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{
    "id": 14841,
    "url": "https://patches.dpdk.org/api/patches/14841/?format=api",
    "web_url": "https://patches.dpdk.org/project/dpdk/patch/20160714172719.17502-2-vladyslav.buslov@harmonicinc.com/",
    "project": {
        "id": 1,
        "url": "https://patches.dpdk.org/api/projects/1/?format=api",
        "name": "DPDK",
        "link_name": "dpdk",
        "list_id": "dev.dpdk.org",
        "list_email": "dev@dpdk.org",
        "web_url": "http://core.dpdk.org",
        "scm_url": "git://dpdk.org/dpdk",
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    "msgid": "<20160714172719.17502-2-vladyslav.buslov@harmonicinc.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/20160714172719.17502-2-vladyslav.buslov@harmonicinc.com",
    "date": "2016-07-14T17:27:19",
    "name": "[dpdk-dev] net/i40e: add additional prefetch instructions for bulk rx",
    "commit_ref": null,
    "pull_url": null,
    "state": "changes-requested",
    "archived": true,
    "hash": "5e5ba006cf66df27e8a0b8de33a0dd7a69b0ce01",
    "submitter": {
        "id": 454,
        "url": "https://patches.dpdk.org/api/people/454/?format=api",
        "name": "Vladyslav Buslov",
        "email": "vladyslav.buslov@harmonicinc.com"
    },
    "delegate": {
        "id": 10,
        "url": "https://patches.dpdk.org/api/users/10/?format=api",
        "username": "bruce",
        "first_name": "Bruce",
        "last_name": "Richardson",
        "email": "bruce.richardson@intel.com"
    },
    "mbox": "https://patches.dpdk.org/project/dpdk/patch/20160714172719.17502-2-vladyslav.buslov@harmonicinc.com/mbox/",
    "series": [],
    "comments": "https://patches.dpdk.org/api/patches/14841/comments/",
    "check": "pending",
    "checks": "https://patches.dpdk.org/api/patches/14841/checks/",
    "tags": {},
    "related": [],
    "headers": {
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        "Authentication-Results": "spf=none (sender IP is )\n\tsmtp.mailfrom=Vladyslav.Buslov@harmonicinc.com; ",
        "From": "Vladyslav Buslov <vladyslav.buslov@harmonicinc.com>",
        "To": "<helin.zhang@intel.com>, <jingjing.wu@intel.com>",
        "CC": "<dev@dpdk.org>",
        "Date": "Thu, 14 Jul 2016 20:27:19 +0300",
        "Message-ID": "<20160714172719.17502-2-vladyslav.buslov@harmonicinc.com>",
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        "Subject": "[dpdk-dev] [PATCH] net/i40e: add additional prefetch instructions\n\tfor bulk rx",
        "X-BeenThere": "dev@dpdk.org",
        "X-Mailman-Version": "2.1.15",
        "Precedence": "list",
        "List-Id": "patches and discussions about DPDK <dev.dpdk.org>",
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        "Errors-To": "dev-bounces@dpdk.org",
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    },
    "content": "Added prefetch of first packet payload cacheline in i40e_rx_scan_hw_ring\nAdded prefetch of second mbuf cacheline in i40e_rx_alloc_bufs\n\nSigned-off-by: Vladyslav Buslov <vladyslav.buslov@harmonicinc.com>\n---\n drivers/net/i40e/i40e_rxtx.c | 7 +++++--\n 1 file changed, 5 insertions(+), 2 deletions(-)",
    "diff": "diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c\nindex d3cfb98..e493fb4 100644\n--- a/drivers/net/i40e/i40e_rxtx.c\n+++ b/drivers/net/i40e/i40e_rxtx.c\n@@ -1003,6 +1003,7 @@ i40e_rx_scan_hw_ring(struct i40e_rx_queue *rxq)\n \t\t/* Translate descriptor info to mbuf parameters */\n \t\tfor (j = 0; j < nb_dd; j++) {\n \t\t\tmb = rxep[j].mbuf;\n+\t\t\trte_prefetch0(RTE_PTR_ADD(mb->buf_addr, RTE_PKTMBUF_HEADROOM));\n \t\t\tqword1 = rte_le_to_cpu_64(\\\n \t\t\t\trxdp[j].wb.qword1.status_error_len);\n \t\t\tpkt_len = ((qword1 & I40E_RXD_QW1_LENGTH_PBUF_MASK) >>\n@@ -1086,9 +1087,11 @@ i40e_rx_alloc_bufs(struct i40e_rx_queue *rxq)\n \n \trxdp = &rxq->rx_ring[alloc_idx];\n \tfor (i = 0; i < rxq->rx_free_thresh; i++) {\n-\t\tif (likely(i < (rxq->rx_free_thresh - 1)))\n+\t\tif (likely(i < (rxq->rx_free_thresh - 1))) {\n \t\t\t/* Prefetch next mbuf */\n-\t\t\trte_prefetch0(rxep[i + 1].mbuf);\n+\t\t\trte_prefetch0(&rxep[i + 1].mbuf->cacheline0);\n+\t\t\trte_prefetch0(&rxep[i + 1].mbuf->cacheline1);\n+\t\t}\n \n \t\tmb = rxep[i].mbuf;\n \t\trte_mbuf_refcnt_set(mb, 1);\n",
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