Hi,
I think we have some similar thread before:
https://sourceforge.net/p/ryu/mailman/ryu-devel/thread/CAM5MNiVPXW3xWeoHPMriXvSKkUnAHbgv6LqRZ%2BrE5rOZqDKaLQ%40mail.gmail.com/#msg35801377
Basically, I would suggest using multiple Ryu instance(process) to install
flows to switch.
2017-06-19 3:44 GMT-07:00 corey ross <coreyvr...@gmail.com>:
> Yes I am referring to the first statement "multi-thread on Python is not
> effective enough"...
>
> Please let me give another example to make my question more clear
> Lets say the routing algorithm wants to update the paths on switch S1, S2,
> S3. One way is to update all the switches at time 0 (in parallel), and the
> other way is to update s1 at time 0, s2 at time 1, and s3 at time 3
> (serial).
>
> Because of GIL in python a thread has to finish its task before moving to
> another thread; with this in mind I believe using threads will update the
> switches in serial; because the first thread has to finish installing the
> rules on s1, then it moves to the next thread to install the rules on s2
> and so on....
>
> So my question is in Ryu what mechanism I can use to update s1, s2, s3 at
> time 0 (in one go)?
> I hope my question is more clear now.
>
>
> Thank you all for your time,
> Corry
>
>
>
>
>
> On Mon, Jun 19, 2017 at 5:26 AM, Iwase Yusuke <iwase.yusu...@gmail.com>
> wrote:
>
>> Hi,
>>
>>
>> On 2017年06月17日 20:47, corey ross wrote:
>> > Hey there,
>> > I was wondering if it is possible to install multiple flows in
>> parallel, if yes how?
>> >
>> > for e.g if I have a topology of three switches (s1, s2, s3), I want to
>> install flow-rules f1 on s1, f2 on s2 and f3 on s3. How can I install this
>> three flow rules in parallel instead of doing so in serial fashion?
>> >
>> > I have searched around and It seems that using threads is not an
>> effective way.
>>
>> Please let me make your question more clear.
>> What does "in parallel" and "in serial" exactly mean?
>>
>> You mean; you currently uses multi-thread (using "ryu.lib.hub" or
>> "eventlet"),
>> but some post you read says "multi-thread on Python is not effective
>> enough",
>> right?
>> If so, are you facing the performance limit, for example?
>>
>> Or, you want to get "Datapath" instance for s2 and s3, when you get event
>> from
>> s1?
>>
>> Thanks,
>> Iwase
>>
>> >
>> >
>> >
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>>
>
>
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--
Yi Tseng (a.k.a Takeshi)
Taiwan National Chiao Tung University
Department of Computer Science
W2CNLab
https://takeshi.tw
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