High Parallels CPU Usage

Parallels seems to have gone down in efficiency with the release of PD8. When Windows is using about 20% CPU usage overall, the actual Parallels host in OS X can easily be using between 100 and 200%. Any reason why there's so much overhead...?

Currently, my total Windows CPU usage is hovering around 20%, but Parallels is at 150%.

 

Please generate a problem report ("Help > Report a Problem") when CPU usage is high and post its ID here.

 

I will try to get one when I see this happening.

FYI, I *believe* it's something to do with the graphics driver. When the CPU has been high, it's when I've been running Office 2013, and the Desktop Window Manager is also increasing in CPU, implying it's got something to do with how Office renders its UI. I've had to disable Hardware Acceleration in Office, as it's corrupting the display.

 

I have the same issue...here's my "Report a Problem" ID: 18815986

 

Resolved High CPU Issue

I ended up just uninstalling and reinstalling Parallels 8. That seemed to resolve my high CPU issues.

 

Reinstalling didn't fix it. I'm STILL seeing VERY high CPU usage. I seriously think it's something to do with the Graphics Driver, as one time, I closed Office, but the Desktop Window Manager was still using 50% CPU.

Parallels - are you looking into this?!

 

Is there any feedback from Parallels on this issue? I'm still seeing VERY high CPU usage for Office 2013 apps, and if I enable Hardware Acceleration, I get graphical corruption

 

koppah,

Are you running the latest Parallels Desktop build 8.0.18314? If so, generate a Problem Report when you see the corruption and post report ID here.

 

So, I nuked the VM and started from scratch. Things seem much, much better now.

 

Same issue here. Started happening after updating to the newest build 8.0.18314.
Not running anything in Windows, with Windows reporting low CPU usage.
My host OSX, however, shows that Parallels is constantly consuming at least 20%.
Battery life has gone down. Please help.
Support request ID is 19707857.

 

I'm also seeing constant 20% CPU usage now, but no longer high CPU usage from running Office 2013.

 

I have been seeing the same behaviour. Parallels 8 running Win8 with Office 2013 on a 15" MBPr with 16 GB RAM.

 

Ditto. WinXP on MacBook Pro with 8 Gb RAM. VM is on an SSD. Problem Report 20287777.

 

Same here, Windows 8 VM can be idle, but Parallels VM process on OSX easily approaches 200% CPU usage with fans running at full speed. Problem ID 20317647

 

Believe it or not, my problem was solved with a Repair Disk Permissions in OSX.

 

Same issue! Number: 22073669

 

I have the same problem since upgraded to PD8. This is a continuous, as opposed to sporadic, problem. Right now, my Windows 7 VM is telling me Windows is using 0-1% CPU, while PD8 is using 52% of my MBP CPU.

Problem ID 22530885.

 

20-30% on MBP 2012

Same here, Parallels hovers at 20%, at times higher, while Windows apps are either closed or idle. Win 7 Ultimate.

 

Hi,

I have the same exact problem:

- Seven Ultimate x64 + Parallels Desktop 8.0.18608
(Rev 898384; Wed, 17 Jul 2013)...can anybody help me out?


Kind regards

ID 31047757

 

Could you post a screenshot of guest Windows with Task Manager's "Processes" tab (sorted by CPU usage), please?