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Re: Scalable RWLock version 3.02 is here...

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Hello,


Don't forget to take a look at my new lightweight EventCount
inside the zip file that supports the following methods:


signal_all()
signal()
wait()
setSignal(): like the setEvent() of the windows event object
resetSignal(): like the setEvent() of the windows event object


I have used my new lightweight EventCount inside my scalable RWLock
called LW_RWLockX. I have also used a Ticket spinlock with a 
"propotional backoff" mechanism inside my new LW_RWLockX algorithm to 
reduce more the cache coherence traffic.


You can download my new scalable RWLock version 3.02 from:

http://pages.videotron.com/aminer/



Thank you,
Amine Moulay Ramdane.


















On 2/20/2014 6:45 PM, aminer wrote:
>
> Hello,
>
>
> Scalable RWLock version 3.02 is here...
>
> I have thought more about my previous LW_RWLockX algorithm, and
> this algorithm had a bug in it, so i had to reinvent a new algorithm
> that uses my new lightweight EventCount, this new LW_RWLockX algorithm
> is scaling very well, and it's starvation-free and it's portable,
> when there is many more writers it will be starvation-free, and this
> is good, hope you will take a look at my new algorithm inside the
> zip file, i have tested this new algorithm extensivly and i can
> tell you that it's stable now.
>
> You will find three variants of my scalable RWLock, one called
> LW_RWLock that is not starvation-free but it's scalable and portable and
> another one called LW_RWLockX that is starvation-free and that is
> scalable and portable, there is also another one that is called RWLock
> that uses less CPU ressources but it's not starvation-free and it's
> scalable and portable.
>
>
> A Read/Write Lock is a performance improvement over a standard mutex for
> cases where reads outnumber writes. with a Read/Write Lock multiple
> simultaneous read locks may be held, but write locks are exclusively held.
>
> The exclusive writing lock ensures that race conditions do not occur,
> since if one client is writing to the data no other client may read or
> write. Also, the allowance for multiple simultaneous read locks
> decreases  resource contention since multiple readers can safely use the
> shared data.  This increases performance over a standard mutex for the
> assumed usage pattern of frequent simultaneous reads and infrequent writes.
>
>
> You can download my new scalable RWLock version 3.02 from:
>
> http://pages.videotron.com/aminer/
>
>
>
> Thank you,
> Amine Moulay Ramdane.
>
>
>
>
>
>
>
>

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Scalable RWLock version 3.02 is here... aminer <aminer@toto.net> - 2014-02-20 18:45 -0800
  Re: Scalable RWLock version 3.02 is here... aminer <aminer@toto.net> - 2014-02-20 19:17 -0800

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