From: Paul Emmerich <emmericp@net.in.tum.de>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH] prefetch second cacheline of mbufs on alloc
Date: Tue, 12 May 2015 01:15:18 +0200 [thread overview]
Message-ID: <1431386118-2811-1-git-send-email-emmericp@net.in.tum.de> (raw)
this improves the throughput of a simple tx-only application by 11% in
the full-featured ixgbe tx path and by 14% in the simple tx path.
---
lib/librte_mbuf/rte_mbuf.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index ab6de67..f6895b4 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -538,6 +538,7 @@ static inline struct rte_mbuf *__rte_mbuf_raw_alloc(struct rte_mempool *mp)
if (rte_mempool_get(mp, &mb) < 0)
return NULL;
m = (struct rte_mbuf *)mb;
+ rte_prefetch0(&m->cacheline1);
RTE_MBUF_ASSERT(rte_mbuf_refcnt_read(m) == 0);
rte_mbuf_refcnt_set(m, 1);
return (m);
--
1.9.1
next reply other threads:[~2015-05-11 23:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-11 23:15 Paul Emmerich [this message]
2015-07-20 1:00 ` Thomas Monjalon
2015-07-20 8:02 ` Olivier MATZ
2017-02-15 8:44 ` Thomas Monjalon
2017-02-16 15:16 ` Olivier Matz
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