Added Latency When Using FQ Codel?
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Hi all,
I have noticed when using Limiters w/fq_codel that latency is higher when I perform a simple ping test between two separate subnets. Consider the following setup:
Subnet A (192.168.1.0/24) with Limiter/fq_codel enabled on outbound LAN firewall rule.
Subnet B (192.168.2.0/24) with Limiter/fq_codel enabled on outbound LAN firewall ruleSubnet A is allowed to pass traffic to Subnet B.
When I ping subnet B (e.g. let's say the gateway at 192.168.2.1) from a machine on subnet A I see that latency is about 100 - 200 microseconds (0.1 - 0.2 milliseconds) higher compared to if I remove the Limiters/fq_codel from subnet A's outbound LAN firewall rule completely.
I'm curious if you guys think this should be the expected behavior when using Limiters/fq_codel? I realize there is now Fair Queuing (FQ) and AQM (Codel) when applying the queues to the outbound LAN rule, but 0.1 - 0.2ms seems high to me, even when considering that some delay is expected due to additional processing required.
What do you guys think? Thanks in advance.
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