signifanctly slowdown of FreeBSD 8.0-CURRENT/amd64

O. Hartmann ohartman at
Sat May 30 16:23:11 UTC 2009

Attilio Rao wrote:
> 2009/5/30 O. Hartmann <ohartman at>:
>> Hello.
>> I realized a significant slowdown of FreeBSD 8.0-CURRENT/amd64 on every
>> box I run. I have the most recent FreeBSD 8.0-CURRENT/amd64 with custom
>> kernel and switched off every debugging. I see a drastic slowdown
>> whenever heavy I/O on UFS2 and ZFS partitions is performed and whenever
>> some compilation is done (compiling world and kernel). This is horrible
>> on a single core Athlon64 CPU with 2GB RAM as well as on a 4 core Q6600
>> with 8GB and a server with 2 x 4-cores and 16GB RAM.
>> I can not say clearly whether I/O is the bottleneck. Maybe something
>> with the memory subsystem, when it comes to compiler runs, when no disk
>> I/O is done but the box is still horrible slow. This behaviour occured
>> several weeks ago, not being able to specify it more precisely.
>> AQre there any issues at the moment?
> Your kernel is compiled from which date?
> Thanks,
> Attilio
Most recent, say: yesterday! As well as world.

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