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Re: [PATCH v5 5/8] ath10k: disable TX complete indication of htt for sdio

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Wen Gong <wgong@xxxxxxxxxxxxxx> writes:

> Tx complete message from firmware cost bus bandwidth of sdio, and bus
> bandwidth is the bollteneck of throughput, it will effect the bandwidth
> occupancy of data packet of TX and RX.

TBH I'm not enthuastic about this, this feels an ugly hack. And it adds
yet another module parameter which I detest.

> This patch disable TX complete indication from firmware for htt data
> packet, it results in significant performance improvement on TX path.

So how much does this feature improve through exactly? Do you have any
numbers?

> The downside of this patch is ath10k will not know the TX status of
> the data packet for poor signal situation. Although upper network stack
> or application layer have retry mechanism, the retry will be later than
> ath10k get the TX fail status if not disable TX complete.

I don't understand this description. What's the difference in practise
from user's point of view?

But I think this patch should dropped from the patchset and revisited
after rest of the patches are applied.

-- 
Kalle Valo



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