Horton

Re: better atomics - v0.2

Marti Raudsepp <marti@juffo.org>

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From: Marti Raudsepp <marti@juffo.org>
To: Andres Freund <andres@2ndquadrant.com>
Cc: Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2014-01-19T19:43:44Z
Lists: pgsql-hackers 
On Tue, Nov 19, 2013 at 6:38 PM, Andres Freund <andres@2ndquadrant.com> wrote:
> The attached patches compile and make check successfully on linux x86,
> amd64 and msvc x86 and amd64. This time and updated configure is
> included. The majority of operations still rely on CAS emulation.

Note that the atomics-generic-acc.h file has ® characters in the
Latin-1 encoding ("Intel ® Itanium ®"). If you have to use weird
characters, I think you should make sure they're UTF-8

Regards,
Marti

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