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Diffstat (limited to 'manual/tunables.texi')
| -rw-r--r-- | manual/tunables.texi | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/manual/tunables.texi b/manual/tunables.texi index 4e68c7ff91..dbfb3308d1 100644 --- a/manual/tunables.texi +++ b/manual/tunables.texi @@ -31,6 +31,7 @@ their own namespace. @menu * Tunable names:: The structure of a tunable name * Memory Allocation Tunables:: Tunables in the memory allocation subsystem +* Dynamic Linking Tunables:: Tunables in the dynamic linking subsystem * Elision Tunables:: Tunables in elision subsystem * POSIX Thread Tunables:: Tunables in the POSIX thread subsystem * Hardware Capability Tunables:: Tunables that modify the hardware @@ -226,6 +227,26 @@ pointer, so add 4 on 32-bit systems or 8 on 64-bit systems to the size passed to @code{malloc} for the largest bin size to enable. @end deftp +@node Dynamic Linking Tunables +@section Dynamic Linking Tunables +@cindex dynamic linking tunables +@cindex rtld tunables + +@deftp {Tunable namespace} glibc.rtld +Dynamic linker behavior can be modified by setting the +following tunables in the @code{rtld} namespace: +@end deftp + +@deftp Tunable glibc.rtld.nns +Sets the number of supported dynamic link namespaces (see @code{dlmopen}). +Currently this limit can be set between 1 and 16 inclusive, the default is 4. +Each link namespace consumes some memory in all thread, and thus raising the +limit will increase the amount of memory each thread uses. Raising the limit +is useful when your application uses more than 4 dynamic linker audit modules +e.g. @env{LD_AUDIT}, or will use more than 4 dynamic link namespaces as created +by @code{dlmopen} with an lmid argument of @code{LM_ID_NEWLM}. +@end deftp + @node Elision Tunables @section Elision Tunables @cindex elision tunables |