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glibc/sysdeps
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Torvald Riegel cc25c8b4c1 New pthread rwlock that is more scalable. 
This replaces the pthread rwlock with a new implementation that uses a
more scalable algorithm (primarily through not using a critical section
anymore to make state changes).  The fast path for rdlock acquisition and
release is now basically a single atomic read-modify write or CAS and a few
branches.  See nptl/pthread_rwlock_common.c for details.

	* nptl/DESIGN-rwlock.txt: Remove.
	* nptl/lowlevelrwlock.sym: Remove.
	* nptl/Makefile: Add new tests.
	* nptl/pthread_rwlock_common.c: New file.  Contains the new rwlock.
	* nptl/pthreadP.h (PTHREAD_RWLOCK_PREFER_READER_P): Remove.
	(PTHREAD_RWLOCK_WRPHASE, PTHREAD_RWLOCK_WRLOCKED,
	PTHREAD_RWLOCK_RWAITING, PTHREAD_RWLOCK_READER_SHIFT,
	PTHREAD_RWLOCK_READER_OVERFLOW, PTHREAD_RWLOCK_WRHANDOVER,
	PTHREAD_RWLOCK_FUTEX_USED): New.
	* nptl/pthread_rwlock_init.c (__pthread_rwlock_init): Adapt to new
	implementation.
	* nptl/pthread_rwlock_rdlock.c (__pthread_rwlock_rdlock_slow): Remove.
	(__pthread_rwlock_rdlock): Adapt.
	* nptl/pthread_rwlock_timedrdlock.c
	(pthread_rwlock_timedrdlock): Adapt.
	* nptl/pthread_rwlock_timedwrlock.c
	(pthread_rwlock_timedwrlock): Adapt.
	* nptl/pthread_rwlock_trywrlock.c (pthread_rwlock_trywrlock): Adapt.
	* nptl/pthread_rwlock_tryrdlock.c (pthread_rwlock_tryrdlock): Adapt.
	* nptl/pthread_rwlock_unlock.c (pthread_rwlock_unlock): Adapt.
	* nptl/pthread_rwlock_wrlock.c (__pthread_rwlock_wrlock_slow): Remove.
	(__pthread_rwlock_wrlock): Adapt.
	* nptl/tst-rwlock10.c: Adapt.
	* nptl/tst-rwlock11.c: Adapt.
	* nptl/tst-rwlock17.c: New file.
	* nptl/tst-rwlock18.c: New file.
	* nptl/tst-rwlock19.c: New file.
	* nptl/tst-rwlock2b.c: New file.
	* nptl/tst-rwlock8.c: Adapt.
	* nptl/tst-rwlock9.c: Adapt.
	* sysdeps/aarch64/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/arm/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/hppa/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/ia64/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/m68k/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/microblaze/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/mips/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/nios2/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/s390/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/sh/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/sparc/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/tile/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h
	(pthread_rwlock_t): Adapt.
	* sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h
	(pthread_rwlock_t): Adapt.
	* sysdeps/x86/bits/pthreadtypes.h (pthread_rwlock_t): Adapt.
	* nptl/nptl-printers.py (): Adapt.
	* nptl/nptl_lock_constants.pysym: Adapt.
	* nptl/test-rwlock-printers.py: Adapt.
	* nptl/test-rwlockattr-printers.c: Adapt.
	* nptl/test-rwlockattr-printers.py: Adapt.
2017-01-10 11:50:17 +01:00
..
aarch64 New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
alpha Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
arm New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
generic Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gnu Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
hppa New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
i386 Move wrappers to libm-compat-calls-auto 2017-01-04 16:25:04 -02:00
ia64 New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
ieee754 Move wrappers to libm-compat-calls-auto 2017-01-04 16:25:04 -02:00
init_array Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
m68k New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
mach Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
microblaze New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
mips New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
nacl Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
nios2 New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
nptl Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
posix Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
powerpc Move wrappers to libm-compat-calls-auto 2017-01-04 16:25:04 -02:00
pthread Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
s390 New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
sh New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
sparc New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
tile New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
unix New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
wordsize-32 Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wordsize-64 Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
x86 New pthread rwlock that is more scalable. 2017-01-10 11:50:17 +01:00
x86_64 Fix x86 strncat optimized implementation for large sizes 2017-01-03 14:24:53 -02:00