VirtualBox

Ticket #20453 (new defect)

Opened 7 months ago

Last modified 7 months ago

Windows 10 guest on Ubuntu host is extremely slow if cpu > 1

Reported by: Marco Sulla Owned by:
Component: other Version: VirtualBox 6.1.22
Keywords: Cc:
Guest type: Windows Host type: Linux

Description

I upgraded to Virtualbox 6.1, and I noticed a great slowdown on my Windows 10 guest. I tried to play with the settings, and I see that if I put the numbers of cpu to 1, the guest is faster!

So I tried to downgrade to 5.2 and set the number of cores to a number greater of 1. I have no problem at all.

Attachments

VBox.log Download (131.1 KB) - added by Marco Sulla 7 months ago.
6.1 log
VBox.2.log Download (125.6 KB) - added by Marco Sulla 7 months ago.
5.2 log
Vbox.log Download (180.2 KB) - added by Marco Sulla 7 months ago.
6.1 log

Change History

Changed 7 months ago by Marco Sulla

6.1 log

Changed 7 months ago by Marco Sulla

5.2 log

Changed 7 months ago by Marco Sulla

6.1 log

comment:1 Changed 7 months ago by Marco Sulla

Excuse me, I noticed that I've done two errors:

  1. I've not set Hyper-V
  2. I've not set cpu > 1

After this, also 5.2 is slow as 6.1. 5.2 with KVM works. I updated the 6.1 log attachment.

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