Finishing out the 4.10 merge window

Finishing out the 4.10 merge window

The PA-RISC CPUs (like most other RISCs) have not kept up with Intel and AMD in the MHz race of the late 1990s and early 2000s (before the race hit the wall in 2003-2005), and the fastest one runs at 1100MHz, and has a 6400MB/s memory bus (compared to 19200MB/s for a single DDR4-2400 DIMM, with two accessible in parallel by a desktop Intel CPU), and the IPC (instructions per cycle) are likely also lower than on a current Intel CPU, so the PA-RISC is really much slower than a current Intel or AMD-based system.

But some of us like our old hardware. E.g., we have an Alpha running that we bought in 1998. These systems are not competetive as workhorses, but if you want to do experiments with the architecture or with software running on the architecture, they are the real thing; and if you don't have the real thing, you have nothing to validate a simulator against.