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| author | Dominik Vogt <vogt@linux.vnet.ibm.com> | 2014-05-09 16:58:46 +0200 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2014-05-09 16:58:46 +0200 |
| commit | 5a414ff70c3a45e52b5f5c0741bd459a84cf56b8 (patch) | |
| tree | 036ad6a707ea587149cb057f3e41b7bdd086cbdd /NEWS | |
| parent | f63c86fed0ddf38f53de486c5ec537455c00bd52 (diff) | |
| download | glibc-5a414ff70c3a45e52b5f5c0741bd459a84cf56b8.tar.gz glibc-5a414ff70c3a45e52b5f5c0741bd459a84cf56b8.tar.xz glibc-5a414ff70c3a45e52b5f5c0741bd459a84cf56b8.zip | |
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 'NEWS')
| -rw-r--r-- | NEWS | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/NEWS b/NEWS index 40068712dc..fae2b82607 100644 --- a/NEWS +++ b/NEWS @@ -40,6 +40,14 @@ Version 2.20 test macros defined. * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd. + +* 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. Version 2.19 |