What Do the Pretty Colors Mean?
This is a plot of selected internal kernel events during a run of a process that randomly reads/writes its virtual memory.
- x-axis: time in milliseconds (total run is about 3 seconds)
- y-axis: each event pertains to a physical page frame, whose PFN is given on the y-axis
The machine is an Alpha with 8000 8KB pages (64MB total)
The process uses 48MB of virtual memory: force the paging daemon to do FIFO-2C bookkeeping, but little actual paging.
- events: page allocate (yellow-green), page free (red), deactivation (duke blue), reactivation (lime green), page clean (carolina blue).