When running `make buildworld`, I see large amounts of sys time; eg, 27 minutes user & 14 minutes sys for building 5.2, or 14 minutes user & 10 minutes sys for building 4.9. I expected the ratio of user:sys to be much larger than this, and mailing list traffic indicates that a 4:1 ratio is typical. (FWIW, prior to changing the debugging options, the user:sys time ratio was around 1:1.)
Can anyone suggest why the kernel seems to be behaving so sluggishly?
The system hardware is P4 2.8Ghz, 865G, 2GB DDR, IDE drives; there is very little disk activity, so I'm sure that isn't the issue; and disabling HTT results in about a 2% improvement in both user and sys times.
Colin Percival
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