>    plain -current:
>    
>    	256.8u 92.5s 2:56.98 197.4% 0+0k 0+7755io 0pf+0w
>    	256.0u 93.6s 2:56.94 197.6% 0+0k 0+7751io 0pf+0w
>    
>    old amd64/pmap.c with -current:
>    
>    	241.7u 77.5s 2:41.72 197.4% 0+0k 0+7742io 0pf+0w
>    	242.7u 76.4s 2:41.71 197.4% 0+0k 0+7747io 0pf+0w
>    
>    1 month old kernel:
>    
>    	241.3u 73.2s 2:41.65 194.5% 0+0k 33+7748io 125pf+0w
>    	242.1u 72.6s 2:39.51 197.3% 0+0k 0+7745io 0pf+0w

i failed to reproduce.  can you give me more details?

there are numbers on my box with "make -j8", 2 cpus, 1GB memory, nfsroot.
(they are not so accurate as neither of network or nfs server are dedicated.)

yamt-x86pmap-base4:

      710.60 real      1028.22 user       293.31 sys
      709.59 real      1026.05 user       295.84 sys
      703.27 real      1027.03 user       295.14 sys
      703.41 real      1022.86 user       298.32 sys
      709.80 real      1024.91 user       297.41 sys

yamt-x86pmap:

      697.50 real      1020.46 user       268.97 sys
      693.40 real      1017.57 user       272.21 sys
      695.62 real      1017.89 user       271.50 sys
      693.17 real      1020.76 user       270.97 sys
      690.34 real      1019.43 user       271.93 sys

YAMAMOTO Takashi