From patchwork Mon May 11 23:15:18 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Emmerich X-Patchwork-Id: 4678 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id 70F3D5692; Tue, 12 May 2015 01:15:27 +0200 (CEST) Received: from mail-out1.informatik.tu-muenchen.de (mail-out1.informatik.tu-muenchen.de [131.159.0.8]) by dpdk.org (Postfix) with ESMTP id 8CB622716 for ; Tue, 12 May 2015 01:15:26 +0200 (CEST) Received: from omanyte.baltikum.net.in.tum.de (omanyte.baltikum.net.in.tum.de [188.95.232.221]) by mail.net.in.tum.de (Postfix) with ESMTPSA id 8B53E1944B46; Tue, 12 May 2015 01:15:23 +0200 (CEST) From: Paul Emmerich To: dev@dpdk.org Date: Tue, 12 May 2015 01:15:18 +0200 Message-Id: <1431386118-2811-1-git-send-email-emmericp@net.in.tum.de> X-Mailer: git-send-email 1.9.1 Subject: [dpdk-dev] [PATCH] prefetch second cacheline of mbufs on alloc X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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);