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Bruce Momjian be58282516 Tom Lane wrote: 
> > For a while I though it might be because we are using an alpha TAS in
> > the spinlock rather than the old semaphore. I replaced our spinlock
> > with the standard one and it made no difference. We have been running
> > with our spinlock implementation for nearly 2 months on a production
> > database now without a hitch, so I think it is ok. Did I ever submit
> > any patches for the Alpha spinlock?
>
> Not that I recall.  We did get some advice from some Alpha gurus at DEC
> who seemed to think the existing TAS code is OK.  What was it that you
> felt needed to be improved?

The current code uses semaphores, which has the advantage that it works
well even on multi-processor machines, but the disadvantage that it is not
the fastest way possible. Writing a spinlock on Alpha for SMP machines is
very difficult, as you need to deal with memory barriers. A real mess. But
then one of the people at Compaq pointed out to us that there is a
ready-made routine on Alpha. We implemented it with the two patches below.
I ran tests with lots of parallel back-ends and got around a 10% speed
increase. I include the two patches. Perhaps some of the other people
running Tru64 can have a look at these as well.

Cheers,

Adriaan Joubert
2000-10-08 04:38:21 +00:00
config Fix configure types.h 2000-10-02 03:58:31 +00:00
contrib Update soundex to new fmgr interface and fix algorithm 2000-10-04 19:25:34 +00:00
doc Remove S-Tree_indexes.html.gz 2000-10-07 22:14:09 +00:00
src Tom Lane wrote: 2000-10-08 04:38:21 +00:00
aclocal.m4 Revise Tcl/Tk configuration. Make missing Tcl after --with-tcl an error, 2000-09-25 22:23:01 +00:00
configure autoconf 2000-10-07 14:57:17 +00:00
configure.in Beos regression patch. 2000-10-07 14:55:16 +00:00
COPYRIGHT Update copyright file. 2000-01-29 08:53:10 +00:00
GNUmakefile.in "installcheck" doesn't need to depend on "all" since we depend on the user 2000-10-02 22:21:21 +00:00
HISTORY Add proofreader's changes to docs. 2000-10-05 19:48:34 +00:00
INSTALL Update installation instructions to new realities. Combined into one file. 2000-07-21 00:44:13 +00:00
Makefile Put back old Makefiles, in pgsql and pgsql/src. 2000-06-12 16:37:22 +00:00
README Brand 7.1 release. Also update jdbc version in release branch. 2000-06-12 22:36:19 +00:00
register.txt Brand 7.1 release. Also update jdbc version in release branch. 2000-06-12 22:36:19 +00:00

README 

 
PostgreSQL Data Base Management System (formerly known as Postgres, then
as Postgres95).
  
This directory contains the development version of 7.1 of the
PostgreSQL database server.  The server is not ANSI SQL compliant, but
it gets closer with every release.  After you unzip and untar the
distribution file, look at file INSTALL for the installation notes and
file HISTORY for the changes.

The latest version of this software may be obtained at
ftp://ftp.postgresql.org/pub/.  For more information look at our WWW
home page located at http://www.postgreSQL.org/.

PostgreSQL is not public domain software.  It is copyrighted by the
University of California but may be used according to the licensing
terms of the the copyright below:

------------------------------------------------------------------------

POSTGRES95 Data Base Management System (formerly known as Postgres, then
as Postgres95).

Copyright (c) 1994-7 Regents of the University of California

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose, without fee, and without a written agreement
is hereby granted, provided that the above copyright notice and this
paragraph and the following two paragraphs appear in all copies.

IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO
PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.