From: Dave Taht <dave.taht@gmail.com>
To: avatli@itu.edu.tr
Cc: "codel@lists.bufferbloat.net" <codel@lists.bufferbloat.net>
Subject: Re: [Codel] Codel on DPDK
Date: Tue, 18 Oct 2016 08:44:55 -0700 [thread overview]
Message-ID: <CAA93jw7JSkEHz=FR1FPp=Ot8XM3xCwH2LOwooZP6juXS9TfrAQ@mail.gmail.com> (raw)
In-Reply-To: <CAA93jw73+t4cwyMqwxh-M8eooRCcTPxXabp1+zXf4=hJd3o0Dg@mail.gmail.com>
On Tue, Oct 18, 2016 at 8:43 AM, Dave Taht <dave.taht@gmail.com> wrote:
> On Tue, Oct 18, 2016 at 4:42 AM, <avatli@itu.edu.tr> wrote:
>> Hello
>>
>> I'm trying to implement CoDel-like implementation on Intel's DPDK library,
>> but I have trouble with measuring packet sojourn time on RX/TX queues
>> because of DMA usage. When I call send() function, DPDK puts the packets
>> into DMA-region and I have no idea when the packets sent really into
>> network. Likewise, when I call recv(), I don't have any idea when the
>> packets arrived, so I'm not sure totally but I think I have no chance to
>> measure sojourn time for dma-like implementation. Could you please correct
>> me if I'm wrong. Also any comments/suggestions would be greatly appreciated.
>
> I am under the impression there is a dpdk implementation already, somewhere.
codel, pie, etc, for dpdk: https://git.scc.kit.edu/TM/DPDK_AQM_Switch.git
I have not looked this over for accuracy or completeness.
> As for the amount of time things spend in dma, you are hopefully
> talking about a few mere
> us, and the default for codel is only worrying about ms, so you can do
> the codel work before the send and after the recv.
>
>> Thanks in advance..
>>
>> - Volkan
>>
>>
>> _______________________________________________
>> Codel mailing list
>> Codel@lists.bufferbloat.net
>> https://lists.bufferbloat.net/listinfo/codel
>>
>
>
>
> --
> Dave Täht
> Let's go make home routers and wifi faster! With better software!
> http://blog.cerowrt.org
--
Dave Täht
Let's go make home routers and wifi faster! With better software!
http://blog.cerowrt.org
prev parent reply other threads:[~2016-10-18 15:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-18 11:42 avatli
2016-10-18 15:43 ` Dave Taht
2016-10-18 15:44 ` Dave Taht [this message]
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