Even my mt7986 with quad 2ghz a53 cannot handle gigabit SQM, so I'm considering whether to give up SQM and swap their places for optimal wifi layout.
There shouldn't be much of a performance difference between them, same ARMv8 core, almost the same frequency, very similar IP cores and sqm is single threaded (so the core count has little impact).
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Actually I'm asking about performance without SQM, sorry for bad wording.
Anyway, I tried that out myself and yes, it can handle gigabit with hardware offloading enabled. Question resolved.
all of mt7621, mt7622 and mt798x can handle 1gbit/s without SQM, and even without using hardware NAT. As long as it is a minimum of OpenWRT v23 and a properly wired mainboard.
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Some additional infos:
With two VLANs and some nftables packet marking, the 7622 struggles significantly and just barely handles 450mbps with no sqm plus packet steering on(even worse when its off).
Hardware offload solves this, reaching full 1gbps.
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