From: "Morten Brørup" <mb@smartsharesystems.com>
To: thomas@monjalon.net, david.marchand@redhat.com,
mattias.ronnblom@ericsson.com, bruce.richardson@intel.com
Cc: olivier.matz@6wind.com, andrew.rybchenko@oktetlabs.ru,
honnappa.nagarahalli@arm.com, konstantin.v.ananyev@yandex.ru,
dev@dpdk.org, "Morten Brørup" <mb@smartsharesystems.com>
Subject: [PATCH] eal: add cache guard to per-lcore PRNG state
Date: Mon, 4 Sep 2023 11:26:32 +0200 [thread overview]
Message-ID: <20230904092632.12675-1-mb@smartsharesystems.com> (raw)
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@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
next reply other threads:[~2023-09-04 9:26 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-04 9:26 Morten Brørup [this message]
2023-09-04 11:57 ` Mattias Rönnblom
2023-09-06 16:25 ` Stephen Hemminger
2023-10-11 16:07 ` Thomas Monjalon
2023-10-11 16:55 ` Morten Brørup
2023-10-11 22:49 ` Thomas Monjalon
2023-10-11 20:41 ` Mattias Rönnblom
2023-09-29 18:55 ` Morten Brørup
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