Ludger Bolmerg wrote:
> Hi
>
> I installed FreeBSD 6.2 on a Fujitsu Siemens TX600 S3 with 2 dual core
> Xeon processors and 4G RAM.
>
> The SMP kernel is awfully slow. make buildkernel takes about 6 hours to
> complete. When I boot a UP kernel the build completes within 12
> minutes. I don't see any unusual message in any log file.
First, what exactly is slower: CPUs, I/O or something else? Run a CPU
benchmark before/after (ubench is a simple one), and also a disk
benchmark (e.g. bonnie++) before/after and compare. Do you use powerd?
Did you change timecounters? This looks like a Pentium4-type Xeon, did
you try toggling hyperthreading? (also in BIOS?) Does "vmstat -i" output
suggest an interrupt storm?
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