Been trying to do a cross workspace query on Perf data but it does not look at my other workspaces. When doing a query on Heartbeat it works.
This is my Perf query (minus ID's)
I have tried your query and it works fine. What is the exact problem you are trying to solve? Note that it is rare to have CPU that is more than 90% in the 95th percentile (I had to lower it to make sure it works correctly).