2 x quad-core system is slower that 2 x dual core on FreeBSD

Ivan Voras ivoras at freebsd.org
Mon Nov 19 10:45:19 PST 2007

Kris Kennaway wrote:

> My guess is that you're hitting contention in the TCP send path, but I
> missed the start of this conversation so I don't know what problems you
> are seeing.

Here it is:

there's some mutex profiling there.

Offtopic: How to you read output from debug.mutex.prof.stats? Is
cnt_lock the number of times a lock has been attempted to be acquired
but it wasn't available?

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