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| author | Andi Kleen <ak@linux.intel.com> | 2014-03-31 08:07:46 -0700 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2014-06-13 13:15:28 -0700 |
| commit | 8491ed6d70b60e4c75cdcfde10ae759898547b08 (patch) | |
| tree | f26bd7e65ec2a860474297d5c8b87d49193ca4f2 /ChangeLog | |
| parent | a832bdd36203fcb37fa5ad25200ef3c1ae205efe (diff) | |
| download | glibc-8491ed6d70b60e4c75cdcfde10ae759898547b08.tar.gz glibc-8491ed6d70b60e4c75cdcfde10ae759898547b08.tar.xz glibc-8491ed6d70b60e4c75cdcfde10ae759898547b08.zip | |
Add adaptive elision to rwlocks
This patch relies on the C version of the rwlocks posted earlier. With C rwlocks it is very straight forward to do adaptive elision using TSX. It is based on the infrastructure added earlier for mutexes, but uses its own elision macros. The macros are fairly general purpose and could be used for other elision purposes too. This version is much cleaner than the earlier assembler based version, and in particular implements adaptation which makes it safer. I changed the behavior slightly to not require any changes in the test suite and fully conform to all expected behaviors (generally at the cost of not eliding in various situations). In particular this means the timedlock variants are not elided. Nested trylock aborts.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index c2de6f8a05..6e3d2a9a72 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,53 @@ 2014-06-13 Andi Kleen <ak@linux.intel.com> + * nptl/pthread_rwlock_rdlock.c: Include elide.h. + (pthread_rwlock_rdlock): Add elision. + * nptl/pthread_rwlock_wrlock.c: Include elide.h. + (pthread_rwlock_wrlock): Add elision. + * nptl/pthread_rwlock_trywrlock.c: Include elide.h. + (pthread_rwlock_trywrlock): Add elision. + * nptl/pthread_rwlock_tryrdlock.c: Include elide.h. + (pthread_rwlock_tryrdlock): Add elision. + * nptl/pthread_rwlock_unlock.c: Include elide.h. + (pthread_rwlock_tryrdlock): Add elision unlock. + * nptl/sysdeps/pthread/pthread.h: + (__PTHREAD_RWLOCK_ELISION_EXTRA): Handle new define + (PTHREAD_RWLOCK_INITIALIZER, + PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP): + Handle new elision field. + * sysdeps/x86/nptl/elide.h: New file. Add generic elision macros. + * sysdeps/arm/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/sh/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/tile/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/a/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/unix/sysv/linux/aarch64/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/unix/sysv/linux/alpha/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/unix/sysv/linux/hppa/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/unix/sysv/linux/ia64/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/unix/sysv/linux/m68k/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/unix/sysv/linux/microblaze/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/unix/sysv/linux/mips/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/unix/sysv/linux/powerpc/nptl/bits/pthreadtypes.h + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + * sysdeps/unix/sysv/linux/x86/elision-conf.c: + (elision_init): Set try_xbegin to zero when no RTM. + * sysdeps/x86/nptl/bits/pthreadtypes.h + (pthread_rwlock_t): Change __pad1 to __rwelision. + (__PTHREAD_RWLOCK_ELISION_EXTRA): Add. + +2014-06-13 Andi Kleen <ak@linux.intel.com> + * nptl/pthread_rwlock_rdlock (__pthread_rwlock_rdlock): Split into __do_pthread_rwlock_rdlock and __pthread_rwlock_rdlock. * nptl/pthread_rwlock_wrlock (__pthread_rwlock_wrlock): |