svn commit: r192853 - in head/sys: cddl/contrib/opensolaris/uts/common/dtrace cddl/dev/lockstat conf kern modules/dtrace modules/dtrace/dtraceall sys

Attilio Rao attilio at
Fri May 29 00:19:18 UTC 2009

2009/5/26 Stacey Son <sson at>:
> Author: sson
> Date: Tue May 26 20:28:22 2009
> New Revision: 192853
> URL:
> Log:
>  Add the OpenSolaris dtrace lockstat provider.  The lockstat provider
>  adds probes for mutexes, reader/writer and shared/exclusive locks to
>  gather contention statistics and other locking information for
>  dtrace scripts, the lockstat(1M) command and other potential
>  consumers.

I have a question now.
In rwlocks, your algorithm doesn't bump spin_cnt for the adaptive
spinning in read mode.
Is that intendend? I don't think so, probabilly we should fix it by
bumping spin_cnt also in the adaptive spinning in read mode.


Peace can only be achieved by understanding - A. Einstein

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