I own TP-Link Archer C2600.
It has Dual-Core 1.4 Ghz CPU. I'm using it with SQM and 250/20 Mb/s connection.
I noticed that the second core is not being used almost at all. The entire device feels sluggish. I can't get more then 150 Mb/s with cake/layer_cake. The performance is shitty. The bufferbloat goes through the roof. With the previous old WR1043NDv1 (400 Mhz CPU) I was getting much better performance. The htop shows almost 100% usage for one core during speedtests.
I thought that the IPQ806x platform is powerful but this feels like a disappointment. Can anyone share with me their experiences with SQM and IPQ806x platform?
I saw irqbalance but I don't know how to run it.
The service irqbalance start does not exist. I don't want to manually enter irqbalance --oneshot every time I reboot the device. Also I think it only helps if it works continuously when the load changes.
I also saw both the threads you linked and I can't get a straight answer if it actually helps. This is a direct quote from you BTW:
Great that irqbalance helped you. But be cautious with it. Dissent1 noticed some problems if that was active quite at the boot. I did not achieve any magic improvement with it myself so I am normally not running it.
If you want it to run at every reboot, just add the one-line command "irqbalance" to your /etc/rc.local script that is run at the end of the boot process. That way it starts automatically each time.
There is no need to use "--oneshot".
I don't remember where I saw @dissent1 saying something about irqbalance.
I have not actively used it myself, as I do not usually have gigabit-speed file transfers, so the general performance of R7800 is usually enough for me. (And as I publish my build as a community build, I have not wanted to force running that automatically, although the package is included in my build.)
so I switched to WRT3200ACM for default router on pppoe and I can't seem to get more that 550/500 mb down/up, no sqm, but in static ip nat worked up to 930 mb, is something that can be done, beside fast path ?
I have gigabit link usually working at 880/500 mb down/up
ran irqbalance but no improvements, cpu usage is around 60% cpu0 45% cpu1, on uplink test, cpu usage is lower but the speed is almost the same
I'm using 17.01-SNAPSHOT, not trunk so I'm not 100% sure it's happening to me but I did tried the trunk twice and the performance was indeed very bad. I guess it might be because of the issue you mentioned:
This also caught my eye:
The issue might be that on ipq806x, the switch chips are connected through a GPIO bit banged MDIO bus, so any switch register accesses are expensive (relatively).
I'm running qBittorrent instance on my home server connected with 100 Mb/s Ethernet cable. Is it possible it's causing some kind of performance degradation. I haven't noticed this on WR1043ND v4 while I had it.