Re: high sys time, very very slow builds on new 24-core system

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

On Wed, Mar 23, 2011 at 05:24:12PM -0400, Thor Lancelot Simon wrote:
> All cores spend well over 50% time in 'sys', even when all or almost
> all are running cc1 processes.  The kernel is amd64 -current GENERIC
> from about 1 week ago -- no DIAGNOSTIC, DEBUG, KMEMSTATS, LOCKDEBUG,
> etc.
> 
> Does anyone have any idea what might be wrong here?

Another shot in the dark: AMD's so-called C1E is known to cause issues
like this (in which case you might want to enable acpicpu(4)).

- Jukka.