diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/elision-unlock.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/elision-unlock.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/elision-unlock.c b/sysdeps/unix/sysv/linux/powerpc/elision-unlock.c index f04c339383..43c5a67df2 100644 --- a/sysdeps/unix/sysv/linux/powerpc/elision-unlock.c +++ b/sysdeps/unix/sysv/linux/powerpc/elision-unlock.c @@ -1,5 +1,5 @@ /* elision-unlock.c: Commit an elided pthread lock. - Copyright (C) 2015 Free Software Foundation, Inc. + Copyright (C) 2015-2016 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -21,12 +21,20 @@ #include "htm.h" int -__lll_unlock_elision(int *lock, int pshared) +__lll_unlock_elision (int *lock, short *adapt_count, int pshared) { /* When the lock was free we're in a transaction. */ if (*lock == 0) - __builtin_tend (0); + __libc_tend (0); else - lll_unlock ((*lock), pshared); + { + lll_unlock ((*lock), pshared); + + /* Update the adapt count AFTER completing the critical section. + Doing this here prevents unneeded stalling when entering + a critical section. Saving about 8% runtime on P8. */ + if (*adapt_count > 0) + (*adapt_count)--; + } return 0; } |