Re: Traffic shaping at 10~300mbps at a 10Gbps link

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How you make filters, it's one level or multilevel based?

W dniu 09.06.2021 o 17:04, Ethy H. Brito pisze:
> Hi Guys!
>
> Doesn't anybody can help me with this?
> Any help will be appreciated.
>
> Cheers
>
> Ethy
>
>
> On Mon, 7 Jun 2021 13:38:53 -0300
> "Ethy H. Brito" <[email protected]> wrote:
>
>> Hi
>>
>> I am having a hard time trying to shape 3000 users at ceil speeds from 10 to 300mbps in a 7/7Gbps link using
>> HTB+SFQ+TC(filter by IP hashkey mask) for a few days now tweaking HTB and SFQ parameters with no luck so far.
>>
>> Everything seems right, up 4Gbps overall download speed with shaping on.
>> I have no significant packets delay, no dropped packets and no high CPU average loads (not more than 20% - htop info)
>>
>> But when the speed comes to about 4.5Gbps download (upload is about 500mbps), chaos kicks in.
>> CPU load goes sky high (all 24x2.4Ghz physical cores above 90% - 48x2.4Ghz if count that virtualization is on) and as a
>> consequence packets are dropped (as reported by tc -s class sh ...), RTT goes above 200ms and a lots of ungry users. This
>> goes from about 7PM to 11 PM every day.
>>
>> If I turn shaping off, everything return to normality immediately and peaks of not more than 5Gbps (1 second average) are
>> observed and a CPU load of about 5%. So I infer the uplink is not crowded.
>>
>> I use one root HTB qdisc and one root (1:) HTB class.
>> Then about 20~30 same level (1:xx) inner classes to (sort of) separate the users by region
>> And under these inner classes, goes the almost 3000 leaves (1:xxxx).
>> I have one class with about 900 users and this quantity decreases by the other inner classes having some of them with just
>> one user.
>>
>> Is the way I'm using HTB+SFQ+TC suitable for this job?
>>
>> Since the script that creates the shaping environment is too long I do not post it here.
>>
>> What can I inform you guys to help me solve this?
>> Fragments of code, stats, some measurements? What?
>>
>> Thanks.
>>
>> Regards
>>
>> Ethy
>
-- 
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Pozdrawiam
Adam Nieścierowicz


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