Fine-grained locking for POSIX local sockets (UNIX domain sockets)

[Kris Kennaway]

On Tue, May 09, 2006 at 03:34:59AM +0300, Sven Petai wrote:
> > Hmm, with this patch mysql 4.1 seems to crash at startup.  I haven't
> > yet had time to investigate.  Is anyone else seeing this?
> >
> 
> Seems to run fine here with 4.1.18 on amd64, but doesn't seem to make much 
> difference though.
> 
> I ran the tests again on the 8 core machine with and without rwatsons patch 
> and this time with 6 tests for each setting and generated graphs:
> http://bsd.ee/~hadara/debug/mysql4/stats.html
> 
> thr + select smack dynamics with the patch really do look quite interesting
> 
> PS
> I'm currently running testround with rwatsons patch + 
> http://people.freebsd.org/~csjp/kern_descrip.c.1145074052.diff  + mysqld 
> change davidxu suggested. 
> Are there any other patches out there that I should try ?

Sorry, I meant
http://people.freebsd.org/~csjp/sys.mpsafe.fileops.1145896495.diff
instead of that patch.  Also try turning down HZ to 100, and changing
the wakeup()s to wakeup_one() in sys/filedesc.h.

A mutex profiling trace from the 8 core machine will also be very
interesting.

Kris
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