postgresql/src/test
Nathan Bossart 792752af4e Optimize pg_popcount() with AVX-512 instructions.
Presently, pg_popcount() processes data in 32-bit or 64-bit chunks
when possible.  Newer hardware that supports AVX-512 instructions
can use 512-bit chunks, which provides a nice speedup, especially
for larger buffers.  This commit introduces the infrastructure
required to detect compiler and CPU support for the required
AVX-512 intrinsic functions, and it adds a new pg_popcount()
implementation that uses these functions.  If CPU support for this
optimized implementation is detected at runtime, a function pointer
is updated so that it is used by subsequent calls to pg_popcount().

Most of the existing in-tree calls to pg_popcount() should benefit
from these instructions, and calls with smaller buffers should at
least not regress compared to v16.  The new infrastructure
introduced by this commit can also be used to optimize
visibilitymap_count(), but that is left for a follow-up commit.

Co-authored-by: Paul Amonson, Ants Aasma
Reviewed-by: Matthias van de Meent, Tom Lane, Noah Misch, Akash Shankaran, Alvaro Herrera, Andres Freund, David Rowley
Discussion: https://postgr.es/m/BL1PR11MB5304097DF7EA81D04C33F3D1DCA6A%40BL1PR11MB5304.namprd11.prod.outlook.com
2024-04-06 21:56:23 -05:00
..
authentication Update copyright for 2024 2024-01-03 20:49:05 -05:00
examples Update copyright for 2024 2024-01-03 20:49:05 -05:00
icu Address more review comments on commit 2d819a08a1. 2024-03-18 11:58:13 -07:00
isolation Implement ALTER TABLE ... SPLIT PARTITION ... command 2024-04-07 01:18:44 +03:00
kerberos Activate perlcritic InputOutput::RequireCheckedSyscalls and fix resulting warnings 2024-03-19 07:09:31 +01:00
ldap Update copyright for 2024 2024-01-03 20:49:05 -05:00
locale Update copyright for 2024 2024-01-03 20:49:05 -05:00
mb Fix MB regression tests for WAL-logging of hash indexes. 2017-03-15 07:25:36 -04:00
modules Support retrieval of results in chunks with libpq. 2024-04-06 20:45:11 -04:00
perl Backport IPC::Run optimization to src/test/perl. 2024-04-06 09:27:55 -07:00
recovery Allow synced slots to have their inactive_since. 2024-04-05 09:48:49 +05:30
regress Optimize pg_popcount() with AVX-512 instructions. 2024-04-06 21:56:23 -05:00
ssl Revert "Add notBefore and notAfter to SSL cert info display" 2024-03-22 22:58:41 +01:00
subscription Fix the intermittent buildfarm failures in 031_column_list. 2024-02-22 12:06:44 +05:30
Makefile Refactor PG_TEST_EXTRA logic in autoconf build 2022-09-20 11:24:16 -07:00
README Remove the option to build thread_test.c outside configure. 2020-10-21 12:08:48 -04:00
meson.build Update copyright for 2024 2024-01-03 20:49:05 -05:00

README

PostgreSQL tests
================

This directory contains a variety of test infrastructure as well as some of the
tests in PostgreSQL. Not all tests are here -- in particular, there are more in
individual contrib/ modules and in src/bin.

Not all these tests get run by "make check". Check src/test/Makefile to see
which tests get run automatically.

authentication/
  Tests for authentication (but see also below)

examples/
  Demonstration programs for libpq that double as regression tests via
  "make check"

isolation/
  Tests for concurrent behavior at the SQL level

kerberos/
  Tests for Kerberos/GSSAPI authentication and encryption

ldap/
  Tests for LDAP-based authentication

locale/
  Sanity checks for locale data, encodings, etc

mb/
  Tests for multibyte encoding (UTF-8) support

modules/
  Extensions used only or mainly for test purposes, generally not suitable
  for installing in production databases

perl/
  Infrastructure for Perl-based TAP tests

recovery/
  Test suite for recovery and replication

regress/
  PostgreSQL's main regression test suite, pg_regress

ssl/
  Tests to exercise and verify SSL certificate handling

subscription/
  Tests for logical replication