[18.06.2] speed fix for BT HomeHub 5a

#1

It seems commit 916e33fa1e14b97daf8c9bf07a1b36f9767db679 degraded the wan-lan speed for the BT HomeHub 5a (HH v5a)

openwrt ebilan forum member bill did the following tests

iperf3 results:

20180228 Openwrt r6331-916e33f netifd update to the latest version, rewrite RPSXPS
D 80.9 Mbps, U 93.4 Mbps

the file below is a 18.06.1 with netifd reverted to 810659a

bill's results:

iperf3 results:

OpenWrt 18.06.1 r7258-5eb055306f with LuCI, by 'maurer'
eth D 142 Mbps, U 143 Mbps
N/40MHz(300Mbps) D 70 Mbps, U 91 Mbps

OpenWrt 18.06.2  with LuCI, by 'maurer'
eth D 88-131 Mbits/sec,  U 115-145 Mbits/sec

compared to original stable release:

iperf3 results:

OpenWrt 18.06.1 r7258-5eb055306f

(Unmodified)
eth D 79.3 Mbps, U 74.3 Mbps
N/40MHz(300Mbps) D 71.8 Mbps, U 81.4? Mbps 

for more details see: https://openwrt.ebilan.co.uk/viewtopic.php?f=7&t=1105

the issue is tracked in:
https://bugs.openwrt.org/index.php?do=details&task_id=1852

my 18.06.1 build with speed fix for BT HH 5a:
https://anonfile.com/lbn8G1i9be

my 18.06.2 build with speed fix for BT HH 5a:
https://anonfile.com/q3b9iau8b5

The only difference from a official openwrt build is a patched netifd
source code here: https://github.com/maurerr/netifd

Thanks to post your results below

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#2

Do you think the problem is also affecting similar Lantiq device, like TP-Link TD-W8970 ?

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#3

it should affect all the multi core Lantiq devices

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#4

@maurer - Do you know if this has been fixed in the 18.06.2 (r7676) what was released january 2019 If so could you provide a iperf3 speedtest compared to 18.06.1 (r7258)
Thanks :slight_smile:

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#5

as you can see in the bug above there is no mention of a fix.
i hope i'll have time next week to compile 18.06.2 with the fix

LE - build is in the 1st post

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#8

Thanks very much for these files but I'm getting errors with your 18.06.2 image :frowning:

Invalid sysupgrade file.
Image check 'platform_check_image' failed.

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#9

please go to https://openwrt.ebilan.co.uk/viewtopic.php?f=7&t=1105 and report this

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