You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

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		2 years ago
..
Makefile	…
Makefile.cygwin	autoconf: Rely on ar supporting index creation	3 years ago
Makefile.darwin	autoconf: Rely on ar supporting index creation	3 years ago
Makefile.freebsd	autoconf: Move export_dynamic determination to configure	3 years ago
Makefile.linux	autoconf: Move export_dynamic determination to configure	3 years ago
Makefile.netbsd	autoconf: Move export_dynamic determination to configure	3 years ago
Makefile.openbsd	autoconf: Move export_dynamic determination to configure	3 years ago
Makefile.solaris	autoconf: Move export_dynamic determination to configure	3 years ago
Makefile.win32	autoconf: Rely on ar supporting index creation	3 years ago
meson.build	Optimize pg_popcount() with AVX-512 instructions.	2 years ago
pgxs.mk	Remove distprep	2 years ago