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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-04-19 14:54:05 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-07-26 08:25:23 +0200 |
| commit | 7f7e6e28cd3285ce5d5a3d88b334eda428dd7d66 (patch) | |
| tree | 4d9a8c81ee58e2b965f68322e66e894a6522f44a /tools/perf/scripts/python/syscall-counts.py | |
| parent | 8351378f5873164ecc966c58fac43bab53216c94 (diff) | |
s390/spinlock: add niai spinlock hints
The z14 machine introduces new mode of the next-instruction-access-intent
NIAI instruction. With NIAI-8 it is possible to pin a cache-line on a
CPU for a small amount of time, NIAI-7 releases the cache-line again.
Finally NIAI-4 can be used to prevent the CPU to speculatively access
memory beyond the compare-and-swap instruction to get the lock.
Use these instruction in the spinlock code.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions