[PATCH] eal: add cache guard to per-lcore PRNG state
Morten Brørup
mb at smartsharesystems.com
Mon Sep 4 11:26:32 CEST 2023
The per-lcore random state is frequently updated by their individual
lcores, so add a cache guard to prevent CPU cache thrashing.
Depends-on: series-29415 ("clarify purpose of empty cache lines")
Signed-off-by: Morten Brørup <mb at smartsharesystems.com>
---
lib/eal/common/rte_random.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/eal/common/rte_random.c b/lib/eal/common/rte_random.c
index 565f2401ce..3df0c7004a 100644
--- a/lib/eal/common/rte_random.c
+++ b/lib/eal/common/rte_random.c
@@ -18,6 +18,7 @@ struct rte_rand_state {
uint64_t z3;
uint64_t z4;
uint64_t z5;
+ RTE_CACHE_GUARD;
} __rte_cache_aligned;
/* One instance each for every lcore id-equipped thread, and one
--
2.17.1
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