diff options
| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-11-07 12:25:32 -0500 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2015-01-12 06:30:19 -0500 |
| commit | 8d2c0a593bdefd220be0822fb70de6b8d3bfd39d (patch) | |
| tree | f99ff4ee80aebb75309fad56b244535115d97288 /ChangeLog | |
| parent | ec4fbd48009314515eb31daaff7c25393f29d62b (diff) | |
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powerpc: Add the lock elision using HTM
This patch adds support for lock elision using ISA 2.07 hardware
transactional memory instructions for pthread_mutex primitives.
Similar to s390 version, the for elision logic defined in
'force-elision.h' is only enabled if ENABLE_LOCK_ELISION is defined.
Also, the lock elision code should be able to be built even with
a compiler that does not provide HTM support with builtins.
However I have noted the performance is sub-optimal due scheduling
pressures.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 30 |
1 files changed, 30 insertions, 0 deletions
@@ -1,3 +1,33 @@ +2014-01-12 Adhemerval Zanella <azanella@linux.vnet.ibm.com> + + * sysdeps/unix/sysv/linux/powerpc/Makefile [nptl] + (sysdep_routines): Add lock elision objects. + * sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h + [pthread_mutex_t] (__spins): Rework to add lock elision field. + [pthread_mutex_t] (__elision): Add field. + [__PTHREAD_SPINS]: Adjust to init lock elision field. + * sysdeps/unix/sysv/linux/powerpc/elision-conf.c: New file: lock + elision definitions for powerpc. + * sysdeps/unix/sysv/linux/powerpc/elision-lock.c: New file: + implementation of lock elision for powerpc. + * sysdeps/unix/sysv/linux/powerpc/elision-timed.c: New file: + implementation of timed lock elision for powerpc. + * sysdeps/unix/sysv/linux/powerpc/elision-trylock.c: New file: + implementation of trylock with lock elision for powerpc. + * sysdeps/unix/sysv/linux/powerpc/elision-unlock.c: New file: + implementaion of unlock for lock elision for powerpc. + * sysdeps/unix/sysv/linux/powerpc/force-elision.h: New file: + automatic enable lock elision for mutexes. + * sysdeps/unix/sysv/linux/powerpc/htm.h: New file: hardware + transaction execution definitions for powerpc. + * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: New file: add TLE + definitions. + * sysdeps/unix/sysv/linux/powerpc/pthread_mutex_cond_lock.c: New file. + * sysdeps/unix/sysv/linux/powerpc/pthread_mutex_lock.c: Likewise. + * sysdeps/unix/sysv/linux/powerpc/pthread_mutex_timedlock.c: Likewise. + * sysdeps/unix/sysv/linux/powerpc/pthread_mutex_trylock.c: Likewise. + * NEWS: Update. + 2015-01-09 Roland McGrath <roland@hack.frob.com> * sysdeps/posix/shm-directory.c: Use <> rather than "" |