network topology:
80211g uplink - 30Mbps is brought into litebeam-5AC that is running AP
(WDS) mode on 5GHz radio. client device is a laptop (dualcore 2.4GHz)
running QCA9880 card on ubuntu 10.04 with kernel 4.9.
description:
booting ubuntu defaults to performance governor (personal
modification), opening speedtest.net upon boot and measuring
throughput gets me about 25Mbps download speed.
setting lowest CPU scaling freq of both cores (600MHz) and repeating
the speedtest gets about 29-30Mbps in download. i have verified these
speed differences while downloading several iso files.
confirmation:
identical results have been observed on a live booted ubuntu 19.10
identical results have been observed on ubuntu 10.04, but using
ethernet connection from archer c7 that was connected in client mode
to litebeam5
ruled out so far:
-using regular AP-STA instead of APWDS-STAWDS interfaces does not change a thing
-switching to Ben's CT driver and firmware had no impact, the bug is
present with it too
-using different card QCA9862/QCA9880 behavior is the same
quick update:
could not reproduce this on another machine; setting all cores to
lowest state (1.40GHz) and measuring at speedtest gives about 25Mbps
(ubuntu 19.10 live boot defaults), same rate is measured on win10 or
any other ubuntu version with ondemand governor
the machine this has been discovered on is compaq 6735b (it is running
turion x2 ZM87 CPU)
i can reproduce download results difference with ath10k card
connecting to an ath9k 2.4GHz AP directly (without litebeam as bridge)
one more thing discovered: while testing this on ISP's bandwidth test
site the dl speed increase was only reproducible when loading SSL
version of the site
On 14/11/2019, Tom Psyborg <[email protected]> wrote:
> network topology:
> 80211g uplink - 30Mbps is brought into litebeam-5AC that is running AP
> (WDS) mode on 5GHz radio. client device is a laptop (dualcore 2.4GHz)
> running QCA9880 card on ubuntu 10.04 with kernel 4.9.
>
> description:
> booting ubuntu defaults to performance governor (personal
> modification), opening speedtest.net upon boot and measuring
> throughput gets me about 25Mbps download speed.
> setting lowest CPU scaling freq of both cores (600MHz) and repeating
> the speedtest gets about 29-30Mbps in download. i have verified these
> speed differences while downloading several iso files.
>
> confirmation:
> identical results have been observed on a live booted ubuntu 19.10
> identical results have been observed on ubuntu 10.04, but using
> ethernet connection from archer c7 that was connected in client mode
> to litebeam5
>
> ruled out so far:
> -using regular AP-STA instead of APWDS-STAWDS interfaces does not change a
> thing
> -switching to Ben's CT driver and firmware had no impact, the bug is
> present with it too
> -using different card QCA9862/QCA9880 behavior is the same
>