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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 |