster than it does now on the newer hardware with newer VB.

Actually I remember it becoming this slow after some upgrade of VB on the old computer, too.

Something has definitely been screwed up somewhere between 3.x and 4.y that has degraded performance to an unusable slowness.

The host suffers too. Right now while the guest is practically idle and about 2% CPU consumption is reported within the guest, on the host the VirtualBox process is consuming 147% CPU (i.e. a core and a half) and afefcting the host responsiveness.

It's surprising to notice such a degeneration after a couple-of-years newer hardware and VB, with teh exact same guest OS (meaning a clean install of the same installation CD). Something must be badly wrong.

Is there anything I can do to figure out where the bottleneck is?

[teo8976]

F* now I can't even edit my own reprot

[Ramshankar Venkataraman]

Is there any possibility that your Windows 7 thinks it's running under Hyper-V with Microsoft Enlightenments enabled?

Because it is trying to read appears to be the Hyper-V Synthetic Interrupt Controller version. However, I'm not sure if this expected behaviour - but just something that looked odd from the log file.

[Ramshankar Venkataraman]

In any case, if the guest is mostly idle and the host is chewing up CPU cycles like you mention, this sounds like a possible performance regression or the guest is somehow confused ands ends up doing something which it shouldn't normally be doing.

[Frank Mehnert]

No response, closing.