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Re: [ath9k-devel] [RFC] ath9k: improve aggregation throughput by using only first rate

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On 2010-07-26 10:37 PM, Björn Smedman wrote:
> 2010/7/26 Felix Fietkau <nbd@xxxxxxxxxxx>:
>> On 2010-07-26 9:23 PM, Björn Smedman wrote:
>>> 2010/7/26 Felix Fietkau <nbd@xxxxxxxxxxx>:
>>> * When tx is aggregated most rate control probe frames end up inside
>>> aggregates and are never used for probing (effective probe frequency
>>> is divided by average aggregate length).
>> Nope, a probing frame never ends up inside an aggregate. It's always
>> sent out as a single frame, which is why I had to make the decision
>> about sending a probing frame more complex in minstrel_ht, compared to
>> minstrel - the previous 10% stuff was limiting aggregation size.
> 
> Ok, I must have jumped to conclusions. I looked quickly at the code
> and had the impression that it only cared about the RATE_PROBE flag if
> it was on the first subframe of the aggregate, and then I compared
> debug output from rc and xmit like this:
Oh, wait. It seems that you may be right after all. I think I was
remembering stuff from the wrong codebase again Well, at least what I
described is what I think the code should be doing ;)

- Felix
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