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glibc/sysdeps/nptl
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Stefan Liebler df3a4e104f Add __glibc_unlikely hint in lll_trylock, lll_cond_trylock. 
The macros lll_trylock, lll_cond_trylock are extended by an __glibc_unlikely
hint.  Now the trylock macros are based on the same assumption about a
free/busy lock as lll_lock.
With the hint gcc emits code in e.g. pthread_mutex_trylock which does
not use jumps if the lock is free.  Without the hint it had to jump away
if the lock is free.

Tested on s390x, ppc.

ChangeLog:

	* sysdeps/nptl/lowlevellock.h (lll_trylock, lll_cond_trylock):
	Add __glibc_unlikely hint.
2017-02-06 13:46:01 +01:00
..
sys Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
aio_misc.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
allocrtsig.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fork.c Clear list of acquired robust mutexes in the child process after forking. 2017-01-13 17:17:38 +01:00
fork.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
futex-internal.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gai_misc.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Implies Get rid of nptl/sysdeps/pthread/ subdirectory 2014-06-12 13:48:47 -07:00
internaltypes.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
jmp-unwind.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libc-lock.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libc-lockP.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
librt-cancellation.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
lowlevellock-futex.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
lowlevellock.h Add __glibc_unlikely hint in lll_trylock, lll_cond_trylock. 2017-02-06 13:46:01 +01:00
Makeconfig Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Makefile Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
malloc-machine.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
nptl-signals.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
pthread-functions.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
pthread.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
setxid.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
shm-directory.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sigfillset.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stdio-lock.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Subdirs Get rid of nptl/sysdeps/pthread/ subdirectory 2014-06-12 13:48:47 -07:00
tcb-offsets.h Get rid of nptl/sysdeps/pthread/ subdirectory 2014-06-12 13:48:47 -07:00
tst-mqueue8x.c Get rid of nptl/sysdeps/pthread/ subdirectory 2014-06-12 13:48:47 -07:00
unwind-forcedunwind.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00