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authorDominik Vogt <vogt@linux.vnet.ibm.com>2014-05-09 16:58:46 +0200
committerAndreas Krebbel <krebbel@linux.vnet.ibm.com>2014-05-09 16:58:46 +0200
commit5a414ff70c3a45e52b5f5c0741bd459a84cf56b8 (patch)
tree036ad6a707ea587149cb057f3e41b7bdd086cbdd /configure
parentf63c86fed0ddf38f53de486c5ec537455c00bd52 (diff)
downloadglibc-5a414ff70c3a45e52b5f5c0741bd459a84cf56b8.tar.gz
S/390: Port of lock elision to System/z
Added support for TX lock elision of pthread mutexes on s390 and s390x. This may improve lock scaling of existing programs on TX capable systems. The lock elision code is only built with --enable-lock-elision=yes and then requires a GCC version supporting the TX builtins. With lock elision default mutexes are elided via __builtin_tbegin, if the cpu supports transactions. By default lock elision is not enabled and the elision code is not built.
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure2
1 files changed, 2 insertions, 0 deletions
diff --git a/configure b/configure
index 8b0b22241d..ecc282bd2e 100755
--- a/configure
+++ b/configure
@@ -651,6 +651,7 @@ libc_cv_nss_crypt
all_warnings
force_install
bindnow
+enable_lock_elision
hardcoded_path_in_tests
oldest_abi
use_default_link
@@ -3476,6 +3477,7 @@ else
enable_lock_elision=no
fi
+
if test "$enable_lock_elision" = yes ; then
$as_echo "#define ENABLE_LOCK_ELISION 1" >>confdefs.h