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{
    "id": 4219,
    "url": "https://patches.dpdk.org/api/patches/4219/?format=api",
    "web_url": "https://patches.dpdk.org/project/dpdk/patch/1427974230-8572-1-git-send-email-jerry.lilijun@huawei.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",
        "webscm_url": "http://git.dpdk.org/dpdk",
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    "msgid": "<1427974230-8572-1-git-send-email-jerry.lilijun@huawei.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/1427974230-8572-1-git-send-email-jerry.lilijun@huawei.com",
    "date": "2015-04-02T11:30:30",
    "name": "[dpdk-dev] eal: decrease the memory init time with many hugepages setup",
    "commit_ref": null,
    "pull_url": null,
    "state": "changes-requested",
    "archived": true,
    "hash": "aa3b37e6caf848c4a72aef311d2ddeb93a2aae08",
    "submitter": {
        "id": 205,
        "url": "https://patches.dpdk.org/api/people/205/?format=api",
        "name": "Lilijun (Jerry)",
        "email": "jerry.lilijun@huawei.com"
    },
    "delegate": null,
    "mbox": "https://patches.dpdk.org/project/dpdk/patch/1427974230-8572-1-git-send-email-jerry.lilijun@huawei.com/mbox/",
    "series": [],
    "comments": "https://patches.dpdk.org/api/patches/4219/comments/",
    "check": "pending",
    "checks": "https://patches.dpdk.org/api/patches/4219/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<dev-bounces@dpdk.org>",
        "X-Original-To": "patchwork@dpdk.org",
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        "Received": [
            "from [92.243.14.124] (localhost [IPv6:::1])\n\tby dpdk.org (Postfix) with ESMTP id 366F07F1C;\n\tThu,  2 Apr 2015 13:30:57 +0200 (CEST)",
            "from szxga03-in.huawei.com (szxga03-in.huawei.com [119.145.14.66])\n\tby dpdk.org (Postfix) with ESMTP id 42BE67F1C\n\tfor <dev@dpdk.org>; Thu,  2 Apr 2015 13:30:54 +0200 (CEST)",
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            "from localhost (10.177.19.236) by szxeml430-hub.china.huawei.com\n\t(10.82.67.185) with Microsoft SMTP Server id 14.3.158.1;\n\tThu, 2 Apr 2015 19:30:36 +0800"
        ],
        "From": "<jerry.lilijun@huawei.com>",
        "To": "<dev@dpdk.org>",
        "Date": "Thu, 2 Apr 2015 19:30:30 +0800",
        "Message-ID": "<1427974230-8572-1-git-send-email-jerry.lilijun@huawei.com>",
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        "X-Mirapoint-Virus-RAPID-Raw": "score=unknown(0),\n\trefid=str=0001.0A020205.551D2867.00EC, ss=1, re=0.001, recu=0.000,\n\treip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0,\n\tso=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32",
        "X-Mirapoint-Loop-Id": "045011132941f608296dd354be6691c7",
        "Subject": "[dpdk-dev] [PATCH] eal: decrease the memory init time with many\n\thugepages setup",
        "X-BeenThere": "dev@dpdk.org",
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        "List-Id": "patches and discussions about DPDK <dev.dpdk.org>",
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        "Errors-To": "dev-bounces@dpdk.org",
        "Sender": "\"dev\" <dev-bounces@dpdk.org>"
    },
    "content": "From: Lilijun <jerry.lilijun@huawei.com>\n\nIn the function map_all_hugepages(), hugepage memory is truly allocated by\nmemset(virtaddr, 0, hugepage_sz). Then it costs about 40s to finish the\ndpdk memory initialization when 40000 2M hugepages are setup in host os.\nIn fact we can only write one byte to finish  the allocation.\n\nSigned-off-by: Lilijun <jerry.lilijun@huawei.com>\n---\n lib/librte_eal/linuxapp/eal/eal_memory.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)",
    "diff": "diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c\nindex 5f9f92e..8bbee9c 100644\n--- a/lib/librte_eal/linuxapp/eal/eal_memory.c\n+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c\n@@ -378,7 +378,7 @@ map_all_hugepages(struct hugepage_file *hugepg_tbl,\n \n \t\tif (orig) {\n \t\t\thugepg_tbl[i].orig_va = virtaddr;\n-\t\t\tmemset(virtaddr, 0, hugepage_sz);\n+\t\t\tmemset(virtaddr, 0, 1);\n \t\t}\n \t\telse {\n \t\t\thugepg_tbl[i].final_va = virtaddr;\n",
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        "dpdk-dev"
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}