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SubjectBUGed to death
Seems all these bug checks are fairly expensive. I can get 1%
back on system time for kernel compiles by changing BUG to
"do {} while (0)" to make them all compile away. Profiles aren't
very revealing though ... seems to be within experimental error ;-(
I was pondering CONFIG_RUN_WILD_NAKED_AND_FREE, but maybe we can
just nail a few of the hottest path ones instead (I think you did
a couple already recently). I guess that suggestion isn't much
use without more profile data though ;-)

M.

Kernbench: (make -j N vmlinux, where N = 2 x num_cpus)
Elapsed System User CPU
2.5.67-mjb2 43.34 76.24 563.55 1476.25
2.5.67-mjb2-nobug 43.43 75.29 564.12 1471.75

Kernbench: (make -j N vmlinux, where N = 16 x num_cpus)
Elapsed System User CPU
2.5.67-mjb2 43.91 85.05 570.61 1493.50
2.5.67-mjb2-nobug 44.12 84.80 571.10 1485.00

Kernbench: (make -j vmlinux, maximal tasks)
Elapsed System User CPU
2.5.67-mjb2 44.01 85.12 570.10 1488.25
2.5.67-mjb2-nobug 44.03 83.93 570.37 1485.25


DISCLAIMER: SPEC(tm) and the benchmark name SDET(tm) are registered
trademarks of the Standard Performance Evaluation Corporation. This
benchmarking was performed for research purposes only, and the run results
are non-compliant and not-comparable with any published results.

Results are shown as percentages of the first set displayed

SDET 1 (see disclaimer)
Throughput Std. Dev
2.5.67-mjb2 100.0% 1.9%
2.5.67-mjb2-nobug 104.1% 0.0%

SDET 2 (see disclaimer)
Throughput Std. Dev
2.5.67-mjb2 100.0% 1.9%
2.5.67-mjb2-nobug 106.4% 0.0%

SDET 4 (see disclaimer)
Throughput Std. Dev
2.5.67-mjb2 100.0% 3.8%
2.5.67-mjb2-nobug 97.1% 1.3%

SDET 8 (see disclaimer)
Throughput Std. Dev
2.5.67-mjb2 100.0% 0.9%
2.5.67-mjb2-nobug 100.7% 0.7%

SDET 16 (see disclaimer)
Throughput Std. Dev
2.5.67-mjb2 100.0% 1.3%
2.5.67-mjb2-nobug 102.8% 0.7%

SDET 32 (see disclaimer)
Throughput Std. Dev
2.5.67-mjb2 100.0% 0.5%
2.5.67-mjb2-nobug 100.8% 0.5%

SDET 64 (see disclaimer)
Throughput Std. Dev
2.5.67-mjb2 100.0% 0.4%
2.5.67-mjb2-nobug 100.6% 0.3%

SDET 128 (see disclaimer)
Throughput Std. Dev
2.5.67-mjb2 100.0% 0.1%
2.5.67-mjb2-nobug 100.9% 0.2%


RMAPBENCH

rmapbench: 100x100-linear
Elapsed System User CPU
2.5.67-mjb2 44.24 470.00 211.26 1527.67
2.5.67-mjb2-nobug 51.20 579.11 218.33 1533.33

rmapbench: 100x100-random
Elapsed System User CPU
2.5.67-mjb2 2.99 26.50 0.44 895.67
2.5.67-mjb2-nobug 3.03 28.02 0.33 892.00

rmapbench: 1x10000-linear
Elapsed System User CPU
2.5.67-mjb2 2.53 1.32 0.19 59.67
2.5.67-mjb2-nobug 2.37 1.17 0.19 57.00
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