[Make-wifi-fast] [Codel] fq_codel_drop vs a udp flood
leroi.lists at gmail.com
Thu May 5 12:25:52 EDT 2016
On 5 May 2016 at 19:12, Eric Dumazet <eric.dumazet at gmail.com> wrote:
> On Thu, 2016-05-05 at 17:53 +0300, Roman Yeryomin wrote:
>> qdisc fq_codel 0: dev eth0 root refcnt 2 limit 1024p flows 1024
>> quantum 1514 target 5.0ms interval 100.0ms ecn
>> Sent 12306 bytes 128 pkt (dropped 0, overlimits 0 requeues 0)
>> backlog 0b 0p requeues 0
>> maxpacket 0 drop_overlimit 0 new_flow_count 0 ecn_mark 0
>> new_flows_len 0 old_flows_len 0
> Limit of 1024 packets and 1024 flows is not wise I think.
> (If all buckets are in use, each bucket has a virtual queue of 1 packet,
> which is almost the same than having no queue at all)
> I suggest to have at least 8 packets per bucket, to let Codel have a
> chance to trigger.
> So you could either reduce number of buckets to 128 (if memory is
> tight), or increase limit to 8192.
Will try, but what I've posted is default, I didn't change/configure that.
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