Hello, On Mon, Jan 12, 2009 at 3:25 PM, Peter Teoh <[email protected]> wrote: > An incredible good technical article: > > http://lwn.net/Articles/305782/ > > May be someone would like to summarize it in 3 or 4 sentences? > Uhh, impossible. My lousy attempt, I have CC: Paul as the designer and author:
Read-copy update (RCU) is a novel synchronization mechanism added to the Linux kernel that allows readers to execute concurrently with writers. The classic RCU mechanism scales well up to systems with hundreds of processors, but does not scale well to emerging larger multi-core systems as there is a global lock involved that must be acquired by each CPU. Also, CPUs are woken up regularly, even if they sit idle. A new hierarchical implementation of RCU reduces lock contention and avoids unnecessarily awakening sleeping CPUs. Design by Paul McKenney. Regards, -- Leon Woestenberg -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
