About RCU...

From	Ramine <ramine@1.1>
Newsgroups	comp.programming, comp.programming.threads
Subject	About RCU...
Date	2014-06-14 13:06 -0700
Organization	A noiseless patient Spider
Message-ID	<lni9vl$cis$1@dont-email.me> (permalink)

Cross-posted to 2 groups.

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Chris Thomasson wrote:
 >IMVHO, you do not seem understand why RCU beats a non-asymmetric
 >rw-lock. Besides that, how can you compare RCU with a read-write mutex
 >when RCU allows reads and writes to occur concurrently?

 >Can a write proceed when a read is in progress in any of your rw-mutex
 >algos?

That's not true in general, RCU uses some technics that permit 
parallelism like a write proceed when reads are in progrogress, but
the RCU technic don't apply to the general cases, if you are
writing and reading to multiple memory addresses and they are conflicts,
that means you are writing to many same memory addresses so
RCU will not run a write and reads in parallel...

And i think on read mostly scenarios the difference between RCU and my 
scalable RWLocks are small, cause my scalable RWLocks are scalable on 
read mostly scenarios , they scale even at 3% of writes.

Thank you,
Amine Moulay Ramdane.

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About RCU... Ramine <ramine@1.1> - 2014-06-14 13:06 -0700
  Re: About RCU... Ramine <ramine@1.1> - 2014-06-14 14:28 -0700

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