This post points to two files, PARA, my kernel configuration file, and loader.conf which sets the kernel’s HZ back to 100. The default hz in FreeBSD CURRENT (will be 7.0) is now 1000 which is too high for Parallels to keep up with and causes it to eat about 15% of the CPU on my MacBook. With HZ set to 100 an idle virtual machine uses only 5% of the CPU, which is less than OSX’s windowserver process.

PARA

loader.conf

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