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Add support for basic NUMA awareness

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Add basic NUMA awareness routines, using a minimal src/port/pg_numa.c
portability wrapper and an optional build dependency, enabled by
--with-libnuma configure option. For now this is Linux-only, other
platforms may be supported later.

A built-in SQL function pg_numa_available() allows checking NUMA
support, i.e. that the server was built/linked with the NUMA library.

The main function introduced is pg_numa_query_pages(), which allows
determining the NUMA node for individual memory pages. Internally the
function uses move_pages(2) syscall, as it allows batching, and is more
efficient than get_mempolicy(2).

Author: Jakub Wartak <jakub.wartak@enterprisedb.com>
Co-authored-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reviewed-by: Tomas Vondra <tomas@vondra.me>
Discussion: https://postgr.es/m/CAKZiRmxh6KWo0aqRqvmcoaX2jUxZYb4kGp3N%3Dq1w%2BDiH-696Xw%40mail.gmail.com
This commit is contained in:
Tomas Vondra
2025-04-07 22:51:49 +02:00
parent 17bcf4f545
commit 65c298f61f
18 changed files with 444 additions and 3 deletions
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2
src/backend/utils/misc/guc_tables.c
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@ -566,7 +566,7 @@ static int ssl_renegotiation_limit;
*/
int huge_pages = HUGE_PAGES_TRY;
int huge_page_size;
static int huge_pages_status = HUGE_PAGES_UNKNOWN;
int huge_pages_status = HUGE_PAGES_UNKNOWN;
/*
* These variables are all dummies that don't do anything, except in some