svn commit: r304436 - in head: . sys/netinet

[Slawa Olhovchenkov]

On Fri, Aug 26, 2016 at 04:55:34PM -0700, Adrian Chadd wrote:

> Hi,
> 
> I use the kernel lock profiling debugging,

I am already have 100% utilise all CPU cores, I think this is drop
performance?

> but you can use dtrace to
> get an idea:
> 
> dtrace -n 'lockstat:::adaptive-block { @[stack()] = sum(arg1); }'

How to interpret results (how to distinct lock contention from lock
cost/overhead (LOCK CMPXCGQ is very expensive))?

> (https://wiki.freebsd.org/DTrace/One-Liners)
> 
> 
> 
> -adrian