From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tetsuya Mukawa <mukawa@igel.co.jp>
Subject: Re: [PATCH v9 0/2] Add VHOST PMD
Date: Fri, 4 Mar 2016 10:12:22 +0900
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Cc: "ann.zhuangyanying@huawei.com" <ann.zhuangyanying@huawei.com>, "Liu,
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To: "Qiu, Michael" <michael.qiu@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
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On 2016/03/02 11:24, Qiu, Michael wrote:
> On 3/1/2016 10:19 AM, Tetsuya Mukawa wrote:
>> On 2016/03/01 11:00, Qiu, Michael wrote:
>>> On 2/26/2016 4:36 PM, Tetsuya Mukawa wrote:
>>>> On 2016/02/26 13:29, Tetsuya Mukawa wrote:
> [...]
>
>>>>> BTW, I have set the frontend mergeable off.
>>>>> I have checked below cases.
>>>>>  - Case1: Disable mergeable feature in virtio-net PMD.
>>>>>  - Case2: Disable mergeable feature in virtio-net PMD and use
>>>>> '--txqflags=0xf01' option to use simple ring deploying.
>>>>> Both cases,  I still cannot see the drop.
>>>>>
>>>>> Anyway, I will send a few patch-series to determine the cause of drop.
>>>>> So, could you please apply them and check the performance to determine
>>>>> which cause the drop?
>>>> Hi Michael,
>>>>
>>>> I may find what causes the drop.
>>>> Could you please restart testpmd on guest when you see the drop, then
>>>> check performance again?
>>>>
>>>> I guess the drop will occur only first time when testpmd on guest and
>>>> host is connected.
>>>> Here are rough steps.
>>>>
>>>> 1. Start testpmd on host
>>>> 2. Start QEMU
>>>> 3. Start testpmd on guest
>>>>
>>>> Then you will see the drop.
>>>> Probably, if testpmd on guest is restarted, then you don't see the drop
>>>> again.
>>>>
>>>> 4. Type 'quit' on guest.
>>>> 5. Start testpmd on guest again.
>> Hi Michael,
>>
>> I am sorry that above was caused by my miss configuration.
>> So please ignore it.
>> If you can have time today, could you please check v7 and v8 performance?
> Hi, Tetsuya
>
> I have tried the qemu case but seems it does not have any difference,
> maybe my configuration is wrong.
>
> What I used to test is container case from Jianfeng.  And I make a
> mistake that V6 compiled by GCC 5.3, but V9 with GCC 4.8, after using
> the same compiler, the performance almost the same.


Hi Michael,

Sorry for late replying. And thanks for your checking.

Thanks,
Tetsuya

> Thanks,
> Michael
>
>
>> Thanks,
>> Tetsuya
>>
>>> OK, I will help to tested today.
>>>
>>> Thanks,
>>> Michael