I had some excessive CPU usage (30% on a 4-core system) inside
WheaAttemptPhysicalPageOffline when using an Intel HD graphics 2500 GPU.
At first I thought I needed to convince IT to update the drivers: Intel HD graphics causing high CPU utilization | Intel Communities.
Then I closed all Visual Studio 2013 instances and the CPU usage went to normal.
So I’m suspecting a WPF issue somewhere.