Question about ath10k throughput
greearb at candelatech.com
Tue Apr 21 14:38:06 PDT 2015
On 04/21/2015 02:28 PM, Shu, Nick wrote:
> Hi, Group:
> I'm doing throughout measurement on QCA9880 chip, running ath10k 3.17 driver with firmware.
> I'm able to set channel width to 80MHz, enabled all three streams, MCS index to 9 for max. data throughput.
> I verified all initial setting are correct.
> But when test starts, MCS dropped (as the results of packet error?).
> Is there any app command to send to driver to lock the MCS index during the test, so we can see better throughput?
> What is the best practical number we can get for ath10k chip? 800? 900?
Please let us know more about your test setup:
Traffic protocol type (TCP, UDP, etc)
Over-the-air tests, or using cables + attenuators?
Is this in normal environment, or in an RF isolation chamber?
We've seen as much as 950Mbps UDP download using a certain Netgear AP,
but it is not reproducible. We normally do this type of test using
sma cables + attenuators, and get mostly similar results whether in
isolation chamber or not when cabled up as long as the RF spectrum is
More often we see TCP in the 400-600 Mbps range and UDP in 700-800 Mbps
range..and with TCP, it can also be tricky to get good throughput
in our experience.
Increasing number of virtual stations decreases total throughput on most APs.
I have tried forcing the rate-control to run at specific (high) rates,
but it has not increased throughput in tests so far, so I have not played
with it that much.
> Nick Shu
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Ben Greear <greearb at candelatech.com>
Candela Technologies Inc http://www.candelatech.com
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