CPU usage is very high. I use Mountain Lion host with Windows 8 RTM guest. Parallels CPU after starting Windows: 60%-70%, and just stay there non-stop Parallels CPU when running any app: 100%+ (up to 400%) Task Manager in Windows: show very low CPU usage (1%-2%). High usage is shown in OSX's Activity Monitor. My machine is extremely hot when running Parallels. RAM should not be an issue because both the host and guest have plenty (10GB and 6GB respectively). Please, help need urgently. Thanks a lot
Hi Abdul, I am running into the same issue. It is completely understood that the method of measurement is different between Windows and MacOS. However, I am noticing that Windows never idles. There is always a 5% utilization being consumed on the total CPU but no application can account for it. Upon further investigation, I noticed that it is the "system interrupts" which is creating the CPU load. This was diagnosed using the SysInternal's Process Explorer. Any suggestions on how to configure the Parallels to allow Windows to truly idle?
Hi justin.lovell, 5% CPU load is normal for the running virtual machine even in idle state. To completely get rid of the load, please quit Parallels Desktop. Thanks, Manoj.
Actually, it is 5% WITHIN Windows. As I explained, the 5% is being consumed by the IRQ's which Parallels is transmitting to Windows (debugged via the SysInternals Process Explorer). I think the pattern I picked up is when I use the trackpad more often.
