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[
    {
        "id": 1003,
        "web_url": "https://patches.dpdk.org/comment/1003/",
        "msgid": "<2175678.VihOFB42XY@xps13>",
        "date": "2014-09-25T09:02:04",
        "subject": "Re: [dpdk-dev] [memnic PATCH 1/7] guest: memnic-tester: PMD\n\tbenchmark in guest",
        "submitter": {
            "id": 1,
            "url": "https://patches.dpdk.org/api/people/1/",
            "name": "Thomas Monjalon",
            "email": "thomas.monjalon@6wind.com"
        },
        "content": "> > >  master |<- put packets ->|     |<- get packets ->|\n> > >  slave  |   |<- rx packets ->|<- tx packets ->|   |\n> > >         |<----------------- set ----------------->|\n> > >\n> > > Measuring how many sets in the certain period, that represents\n> > > the MEMNIC PMD performance. The master workload must be very low.\n> > \n> > Sorry, I don't really understand this diagram and the associated explanation.\n> > Could you try to reword it?\n> \n> sure, will make more understandable description.\n> Could you please help me to do that?\n> \n> The purpose of this program is measuring the performance of MEMNIC PMD itself.\n> It means that we'd like to know how much the PMD takes in rx and tx API.\n> The program does rx and tx in the slave thread and the PMD performance could\n> be measured how much packets are handled in certain period. By the way we\n> need to fill and clear MEMNIC packet buffer for enabling to work the PMD rx/tx\n> in the slave thread. Then, I made the master thread which fills and clears\n> MEMNIC packet buffer in the lightest way, and it should be with the least jitter.\n> If we generate a real packet out of VM, that may cause increasing jitter\n> outside of the MEMNIC PMD, it means we will not see the precise performance\n> of MEMNIC PMD itself.\n> \n> Can you see the concept of this benchmark with the above?\n\nYes. But I think master and slave roles are confused.\nI try to reword it with less words:\n\nmemnic-tester is a benchmark tool to measure performance of MEMNIC PMD itself.\nThe master thread forward packets with Rx and Tx bursts. \nThe slave thread fills and clears packets in the lightest way. It doesn't get\npacket out of VM because it would increase jitter and hide PMD performance.\nThroughput (number of forwarded packets per second) is given for each frame size.",
        "headers": {
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            "Date": "Thu, 25 Sep 2014 11:02:04 +0200",
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            ],
            "References": "<7F861DC0615E0C47A872E6F3C5FCDDBD011A98C5@BPXM14GP.gisp.nec.co.jp>\n\t<9049135.zKavqy3ols@xps13>\n\t<7F861DC0615E0C47A872E6F3C5FCDDBD02AD9DD6@BPXM14GP.gisp.nec.co.jp>",
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            "Delivered-To": "patchwork@dpdk.org",
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            "From": "Thomas Monjalon <thomas.monjalon@6wind.com>",
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            "Organization": "6WIND",
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            "List-Post": "<mailto:dev@dpdk.org>",
            "To": "Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>",
            "Precedence": "list",
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            "Cc": "dev@dpdk.org, Hayato Momma <h-momma@ce.jp.nec.com>",
            "List-Archive": "<http://dpdk.org/ml/archives/dev/>",
            "Subject": "Re: [dpdk-dev] [memnic PATCH 1/7] guest: memnic-tester: PMD\n\tbenchmark in guest"
        }
    },
    {
        "id": 975,
        "web_url": "https://patches.dpdk.org/comment/975/",
        "msgid": "<7F861DC0615E0C47A872E6F3C5FCDDBD02AD9DD6@BPXM14GP.gisp.nec.co.jp>",
        "date": "2014-09-24T23:54:19",
        "subject": "Re: [dpdk-dev] [memnic PATCH 1/7] guest: memnic-tester: PMD\n\tbenchmark in guest",
        "submitter": {
            "id": 38,
            "url": "https://patches.dpdk.org/api/people/38/",
            "name": "Hiroshi Shimamoto",
            "email": "h-shimamoto@ct.jp.nec.com"
        },
        "content": "Hi,\n> Subject: Re: [dpdk-dev] [memnic PATCH 1/7] guest: memnic-tester: PMD benchmark in guest\n> \n> Hi Hiroshi,\n> \n> 2014-09-11 07:46, Hiroshi Shimamoto:\n> >  master |<- put packets ->|     |<- get packets ->|\n> >  slave  |   |<- rx packets ->|<- tx packets ->|   |\n> >         |<----------------- set ----------------->|\n> >\n> > Measuring how many sets in the certain period, that represents\n> > the MEMNIC PMD performance. The master workload must be very low.\n> \n> Sorry, I don't really understand this diagram and the associated explanation.\n> Could you try to reword it?\n\nsure, will make more understandable description.\nCould you please help me to do that?\n\nThe purpose of this program is measuring the performance of MEMNIC PMD itself.\nIt means that we'd like to know how much the PMD takes in rx and tx API.\nThe program does rx and tx in the slave thread and the PMD performance could\nbe measured how much packets are handled in certain period. By the way we\nneed to fill and clear MEMNIC packet buffer for enabling to work the PMD rx/tx\nin the slave thread. Then, I made the master thread which fills and clears\nMEMNIC packet buffer in the lightest way, and it should be with the least jitter.\nIf we generate a real packet out of VM, that may cause increasing jitter\noutside of the MEMNIC PMD, it means we will not see the precise performance\nof MEMNIC PMD itself.\n\nCan you see the concept of this benchmark with the above?\n\nthanks,\nHiroshi\n\n> \n> Thanks\n> --\n> Thomas",
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            "In-Reply-To": "<9049135.zKavqy3ols@xps13>",
            "Thread-Topic": "[dpdk-dev] [memnic PATCH 1/7] guest: memnic-tester: PMD\n\tbenchmark in guest",
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            ],
            "References": "<7F861DC0615E0C47A872E6F3C5FCDDBD011A98C5@BPXM14GP.gisp.nec.co.jp>\n\t<9049135.zKavqy3ols@xps13>",
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            "From": "Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>",
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            "To": "Thomas Monjalon <thomas.monjalon@6wind.com>",
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            "Subject": "Re: [dpdk-dev] [memnic PATCH 1/7] guest: memnic-tester: PMD\n\tbenchmark in guest",
            "Cc": "\"dev@dpdk.org\" <dev@dpdk.org>, Hayato Momma <h-momma@ce.jp.nec.com>",
            "List-Archive": "<http://dpdk.org/ml/archives/dev/>",
            "Date": "Wed, 24 Sep 2014 23:54:19 +0000"
        }
    },
    {
        "id": 957,
        "web_url": "https://patches.dpdk.org/comment/957/",
        "msgid": "<9049135.zKavqy3ols@xps13>",
        "date": "2014-09-24T15:10:51",
        "subject": "Re: [dpdk-dev] [memnic PATCH 1/7] guest: memnic-tester: PMD\n\tbenchmark in guest",
        "submitter": {
            "id": 1,
            "url": "https://patches.dpdk.org/api/people/1/",
            "name": "Thomas Monjalon",
            "email": "thomas.monjalon@6wind.com"
        },
        "content": "Hi Hiroshi,\n\n2014-09-11 07:46, Hiroshi Shimamoto:\n>  master |<- put packets ->|     |<- get packets ->|\n>  slave  |   |<- rx packets ->|<- tx packets ->|   |\n>         |<----------------- set ----------------->|\n> \n> Measuring how many sets in the certain period, that represents\n> the MEMNIC PMD performance. The master workload must be very low.\n\nSorry, I don't really understand this diagram and the associated explanation.\nCould you try to reword it?\n\nThanks",
        "headers": {
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            "Date": "Wed, 24 Sep 2014 17:10:51 +0200",
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            "From": "Thomas Monjalon <thomas.monjalon@6wind.com>",
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            "Subject": "Re: [dpdk-dev] [memnic PATCH 1/7] guest: memnic-tester: PMD\n\tbenchmark in guest"
        }
    }
]