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2000-07-27  Jes Sorensen  <jes@linuxcare.com>

	* linuxthreads/sysdeps/ia64/pspinlock.c (__pthread_spin_lock): Add
	load of spin lock to prime the cache before the atomic compare and
	exchange operation (cmpxchg4). This avoids the spinning on the
	cmpxchg4 instruction and reduces movement of the cache line back
	and forth between the processors (explanation by Asis K. Mallick
	from Intel). This basically makes the implementation operate the
	same as the Linux kernel implementation.

	* linuxthreads/shlib-versions: Use GLIBC_2_2 for Linux/ia64.
	* linuxthreads/sysdeps/ia64/pspinlock.c: New file.
This commit is contained in:
Ulrich Drepper 2000-08-03 17:59:17 +00:00
parent 139a4d957a
commit 0d01973496
1 changed files with 13 additions and 0 deletions
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@ -1,3 +1,16 @@
2000-07-27 Jes Sorensen <jes@linuxcare.com>
* linuxthreads/sysdeps/ia64/pspinlock.c (__pthread_spin_lock): Add
load of spin lock to prime the cache before the atomic compare and
exchange operation (cmpxchg4). This avoids the spinning on the
cmpxchg4 instruction and reduces movement of the cache line back
and forth between the processors (explanation by Asis K. Mallick
from Intel). This basically makes the implementation operate the
same as the Linux kernel implementation.
* linuxthreads/shlib-versions: Use GLIBC_2_2 for Linux/ia64.
* linuxthreads/sysdeps/ia64/pspinlock.c: New file.
2000-08-03 Ulrich Drepper <drepper@redhat.com>
* pthread.c: Move definition of __pthread_set_own_extricate_if...