Window7 takin high CPU MAC side but almost idling on Windows Task manager

M

maurpra

Bit poster
Hi,
I'm running on a MAC OS 10.10 Parallels Desktop 10.1.1 (28614). Running Windows 7 Professional.
Since I upgraded the MAC side to Yosemite, the MAC Resource manager is showing constant quite high CPU usage from Windows 7 process (Virtual Machine) but if I open Windows task manager, it shows 85 to 90% CPU time in idling.
In other words Windows is doing nothing but the virtual machine is consuming high CPU Mac side.
This behavior not was noticeable prior upgrading to Yosemite (And I had already Parallel 10).
Tried to re-install PArallel Tools but nothing changed.

When launching Windows apps I have to say that the machine seems slower.
 
Hi,
before posting I already saw those two posts into the Knowledge base but I have neither of the problem. The process that is taking all that MAC cpu time is the virtual machine itself named "Windows7" and not those other processes listed there.
If I open the Windows task manager I can see that the CPU is 80-90% on the idle process (i.e. Windows is doing nothing as expected). If I launch Windows applications they run just fine and are not delayed in a visible way. It sounds that is a Parallel process (not those listed in the Knowledge base) is taking Mac cpu only.
 
Ok I've exectuted step by step 116263 and didn't solved. Than I tried 122767 and yes the problem is
com.apple.driver.AppleACPIPlatform interrupt storm. The suggested sudo workaround fixed the problem even if I do not understand which is the relation with such driver.
Is this a Parallel 10 compatibility issue with OS X 10.10 or...??? I assume yes because stopping the Virtual Machine the CPU over usage goes back to zero.
 
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