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| author | Stefan Liebler <stli@linux.vnet.ibm.com> | 2017-01-20 09:53:04 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.vnet.ibm.com> | 2017-01-20 09:53:04 +0100 |
| commit | 03b007771beb4dba3b16d6097a53bfa328a78efb (patch) | |
| tree | 0c3a5e1b2fe7012e55534cbc997426d2aff1d8f6 /ChangeLog | |
| parent | 56009aa33c735d66f19d8382b6ef7c6addc24ec0 (diff) | |
| download | glibc-03b007771beb4dba3b16d6097a53bfa328a78efb.zip glibc-03b007771beb4dba3b16d6097a53bfa328a78efb.tar.gz glibc-03b007771beb4dba3b16d6097a53bfa328a78efb.tar.bz2 | |
S390: Adjust lock elision code after review.
This patch adjusts s390 specific lock elision code after review
of the following patches:
-S390: Use own tbegin macro instead of __builtin_tbegin.
(8bfc4a2ab4bebdf86c151665aae8a266e2f18fb4)
-S390: Use new __libc_tbegin_retry macro in elision-lock.c.
(53c5c3d5ac238901c13f28a73ba05b0678094e80)
-S390: Optimize lock-elision by decrementing adapt_count at unlock.
(dd037fb3df286b7c2d0b0c6f8d02a2dd8a8e8a08)
The futex value is not tested before starting a transaction,
__glibc_likely is used instead of __builtin_expect and comments
are adjusted.
ChangeLog:
* sysdeps/unix/sysv/linux/s390/htm.h: Adjust comments.
* sysdeps/unix/sysv/linux/s390/elision-unlock.c: Likewise.
* sysdeps/unix/sysv/linux/s390/elision-lock.c: Adjust comments.
(__lll_lock_elision): Do not test futex before starting a
transaction. Use __glibc_likely instead of __builtin_expect.
* sysdeps/unix/sysv/linux/s390/elision-trylock.c: Adjust comments.
(__lll_trylock_elision): Do not test futex before starting a
transaction. Use __glibc_likely instead of __builtin_expect.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 11 |
1 files changed, 11 insertions, 0 deletions
@@ -1,3 +1,14 @@ +2017-01-20 Stefan Liebler <stli@linux.vnet.ibm.com> + + * sysdeps/unix/sysv/linux/s390/htm.h: Adjust comments. + * sysdeps/unix/sysv/linux/s390/elision-unlock.c: Likewise. + * sysdeps/unix/sysv/linux/s390/elision-lock.c: Adjust comments. + (__lll_lock_elision): Do not test futex before starting a + transaction. Use __glibc_likely instead of __builtin_expect. + * sysdeps/unix/sysv/linux/s390/elision-trylock.c: Adjust comments. + (__lll_trylock_elision): Do not test futex before starting a + transaction. Use __glibc_likely instead of __builtin_expect. + 2017-01-20 Siddhesh Poyarekar <siddhesh@sourceware.org> * po/Makefile (update-translations): New target. |