[Make-wifi-fast] debugging TCP stalls on high-speed wifi
eric.dumazet at gmail.com
Thu Dec 12 20:46:55 EST 2019
On 12/12/19 4:59 PM, Simon Barber wrote:
> I’m currently adding ACK thinning to Linux’s GRO code. Quite a simple addition given the way that code works.
1) It will not help since many NIC do not use GRO.
2) This does not help if you receive one ACK per NIC interrupt, which is quite common.
3) This breaks GRO transparency.
4) TCP can implement this in a more effective/controlled way,
since the peer know a lot more flow characteristics.
Middle-box should not try to make TCP better, they usually break things.
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