I've found a similar problem on mikrotik rb5009:
https://forum.mikrotik.com/viewtopic.php?t=185253
its seems like a bug from linux kernel driver dsa?
rb5009 is using marvell 88e6393x switch chip which using dsa
https://www.kernel.org/doc/Documentation/networking/dsa/dsa.txt
I cannot say maybe you're right. R7800 still use the old swconfig switch driver.
Can you repeat the tests with simultaneous WAN and LAN traffic.
According to your diagram - run iperf3 to create traffic from PC1 to PC2 - should be ~100Mbps. At the same time run WAN speed test on PC1 - should be ~200Mbps with ping <1ms. If you see any WAN performace drop and ping increase then we're dealing with the same issue.
I'm sure it's been mentioned a trillion times before, but, how do I make the R7800 work in AP mode only? Also, is it possible for it to function as a switch and an AP ?
Thanks
There's nothing r7800 specific about that, just https://openwrt.org/docs/guide-user/network/wifi/dumbap (if you ignore the WAN port (the optional re-defining of its functionality to yet another LAN port), there's nothing to do about the switch config either).
@robimarko i reached a new record... (i'm trying to source out of pxo that is 25mhz ahahahha)
root@OpenWrt:/# ./mhz
count=5956 us50=21429 us250=109439 diff=88010 cpu_MHz=13.535
root@OpenWrt:/# ./mbw 1
Long uses 4 bytes. Allocating 2*262144 elements = 2097152 bytes of memory.
Using 262144 bytes as blocks for memcpy block copy test.
Getting down to business... Doing 10 runs per test.
0 Method: MEMCPY Elapsed: 0.02722 MiB: 1.00000 Copy: 36.735 MiB/s
1 Method: MEMCPY Elapsed: 0.02798 MiB: 1.00000 Copy: 35.739 MiB/s
2 Method: MEMCPY Elapsed: 0.02858 MiB: 1.00000 Copy: 34.994 MiB/s
3 Method: MEMCPY Elapsed: 0.02877 MiB: 1.00000 Copy: 34.762 MiB/s
4 Method: MEMCPY Elapsed: 0.02864 MiB: 1.00000 Copy: 34.914 MiB/s
5 Method: MEMCPY Elapsed: 0.02860 MiB: 1.00000 Copy: 34.961 MiB/s
6 Method: MEMCPY Elapsed: 0.02781 MiB: 1.00000 Copy: 35.963 MiB/s
7 Method: MEMCPY Elapsed: 0.02830 MiB: 1.00000 Copy: 35.333 MiB/s
8 Method: MEMCPY Elapsed: 0.03186 MiB: 1.00000 Copy: 31.388 MiB/s
9 Method: MEMCPY Elapsed: 0.02958 MiB: 1.00000 Copy: 33.808 MiB/s
AVG Method: MEMCPY Elapsed: 0.02873 MiB: 1.00000 Copy: 34.802 MiB/s
0 Method: DUMB Elapsed: 0.38641 MiB: 1.00000 Copy: 2.588 MiB/s
1 Method: DUMB Elapsed: 0.37320 MiB: 1.00000 Copy: 2.680 MiB/s
2 Method: DUMB Elapsed: 0.37296 MiB: 1.00000 Copy: 2.681 MiB/s
3 Method: DUMB Elapsed: 0.37329 MiB: 1.00000 Copy: 2.679 MiB/s
4 Method: DUMB Elapsed: 0.37255 MiB: 1.00000 Copy: 2.684 MiB/s
5 Method: DUMB Elapsed: 0.37319 MiB: 1.00000 Copy: 2.680 MiB/s
6 Method: DUMB Elapsed: 0.37488 MiB: 1.00000 Copy: 2.668 MiB/s
7 Method: DUMB Elapsed: 0.37017 MiB: 1.00000 Copy: 2.701 MiB/s
8 Method: DUMB Elapsed: 0.37320 MiB: 1.00000 Copy: 2.680 MiB/s
9 Method: DUMB Elapsed: 0.37408 MiB: 1.00000 Copy: 2.673 MiB/s
AVG Method: DUMB Elapsed: 0.37439 MiB: 1.00000 Copy: 2.671 MiB/s
0 Method: MCBLOCK Elapsed: 0.02896 MiB: 1.00000 Copy: 34.532 MiB/s
1 Method: MCBLOCK Elapsed: 0.02935 MiB: 1.00000 Copy: 34.066 MiB/s
2 Method: MCBLOCK Elapsed: 0.03028 MiB: 1.00000 Copy: 33.025 MiB/s
3 Method: MCBLOCK Elapsed: 0.02784 MiB: 1.00000 Copy: 35.920 MiB/s
4 Method: MCBLOCK Elapsed: 0.02877 MiB: 1.00000 Copy: 34.754 MiB/s
5 Method: MCBLOCK Elapsed: 0.02778 MiB: 1.00000 Copy: 36.001 MiB/s
6 Method: MCBLOCK Elapsed: 0.02896 MiB: 1.00000 Copy: 34.534 MiB/s
7 Method: MCBLOCK Elapsed: 0.02783 MiB: 1.00000 Copy: 35.936 MiB/s
8 Method: MCBLOCK Elapsed: 0.02901 MiB: 1.00000 Copy: 34.468 MiB/s
9 Method: MCBLOCK Elapsed: 0.02902 MiB: 1.00000 Copy: 34.460 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02878 MiB: 1.00000 Copy: 34.746 MiB/s
Hehe, but the fun fact is that it works
@facboy sorry for the tag... do you think these values are correct?
Setting scaling_max_freq to 384000
AVG Method: MEMCPY Elapsed: 0.03657 MiB: 16.00000 Copy: 437.564 MiB/s
AVG Method: DUMB Elapsed: 0.42556 MiB: 16.00000 Copy: 37.597 MiB/s
AVG Method: MCBLOCK Elapsed: 0.03649 MiB: 16.00000 Copy: 438.514 MiB/s
AVG Method: MEMCPY Elapsed: 0.00232 MiB: 1.00000 Copy: 430.608 MiB/s
AVG Method: DUMB Elapsed: 0.02743 MiB: 1.00000 Copy: 36.457 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00230 MiB: 1.00000 Copy: 434.141 MiB/s
Setting scaling_max_freq to 600000
AVG Method: MEMCPY Elapsed: 0.02870 MiB: 16.00000 Copy: 557.447 MiB/s
AVG Method: DUMB Elapsed: 0.26741 MiB: 16.00000 Copy: 59.834 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02805 MiB: 16.00000 Copy: 570.347 MiB/s
AVG Method: MEMCPY Elapsed: 0.00183 MiB: 1.00000 Copy: 545.673 MiB/s
AVG Method: DUMB Elapsed: 0.01685 MiB: 1.00000 Copy: 59.358 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00176 MiB: 1.00000 Copy: 566.958 MiB/s
Setting scaling_max_freq to 800000
AVG Method: MEMCPY Elapsed: 0.02632 MiB: 16.00000 Copy: 607.861 MiB/s
AVG Method: DUMB Elapsed: 0.18825 MiB: 16.00000 Copy: 84.995 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02692 MiB: 16.00000 Copy: 594.250 MiB/s
AVG Method: MEMCPY Elapsed: 0.00169 MiB: 1.00000 Copy: 590.877 MiB/s
AVG Method: DUMB Elapsed: 0.01165 MiB: 1.00000 Copy: 85.824 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00170 MiB: 1.00000 Copy: 589.414 MiB/s
Setting scaling_max_freq to 1000000
AVG Method: MEMCPY Elapsed: 0.02611 MiB: 16.00000 Copy: 612.740 MiB/s
AVG Method: DUMB Elapsed: 0.15128 MiB: 16.00000 Copy: 105.761 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02612 MiB: 16.00000 Copy: 612.454 MiB/s
AVG Method: MEMCPY Elapsed: 0.00161 MiB: 1.00000 Copy: 622.820 MiB/s
AVG Method: DUMB Elapsed: 0.00945 MiB: 1.00000 Copy: 105.770 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00160 MiB: 1.00000 Copy: 626.409 MiB/s
Setting scaling_max_freq to 1400000
AVG Method: MEMCPY Elapsed: 0.02122 MiB: 16.00000 Copy: 754.134 MiB/s
AVG Method: DUMB Elapsed: 0.10930 MiB: 16.00000 Copy: 146.390 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02116 MiB: 16.00000 Copy: 756.287 MiB/s
AVG Method: MEMCPY Elapsed: 0.00143 MiB: 1.00000 Copy: 699.496 MiB/s
AVG Method: DUMB Elapsed: 0.00677 MiB: 1.00000 Copy: 147.796 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00142 MiB: 1.00000 Copy: 706.664 MiB/s
Setting scaling_max_freq to 1725000
AVG Method: MEMCPY Elapsed: 0.02506 MiB: 16.00000 Copy: 638.394 MiB/s
AVG Method: DUMB Elapsed: 0.09251 MiB: 16.00000 Copy: 172.950 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02463 MiB: 16.00000 Copy: 649.538 MiB/s
AVG Method: MEMCPY Elapsed: 0.00158 MiB: 1.00000 Copy: 632.031 MiB/s
AVG Method: DUMB Elapsed: 0.00573 MiB: 1.00000 Copy: 174.593 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00155 MiB: 1.00000 Copy: 645.870 MiB/s
Setting scaling_max_freq to 800000
AVG Method: MEMCPY Elapsed: 0.03072 MiB: 16.00000 Copy: 520.813 MiB/s
AVG Method: DUMB Elapsed: 0.18795 MiB: 16.00000 Copy: 85.128 MiB/s
AVG Method: MCBLOCK Elapsed: 0.03077 MiB: 16.00000 Copy: 520.026 MiB/s
AVG Method: MEMCPY Elapsed: 0.00197 MiB: 1.00000 Copy: 507.537 MiB/s
AVG Method: DUMB Elapsed: 0.01177 MiB: 1.00000 Copy: 84.934 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00198 MiB: 1.00000 Copy: 506.175 MiB/s
Setting scaling_max_freq to 1000000
AVG Method: MEMCPY Elapsed: 0.03120 MiB: 16.00000 Copy: 512.885 MiB/s
AVG Method: DUMB Elapsed: 0.15305 MiB: 16.00000 Copy: 104.539 MiB/s
AVG Method: MCBLOCK Elapsed: 0.03183 MiB: 16.00000 Copy: 502.723 MiB/s
AVG Method: MEMCPY Elapsed: 0.00198 MiB: 1.00000 Copy: 506.329 MiB/s
AVG Method: DUMB Elapsed: 0.00950 MiB: 1.00000 Copy: 105.304 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00194 MiB: 1.00000 Copy: 515.384 MiB/s
Setting scaling_max_freq to 1400000
AVG Method: MEMCPY Elapsed: 0.02481 MiB: 16.00000 Copy: 645.026 MiB/s
AVG Method: DUMB Elapsed: 0.11144 MiB: 16.00000 Copy: 143.572 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02606 MiB: 16.00000 Copy: 614.081 MiB/s
AVG Method: MEMCPY Elapsed: 0.00160 MiB: 1.00000 Copy: 625.117 MiB/s
AVG Method: DUMB Elapsed: 0.00691 MiB: 1.00000 Copy: 144.779 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00161 MiB: 1.00000 Copy: 622.239 MiB/s
Setting scaling_max_freq to 1725000
AVG Method: MEMCPY Elapsed: 0.02445 MiB: 16.00000 Copy: 654.298 MiB/s
AVG Method: DUMB Elapsed: 0.09257 MiB: 16.00000 Copy: 172.849 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02450 MiB: 16.00000 Copy: 653.125 MiB/s
AVG Method: MEMCPY Elapsed: 0.00159 MiB: 1.00000 Copy: 629.842 MiB/s
AVG Method: DUMB Elapsed: 0.00573 MiB: 1.00000 Copy: 174.520 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00156 MiB: 1.00000 Copy: 639.550 MiB/s
Setting scaling_max_freq to 600000
Setting scaling_max_freq to 1000000
AVG Method: MEMCPY Elapsed: 0.03004 MiB: 16.00000 Copy: 532.620 MiB/s
AVG Method: DUMB Elapsed: 0.15444 MiB: 16.00000 Copy: 103.601 MiB/s
AVG Method: MCBLOCK Elapsed: 0.03030 MiB: 16.00000 Copy: 528.077 MiB/s
AVG Method: MEMCPY Elapsed: 0.00190 MiB: 1.00000 Copy: 526.704 MiB/s
AVG Method: DUMB Elapsed: 0.00955 MiB: 1.00000 Copy: 104.738 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00190 MiB: 1.00000 Copy: 525.873 MiB/s
Setting scaling_max_freq to 600000
Setting scaling_max_freq to 1400000
AVG Method: MEMCPY Elapsed: 0.02549 MiB: 16.00000 Copy: 627.734 MiB/s
AVG Method: DUMB Elapsed: 0.11149 MiB: 16.00000 Copy: 143.506 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02494 MiB: 16.00000 Copy: 641.424 MiB/s
AVG Method: MEMCPY Elapsed: 0.00159 MiB: 1.00000 Copy: 628.970 MiB/s
AVG Method: DUMB Elapsed: 0.00690 MiB: 1.00000 Copy: 144.892 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00160 MiB: 1.00000 Copy: 626.645 MiB/s
Setting scaling_max_freq to 600000
Setting scaling_max_freq to 1725000
AVG Method: MEMCPY Elapsed: 0.02506 MiB: 16.00000 Copy: 638.503 MiB/s
AVG Method: DUMB Elapsed: 0.09260 MiB: 16.00000 Copy: 172.785 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02467 MiB: 16.00000 Copy: 648.603 MiB/s
AVG Method: MEMCPY Elapsed: 0.00160 MiB: 1.00000 Copy: 625.352 MiB/s
AVG Method: DUMB Elapsed: 0.00574 MiB: 1.00000 Copy: 174.110 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00160 MiB: 1.00000 Copy: 623.247 MiB/s
Setting scaling_max_freq to 600000
Setting scaling_max_freq to 1400000
AVG Method: MEMCPY Elapsed: 0.02548 MiB: 16.00000 Copy: 628.047 MiB/s
AVG Method: DUMB Elapsed: 0.11193 MiB: 16.00000 Copy: 142.944 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02506 MiB: 16.00000 Copy: 638.463 MiB/s
AVG Method: MEMCPY Elapsed: 0.00158 MiB: 1.00000 Copy: 634.880 MiB/s
AVG Method: DUMB Elapsed: 0.00690 MiB: 1.00000 Copy: 144.938 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00158 MiB: 1.00000 Copy: 634.276 MiB/s
Setting scaling_max_freq to 1000000
Setting scaling_max_freq to 1000000
AVG Method: MEMCPY Elapsed: 0.02992 MiB: 16.00000 Copy: 534.784 MiB/s
AVG Method: DUMB Elapsed: 0.15168 MiB: 16.00000 Copy: 105.486 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02995 MiB: 16.00000 Copy: 534.206 MiB/s
AVG Method: MEMCPY Elapsed: 0.00197 MiB: 1.00000 Copy: 507.382 MiB/s
AVG Method: DUMB Elapsed: 0.00952 MiB: 1.00000 Copy: 105.087 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00192 MiB: 1.00000 Copy: 521.921 MiB/s
Setting scaling_max_freq to 1000000
Setting scaling_max_freq to 1400000
AVG Method: MEMCPY Elapsed: 0.02478 MiB: 16.00000 Copy: 645.643 MiB/s
AVG Method: DUMB Elapsed: 0.11017 MiB: 16.00000 Copy: 145.224 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02496 MiB: 16.00000 Copy: 641.123 MiB/s
AVG Method: MEMCPY Elapsed: 0.00167 MiB: 1.00000 Copy: 600.060 MiB/s
AVG Method: DUMB Elapsed: 0.00691 MiB: 1.00000 Copy: 144.810 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00160 MiB: 1.00000 Copy: 624.415 MiB/s
Setting scaling_max_freq to 1000000
Setting scaling_max_freq to 1725000
AVG Method: MEMCPY Elapsed: 0.02456 MiB: 16.00000 Copy: 651.399 MiB/s
AVG Method: DUMB Elapsed: 0.09137 MiB: 16.00000 Copy: 175.106 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02461 MiB: 16.00000 Copy: 650.237 MiB/s
AVG Method: MEMCPY Elapsed: 0.00157 MiB: 1.00000 Copy: 637.471 MiB/s
AVG Method: DUMB Elapsed: 0.00574 MiB: 1.00000 Copy: 174.292 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00155 MiB: 1.00000 Copy: 645.828 MiB/s
Setting scaling_max_freq to 384000
Setting scaling_max_freq to 1725000
AVG Method: MEMCPY Elapsed: 0.02459 MiB: 16.00000 Copy: 650.753 MiB/s
AVG Method: DUMB Elapsed: 0.09255 MiB: 16.00000 Copy: 172.877 MiB/s
AVG Method: MCBLOCK Elapsed: 0.02445 MiB: 16.00000 Copy: 654.341 MiB/s
AVG Method: MEMCPY Elapsed: 0.00155 MiB: 1.00000 Copy: 646.162 MiB/s
AVG Method: DUMB Elapsed: 0.00578 MiB: 1.00000 Copy: 172.927 MiB/s
AVG Method: MCBLOCK Elapsed: 0.00150 MiB: 1.00000 Copy: 667.824 MiB/s
Setting scaling_max_freq to 370000
Anyway no idea why the DUMB method is a direct way to get the current freq of the system... It does never fail.... for some reasons....
it seems a bit odd it got slower? your first run at 1.4g it hit 750mib, then at 1.7 it only did 640mib and after that everything seemed a bit slower.
fwiw mine hits 780mib at 1.7g, i'm on a few months old master build - have my own custom branch but its ~r17783.
is memcpy and memblock important? this with the l2 workaround reverted... will check if i gets different results with that up... Still can't understand why dumb values are correct but memcpy aren't...
Quiet here, any update on the scaling issue/crash?
My R7800 just passed 100 days of uptme with minfreq raised to 800Mhz... so I have to say it's stable as a rock with the workaround.
I'm also using the ath10k driver and firmware-5.bin_10.4-3.9.0.2-00156 FW from QCA.
I've been running mine with the performance governor always at max 1.7GHz for years without any problems. Not sure it's worth the constant scaling, it's not a phone running on battery and the temp increase is negligible 2-3C in my experience.
Also on mainline driver and firmware 
Now, I hope someone will figure out a fix for the AQL issue ... I'm stuck on 21.02.1 because of it 
Hello
I'm facing a constant kernel oops with IPSec/Strongswan on 5.15 (since .33).
The crash occurs when doing a NAT mapping event (client switches to another IP) in xfrm part of the kernel: https://github.com/strongswan/strongswan/issues/992
I spent something like 24 hours on this issue and I now think it might be related to some patches applied on the kernel.
Does "someone who knows" could please take a look ?
To keep the temps down, if you're running performance governor or other higher clock speeds, I noticed that putting the router on a "vented" surface instead of a flat table helps quite a lot with the temps.
I have mine on a window sill that has gaps between the wood pieces.
My router is placed on a Foot stove (Netherland's model) because then I could use the holes on the top to route power and network cables for 2 SBCs stored in it.
I also think it looks kind of 'cute'.
Never thought (about) that it would (also) help with cooling 
If anyone wants to test i'm currently cleaning the 5.15 patches
(so to test this enable testing kernel version)
I'm trying a different implementation of the cache scaling driver... No fixes about the power loss but it's just a cleanup where i replace patches with upstream version.
Would love some feedback
https://git.openwrt.org/?p=openwrt/staging/ansuel.git;a=shortlog;h=refs/heads/ipq806x-cleanup
no idea if it's luck but the changes are producing more uptime...
would love more testing tho....
Hey @quarky, I noticed sometimes my Wifi becomes very slow, it's hardly usable, it goes away after maybe 5-10 minutes. Sounds familiar? 
I see this when my R7800 is running the virtual time-based airtime scheduler. Since it was reverted back to the round-robin scheduler plus enhancement patch my R7800 appears to be good.
Were there any other workaround other than patching? I don't quite remember.
I don't feel like poking around too much since the build is very stable apart from the occasional wifi slowness.
Restarting WiFi clears up the problem for me, so maybe you may want to write a script to restart WiFi every day?