From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerin Jacob Subject: [PATCH v4 2/4] mbuf: fix performance/cache resource issue with 128-byte cache line targets Date: Fri, 29 Jan 2016 13:15:53 +0530 Message-ID: <1454053555-28850-3-git-send-email-jerin.jacob@caviumnetworks.com> References: <1450067576-18803-1-git-send-email-jerin.jacob@caviumnetworks.com> <1454053555-28850-1-git-send-email-jerin.jacob@caviumnetworks.com> Mime-Version: 1.0 Content-Type: text/plain Cc: viktorin@rehivetech.com To: Return-path: Received: from na01-bl2-obe.outbound.protection.outlook.com (mail-bl2on0093.outbound.protection.outlook.com [65.55.169.93]) by dpdk.org (Postfix) with ESMTP id 369E9C5D8 for ; Fri, 29 Jan 2016 08:46:37 +0100 (CET) In-Reply-To: <1454053555-28850-1-git-send-email-jerin.jacob@caviumnetworks.com> 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" No need to split mbuf structure to two cache lines for 128-byte cache line size targets as it can fit on a single 128-byte cache line. Signed-off-by: Jerin Jacob --- app/test/test_mbuf.c | 2 +- lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h | 4 +++- lib/librte_mbuf/rte_mbuf.h | 2 +- 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/app/test/test_mbuf.c b/app/test/test_mbuf.c index b32bef6..c24cbe0 100644 --- a/app/test/test_mbuf.c +++ b/app/test/test_mbuf.c @@ -930,7 +930,7 @@ test_failing_mbuf_sanity_check(void) static int test_mbuf(void) { - RTE_BUILD_BUG_ON(sizeof(struct rte_mbuf) != RTE_CACHE_LINE_SIZE * 2); + RTE_BUILD_BUG_ON(sizeof(struct rte_mbuf) != RTE_CACHE_LINE_MIN_SIZE * 2); /* create pktmbuf pool if it does not exist */ if (pktmbuf_pool == NULL) { diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h index 815abd6..fef914f 100644 --- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h +++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h @@ -68,6 +68,8 @@ */ #define RTE_KNI_NAMESIZE 32 +#define RTE_CACHE_LINE_MIN_SIZE 64 + /* * Request id. */ @@ -118,7 +120,7 @@ struct rte_kni_mbuf { uint16_t data_len; /**< Amount of data in segment buffer. */ /* fields on second cache line */ - char pad3[8] __attribute__((__aligned__(RTE_CACHE_LINE_SIZE))); + char pad3[8] __attribute__((__aligned__(RTE_CACHE_LINE_MIN_SIZE))); void *pool; void *next; }; diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h index f234ac9..c973e9b 100644 --- a/lib/librte_mbuf/rte_mbuf.h +++ b/lib/librte_mbuf/rte_mbuf.h @@ -814,7 +814,7 @@ struct rte_mbuf { uint16_t vlan_tci_outer; /**< Outer VLAN Tag Control Identifier (CPU order) */ /* second cache line - fields only used in slow path or on TX */ - MARKER cacheline1 __rte_cache_aligned; + MARKER cacheline1 __rte_cache_min_aligned; union { void *userdata; /**< Can be used for external metadata */ -- 2.1.0