Opened 6 years ago

Closed 2 years ago

#9707 closed bug (invalid)

Vitualbox: slow down when using more than 1 processor (AMD)

Reported by: dzaragoza Owned by: nobody
Priority: normal Milestone: R1
Component: System/Kernel Version: R1/alpha4.1
Keywords: Cc:
Blocked By: Blocking:
Has a Patch: no Platform: All

Description

Hello

Haiku slows down when assigning more than 1 processor to the virtual machine. I tested with an AMD Phenom II processor assigning from 2 to 4 processor, getting the same slow down. I don't have an Intel processor to test on.

When running with only 1 processor everything is ok. Everything returns to normal speed when I reduce the number of processors assigned to the virtual machine or when I disable the extra processors in the deskbar.

I also tested running Haiku in the bare hardware and using the 4 cores of the cpu does not trigger the slow down, only when using Virtualbox.

Versions used: Virtualbox 4.2.12 on Windows 8. Haiku R1/Alpha4.1

Regards

Change History (4)

comment:1 Changed 5 years ago by diver

Component: - GeneralSystem/Kernel
Owner: changed from nobody to axeld

Could have been fixed with scheduler rework.

comment:2 Changed 2 years ago by axeld

Owner: changed from axeld to nobody
Status: newassigned

comment:3 Changed 2 years ago by AGMS

I suspect that's a VirtualBox thing. Guest Linux (Fedora 25) slows down too (or at least the GUI feels sluggish when running with more than 1 virtual CPU).

comment:4 Changed 2 years ago by axeld

Resolution: invalid
Status: assignedclosed

Yep, I guess that's true; I've switched all my VirtualBox VMs to one CPU because of that. Until proven otherwise, I'm keeping this ticket closed.

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