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

On 03/24/11 04:13, Jukka Ruohonen wrote:
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,

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)).

C1E doesn't exist on multi-socket machines.


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