diff options
| 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 /nptl/sysdeps/unix/sysv/linux/s390/bits | |
| 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 'nptl/sysdeps/unix/sysv/linux/s390/bits')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h b/nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h index 8264de0591..d70f8b35b1 100644 --- a/nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h +++ b/nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h @@ -89,14 +89,37 @@ typedef union binary compatibility. */ int __kind; #if __WORDSIZE == 64 +# ifdef ENABLE_LOCK_ELISION + short __spins; + short __elision; + /* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER. */ +# define __PTHREAD_SPINS 0, 0 +# else int __spins; + /* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER. */ +# define __PTHREAD_SPINS 0 +# endif __pthread_list_t __list; # define __PTHREAD_MUTEX_HAVE_PREV 1 #else unsigned int __nusers; __extension__ union { +# ifdef ENABLE_LOCK_ELISION + struct + { + short __espins; + short __elision; + } _d; +# define __spins _d.__espins +# define __elision _d.__elision + /* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER. */ +# define __PTHREAD_SPINS { 0, 0 } +# else int __spins; + /* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER. */ +# define __PTHREAD_SPINS 0 +# endif __pthread_slist_t __list; }; #endif @@ -105,8 +128,6 @@ typedef union long int __align; } pthread_mutex_t; -/* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER. */ -#define __PTHREAD_SPINS 0 typedef union { |