Horton

Re: better atomics - v0.6

Andres Freund <andres@2ndquadrant.com>

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From: Andres Freund <andres@2ndquadrant.com>
To: Oskari Saarenmaa <os@ohmu.fi>
Cc: Robert Haas <robertmhaas@gmail.com>, Amit Kapila <amit.kapila16@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Peter Geoghegan <pg@heroku.com>, Pg Hackers <pgsql-hackers@postgresql.org>, Ants Aasma <ants@cybertec.at>
Date: 2014-09-23T12:18:18Z
Lists: pgsql-hackers 
Hi,

On 2014-09-23 13:50:28 +0300, Oskari Saarenmaa wrote:
> 23.09.2014, 00:01, Andres Freund kirjoitti:
> >I've finally managed to incorporate (all the?) feedback I got for
> >0.5. Imo the current version looks pretty good.
> >
> >Most notable changes:
> >* Lots of comment improvements
> >* code moved out of storage/ into port/
> >* separated the s_lock.h changes into its own commit
> >* merged i386/amd64 into one file
> >* fixed lots of the little details Amit noticed
> >* fixed lots of XXX/FIXMEs
> >* rebased to today's master
> >* tested various gcc/msvc versions
> >* extended the regression tests
> >* ...
> >
> >The patches:
> >0001: The actual atomics API
> 
> I tried building PG on Solaris 10/Sparc using GCC 4.9.0 (buildfarm animal
> dingo) with this patch but regression tests failed due to:

Btw, if you could try sun studio it'd be great. I wrote the support for
it blindly, and I'd be surprised if I got it right on the first try.

Greetings,

Andres Freund

-- 
 Andres Freund	                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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