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Subjectbenchmark anobjrmap with 2.5.65-mm2
From
Anonymous objrmap patches appear to several workloads
a little for uniprocessor K6/2 475 mhz with 2 ide disks
and 384 MB ram.

Build times for autoconf (a fork test), kernel, and perl.

autoconf kernel perl
2.5.65 3845 1641 1348 seconds
2.5.65-mm1 3898 1646 1326
2.5.65-mm2 3895 1582 1312
2.5.65-mm2-anobjrmap 3824 1614 1284

autoconf and perl builds were faster with anon obj rmap.
kernel build was not. kernel build uses pipe more than
autoconf/perl build. Could be the fact there was only
one sample too.

Lmbench pipe latency and bandwidth don't provide an obvious
explanation why kernel build was slower with anobjrmap.

*Local* Communication latencies in microseconds - smaller is better

kernel Pipe
2.5.65 15.36 ms
2.5.65-mm1 15.80
2.5.65-mm2 15.21
2.5.65-mm2-anobjrmap 14.11

*Local* Communication bandwidths in MB/s - bigger is better

kernel Pipe
2.5.65 64.5 MB/second
2.5.65-mm1 63.3
2.5.65-mm2 65.9
2.5.65-mm2-anobjrmap 65.1

I'm running 2.5.65-mm3 now and will watch how kernel build
goes there.

AIM7 workloads were generally a hair faster with anobjrmap.

More benchmarks on recent kernels at:
http://home.earthlink.net/~rwhron/kernel/latest.html

Irman process load starvation still appears in 2.5.65 and
2.5.65-mm[12].

--
Randy Hron
http://home.earthlink.net/~rwhron/kernel/bigbox.html

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