Major performance regression

Installing and Using OpenWrt
1

Hi,

I've upgraded my PC-Engines APU-3 router from 19.07.7 to 21.02.1 (both x86-64) and I'm seeing a major performance regression.

On the old version I could get to 1Gbps line-speed, but on the new version I can't even make half that.

Also tried upgrading to 19.07.8 and even that small upgrade shows a performance regression, though not as bad: I can no longer reach line-speed but at most up to 900Mbps.

I'm seeing just a single CPU loaded on the new version, while on the old version the load is distributed over multiple CPUs.
My internet is on a VLAN.
I have a few forwarded ports.

I've tried many many things, even setting all CPUs to the performance govenor, but I've gotten no further.

Any recognition or tips?

2

When going from 19.0x to 21.02.x, reconfig from scratch.

3

I tried that too. No difference

4

Have been struggling with it all day today, and got more info when looking at the CPU loads

5

Looks like the APU-3 isn't supported on 21.02.1

6

The correct page suggests otherwise :stuck_out_tongue:

7

Iirc software flow offloading is disabled by default in 21.02 releases due to IPv6 brokeness, maybe this is causing your performance degration?

8

SW offloading is/was not enabled.

9

Looks like some documentation updating/cleanup is needed.

10

Also in 19.x? Well then I can only guess that maybe some kernel issue crept in. The fact that only one core is utilized compared to all cores on 19.x sounds like a kernel misconfiguration or something.

11

Unless something else is enabled like QoS/shaping?

12

No QoS is enabled, that only makes it worse (tried it though)

14

Can you please post output of:

dmesg
cat /proc/interrupts
lscpu or cat /proc/cpuinfo

15

Unfortunately I've reverted the router back to 19.07.7

16

Just found out that the regression is in Firefox, not in OpenWRT (luckily, but still strange).
When I run the bandwidth check in Google Chrome everything is fine.

17

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