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[Bug nptl/19174] PowerPC: TLE enabled pthread mutex performs poorly.
- From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 17 Dec 2015 17:19:31 +0000
- Subject: [Bug nptl/19174] PowerPC: TLE enabled pthread mutex performs poorly.
- Auto-submitted: auto-generated
- References: <bug-19174-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=19174
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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cd51b1424477652cccdb83e7a95644d198fd4513
commit cd51b1424477652cccdb83e7a95644d198fd4513
Author: Paul Murphy <murphyp@linux.vnet.ibm.com>
Date: Thu Aug 27 09:48:04 2015 -0500
powerpc: Fix usage of elision transient failure adapt param
The skip_lock_out_of_tbegin_retries adaptive parameter was
not being used correctly, nor as described. This prevents
a fallback for all users of the lock if a transient abort
occurs within the accepted number of retries.
[BZ #19174]
* sysdeps/powerpc/nptl/elide.h (__elide_lock): Fix usage of
.skip_lock_out_of_tbegin_retries.
* sysdeps/unix/sysv/linux/powerpc/elision-lock.c
(__lll_lock_elision): Likewise, and respect a value of
try_tbegin <= 0.
(cherry picked from commit 72f1463df85a522bfd1568e47bd81371522ee358)
Conflicts:
NEWS
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 9 +++++++++
NEWS | 2 +-
sysdeps/powerpc/nptl/elide.h | 6 +++---
sysdeps/unix/sysv/linux/powerpc/elision-lock.c | 15 ++++++---------
4 files changed, 19 insertions(+), 13 deletions(-)
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