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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 |
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| .. | ||
| .gitignore | ||
| bsearch_arg.c | ||
| chklocale.c | ||
| dirent.c | ||
| dirmod.c | ||
| explicit_bzero.c | ||
| getopt.c | ||
| getopt_long.c | ||
| getpeereid.c | ||
| inet_aton.c | ||
| inet_net_ntop.c | ||
| kill.c | ||
| Makefile | ||
| meson.build | ||
| mkdtemp.c | ||
| noblock.c | ||
| open.c | ||
| path.c | ||
| pg_bitutils.c | ||
| pg_crc32c_armv8.c | ||
| pg_crc32c_armv8_choose.c | ||
| pg_crc32c_loongarch.c | ||
| pg_crc32c_sb8.c | ||
| pg_crc32c_sse42.c | ||
| pg_crc32c_sse42_choose.c | ||
| pg_localeconv_r.c | ||
| pg_numa.c | ||
| pg_popcount_aarch64.c | ||
| pg_popcount_avx512.c | ||
| pg_strong_random.c | ||
| pgcheckdir.c | ||
| pgmkdirp.c | ||
| pgsleep.c | ||
| pgstrcasecmp.c | ||
| pgstrsignal.c | ||
| pqsignal.c | ||
| pthread-win32.h | ||
| pthread_barrier_wait.c | ||
| qsort.c | ||
| qsort_arg.c | ||
| quotes.c | ||
| README | ||
| snprintf.c | ||
| strerror.c | ||
| strlcat.c | ||
| strlcpy.c | ||
| strnlen.c | ||
| strsep.c | ||
| strtof.c | ||
| system.c | ||
| tar.c | ||
| timingsafe_bcmp.c | ||
| win32.ico | ||
| win32common.c | ||
| win32dlopen.c | ||
| win32env.c | ||
| win32error.c | ||
| win32fdatasync.c | ||
| win32fseek.c | ||
| win32gai_strerror.c | ||
| win32getrusage.c | ||
| win32gettimeofday.c | ||
| win32link.c | ||
| win32ntdll.c | ||
| win32pread.c | ||
| win32pwrite.c | ||
| win32security.c | ||
| win32setlocale.c | ||
| win32stat.c | ||
| win32ver.rc | ||
src/port/README
libpgport
=========
libpgport must have special behavior. It supplies functions to both
libraries and applications. However, there are two complexities:
1) Libraries need to use object files that are compiled with exactly
the same flags as the library. libpgport might not use the same flags,
so it is necessary to recompile the object files for individual
libraries. This is done by removing -lpgport from the link line:
# Need to recompile any libpgport object files
LIBS := $(filter-out -lpgport, $(LIBS))
and adding infrastructure to recompile the object files:
OBJS= execute.o typename.o descriptor.o data.o error.o prepare.o memory.o \
connect.o misc.o path.o exec.o \
$(filter strlcat.o, $(LIBOBJS))
The problem is that there is no testing of which object files need to be
added, but missing functions usually show up when linking user
applications.
2) For applications, we use -lpgport before -lpq, so the static files
from libpgport are linked first. This avoids having applications
dependent on symbols that are _used_ by libpq, but not intended to be
exported by libpq. libpq's libpgport usage changes over time, so such a
dependency is a problem. Windows, Linux, and macOS use an export
list to control the symbols exported by libpq.