A bit late, but some more data points.....
90MHz Pentium, FreeBSD 2.2.7
mode 0 60.80 ns/loop nproc=1 lcks=EMPTY
mode 1 91.13 ns/loop nproc=1 lcks=no
mode 2 91.11 ns/loop nproc=2 lcks=no
mode 3 242.59 ns/loop nproc=1 lcks=yes
mode 4 242.69 ns/loop nproc=2 lcks=yes
mode 5 586.27 ns/loop nproc=1 lcks=no
mode 6 586.91 ns/loop nproc=2 lcks=no
mode 7 749.28 ns/loop nproc=1 lcks=yes
mode 8 746.70 ns/loop nproc=2 lcks=yes
mode 9 181.96 ns/loop nproc=1 lcks=EMPTY
mode 10 242.56 ns/loop nproc=1 lcks=no
mode 11 242.69 ns/loop nproc=2 lcks=no
mode 12 343.80 ns/loop nproc=1 lcks=yes
mode 13 343.77 ns/loop nproc=2 lcks=yes
mode 14 727.79 ns/loop nproc=1 lcks=no
mode 15 729.95 ns/loop nproc=2 lcks=no
mode 16 850.10 ns/loop nproc=1 lcks=yes
mode 17 848.02 ns/loop nproc=2 lcks=yes
200MHz Pentium Pro, -current, same binary as above;
mode 0 42.76 ns/loop nproc=1 lcks=EMPTY
mode 1 32.01 ns/loop nproc=1 lcks=no
mode 2 33.30 ns/loop nproc=2 lcks=no
mode 3 191.30 ns/loop nproc=1 lcks=yes
mode 4 191.62 ns/loop nproc=2 lcks=yes
mode 5 93.12 ns/loop nproc=1 lcks=no
mode 6 94.54 ns/loop nproc=2 lcks=no
mode 7 195.16 ns/loop nproc=1 lcks=yes
mode 8 200.91 ns/loop nproc=2 lcks=yes
mode 9 65.83 ns/loop nproc=1 lcks=EMPTY
mode 10 90.32 ns/loop nproc=1 lcks=no
mode 11 90.33 ns/loop nproc=2 lcks=no
mode 12 236.61 ns/loop nproc=1 lcks=yes
mode 13 236.70 ns/loop nproc=2 lcks=yes
mode 14 120.83 ns/loop nproc=1 lcks=no
mode 15 122.12 ns/loop nproc=2 lcks=no
mode 16 276.92 ns/loop nproc=1 lcks=yes
mode 17 277.19 ns/loop nproc=2 lcks=yes
200MHz pentium Pro, -current, compiled with -current compiler
mode 0 35.30 ns/loop nproc=1 lcks=EMPTY
mode 1 22.13 ns/loop nproc=1 lcks=no
mode 2 22.31 ns/loop nproc=2 lcks=no
mode 3 186.26 ns/loop nproc=1 lcks=yes
mode 4 186.39 ns/loop nproc=2 lcks=yes
mode 5 75.61 ns/loop nproc=1 lcks=no
mode 6 78.52 ns/loop nproc=2 lcks=no
mode 7 191.46 ns/loop nproc=1 lcks=yes
mode 8 191.65 ns/loop nproc=2 lcks=yes
mode 9 69.34 ns/loop nproc=1 lcks=EMPTY
mode 10 86.68 ns/loop nproc=1 lcks=no
mode 11 86.49 ns/loop nproc=2 lcks=no
mode 12 237.49 ns/loop nproc=1 lcks=yes
mode 13 236.67 ns/loop nproc=2 lcks=yes
mode 14 134.96 ns/loop nproc=1 lcks=no
mode 15 134.99 ns/loop nproc=2 lcks=no
mode 16 276.90 ns/loop nproc=1 lcks=yes
mode 17 277.33 ns/loop nproc=2 lcks=yes
Not exactly sure what all this means but whatever mode1 17 is, it can
sure be expensive..
of course this is a UP machine...
julian
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