Martin Schwidefsky 2c72a44ecd s390/spinlock: add compare-and-delay to lock wait loops ...

Add the compare-and-delay instruction to the spin-lock and rw-lock
retry loops. A CPU executing the compare-and-delay instruction stops
until the lock value has changed. This is done to make the locking
code for contended locks to behave better in regard to the multi-
hreading facility. A thread of a core executing a compare-and-delay
will allow the other threads of a core to get a larger share of the
core resources.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2015-01-23 15:17:04 +01:00

..

delay.c

s390/idle: consolidate idle functions and definitions

2014-10-09 09:14:03 +02:00

div64.c

s390/comments: unify copyright messages and remove file names

2012-07-20 11:15:04 +02:00

find.c

s390/bitops: fix comment

2014-02-21 08:50:20 +01:00

Makefile

s390/uprobes: common library for kprobes and uprobes

2014-09-25 10:52:14 +02:00

mem32.S

s390/string: provide asm lib functions for memcpy and memcmp

2012-09-26 15:44:50 +02:00

mem64.S

s390/string: provide asm lib functions for memcpy and memcmp

2012-09-26 15:44:50 +02:00

probes.c

s390/uprobes: fix kprobes dependency

2014-10-17 14:45:51 +02:00

qrnnd.S

[S390] fix s390 assembler code alignments

2011-07-24 10:48:21 +02:00

spinlock.c

s390/spinlock: add compare-and-delay to lock wait loops

2015-01-23 15:17:04 +01:00

string.c

s390/string: provide asm lib functions for memcpy and memcmp

2012-09-26 15:44:50 +02:00

uaccess.c

s390/uaccess: simplify control register updates

2014-05-20 08:58:46 +02:00

ucmpdi2.c

[S390] add __ucmpdi2() helper function

2009-07-07 16:37:53 +02:00