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Date: Thu, 06 Jan 2005 17:29:34 +0800
From: David Xu <davidxu@freebsd.org>
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To: Petri Helenius <pete@he.iki.fi>
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Subject: Re: higher speed mutexes
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Petri Helenius wrote:
> David Xu wrote:
> 
>> I will have low overhead pthread library available soon, for
>> simple mutex, it is only an atomic_cmpset_long() plus a function
>> call (pthread_mutex_lock) overhead.
>>
> Sounds great. Will this change the performance of rwlocks or is simple 
> mutex preferred for performance sensitive applications?

because we use simple mutex to protect rwlock, if simple mutex is
improved, rwlock should be improved by this side effect.


> Is this something that I could drop on top of RELENG_5 or RELENG_5_3 or 
> is CURRENT required?
> Do you have this in some public depository already?
> 

you can browse my perforce repository, it requires -CURRENT and when
I put it to public, it will need newest -CURRENT kernel. ;-)

http://perforce.freebsd.org/depotTreeBrowser.cgi?FSPC=//depot/projects/davidxu%5fthread/src/lib/libthread/thread
> Pete
> 

David Xu