Horton

Re: better atomics - v0.2

Peter Eisentraut <peter_e@gmx.net>

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From: Peter Eisentraut <peter_e@gmx.net>
To: Tom Lane <tgl@sss.pgh.pa.us>, Robert Haas <robertmhaas@gmail.com>
Cc: Andres Freund <andres@2ndquadrant.com>, Peter Geoghegan <pg@heroku.com>, Pg Hackers <pgsql-hackers@postgresql.org>, Ants Aasma <ants@cybertec.at>
Date: 2013-11-19T15:13:33Z
Lists: pgsql-hackers 
On 11/19/13, 9:57 AM, Tom Lane wrote:
> Hm.  Now that I think about it, isn't Peter proposing to break systems
> without working "inline" over here?
> http://www.postgresql.org/message-id/1384257026.8059.5.camel@vanquo.pezone.net

No, that's about const, volatile, #, and memcmp.

I don't have an informed opinion about requiring inline support
(although it would surely be nice).

Commits

  1. Avoid the use of a separate spinlock to protect a LWLock's wait queue.

  2. Improve LWLock scalability.

  3. Reduce the number of semaphores used under --disable-spinlocks.

  4. Alter the configure script to fail immediately if the C compiler does not