ld.hugetlbfs (1) - Linux Manuals

ld.hugetlbfs: link a program for huge pages

NAME

ld.hugetlbfs - link a program for huge pages

SYNOPSIS

ld.hugetlbfs [options]

DESCRIPTION

ld.hugetlbfs replaces the normal ld command for linking programs to use hugepages. Under gcc, you should use the option -B /usr/share/libhugetlbfs which tells gcc to look in a non-standard location for the linker. This could be set in the CFLAGS environment variable.

-Wl,--hugetlbfs-align

This method of linking an application permits greater flexibility at runtime. Using HUGETLB_ELFMAP, it is possible to control which program segments are placed in hugepages. The following four settings will cause the indicated segments to be placed in hugepages:

  HUGETLB_ELFMAP=R        Read-only segments (text)
  HUGETLB_ELFMAP=W        Writable segments (data/BSS)
  HUGETLB_ELFMAP=RW       All segments (text/data/BSS)
  HUGETLB_ELFMAP=no       No segments

It is possible to select specific huge page sizes for read-only and writable segments by using the following advanced syntax:

  HUGETLB_ELFMAP=[R[=<pagesize>]:[W[=<pagesize>]]

-Wl,--hugetlbfs-link=B

Under binutils 2.16 or older, this option will link the application to store BSS data (only) into hugepages.

-Wl,--hugetlbfs-link=BDT

Under binutils 2.16 or older, this option will link the application to store text, initialized data and BSS data into hugepages.

FILES

[DESTDIR|/usr/share]/doc/libhugetlbfs/HOWTO

AUTHORS

libhugetlbfs was written by various people on the libhugetlbfs-devel mailing list.