the bitrig pedro_amd64_pmap branch has been created by pedro. it is 0 commits behind master, and 1 commit ahead.
commit 8d89e4d92961e6e5b123140d42dac9d5ee3b1419 diff: https://github.com/bitrig/bitrig/commit/8d89e4d author: pedro martelletto <[email protected]> date: Tue Aug 19 15:09:29 2014 +0200 pmap improvements for smp diff originally from [email protected] for i386 (back in 2008!), adapted to amd64 and enhanced by [email protected], with minor modifications by yours truly. short description by fritsch@: "Instead of mapping the PTEs of an inactive pmap in the APTE range, and then doing an unconditional remote TLB-flush on all CPUs, we just switch to the other pmap locally. This only causes a local TLB-flush. I have also reordered some stuff so that we will usually send the TLB-shootdown-IPIs first, then do some local stuff, and then wait for the remote TLB-shootdown to finish." effect on bare metal should be noticeable, particularly when forking. on kvm, the difference is brutal: a speedup of nearly 5x. M sys/arch/amd64/amd64/pmap.c M sys/arch/amd64/include/pmap.h
