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FS#1852 - BT Home Hub 5A - 18.06 and snapshots - Drop in maximum WAN to LAN throughput #7360
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bill888: fyi, with the help of another user, maurer, on the ebilan forum, we're close to identifying the commit(s) that has caused the drop in WAN to LAN throughput on HH5A. Narrowed down to date range 26 Feb to 3 Mar 2018 at time of writing: |
bill888: Subject to review, we think we may have identified the commit which has caused the WAN to LAN throughput to drop suddenly on HH5A. 28 Feb 2018: [[https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=916e33fa1e14b97daf8c9bf07a1b36f9767db679|https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=916e33fa1e14b97daf8c9bf07a1b36f9767db679]]
20180228 Openwrt r6330-810659a
D 135 Mbps, U 126 Mbps
D 134 Mbps, U 141 Mbps
D 149 Mbps, U 139 Mbps (reflashed & retested)
I executed this command and rebooted the Home Hub 5A as suggested by 'maurer' There is an improvement but the figures are still lower than what was seen before the above mentioned commit was applied:
Full iperf3 test results included below for completeness:
LEDE 17.01.6
D 114 Mbps, U 105 Mbps
|
bill888: More iperf3 speed test results including very latest snapshot. using ethernet and 300Mbps 5 GHz Wireless N/40MHz
17.01.4
eth D 110 Mbps, U 101 Mbps
N/40MHz D 82.6 Mbps, U 99 Mbps
|
bill888: 'maurer' compiled a 18.06.1 sysupgrade image without the above mentioned commit. [[https://openwrt.ebilan.co.uk/viewtopic.php?f=7&t=1105&p=3159#p3158|https://openwrt.ebilan.co.uk/viewtopic.php?f=7&t=1105&p=3159#p3158]]
OpenWrt 18.06.1 r7258-5eb055306f (maurer) with LuCI
eth D 142 Mbps, U 143 Mbps
N/40MHz D 70 Mbps, U 91 Mbps
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bill888: Ooops. It's been over a year and I had forgotten I had opened this older ticket ! See newly opened ticket 2573 for latest update on this bug. Ticket to be closed. |
bill888:
I observed recently there has been a drop off in maximum throughput from WAN to LAN ports on Home Hub 5A. I don't have 100 Mbps VDSL2 connection, so I can't verify whether the same drop is visible from DSL to LAN port.
The issue is old snapshots were capable of 130 Mbps and LEDE 17.01 (k4.4) could manage 110 Mbps. However, 18.06.1 (k4.9) can only manage 80+ Mbps.....
I don't possess any snapshots between 9 Jan 2018 to 25 may 2018, and so cannot determine which commit may have caused this sudden drop in throughput.
Running iperf3 on Windows laptop in server mode connected to WAN port.
Running iperf3 on another Windows laptop in client mode connected to LAN port.
iperf3 results: (Down/Upload Mbps)
SMP enabled:
r3386 (eth1.2) 11 Feb 2017: 149/98 Mbps
r5172 26 Oct 2017: 148/138 Mbps
r5702 9 Jan 2018: 138/130 Mbps
I think switch to kernel 4.14 - 17 May 2018
r7044 (k4.14) 25 May 2018 iperf3: 81/78 Mbps without flow offloading
r8065 (k4.14) 17 Sep 2018 iperf3: 75/71 Mbps without flow offloading
17.01.4 (k4.4, no SMP) Oct 2017 104 mbps, iperf3: 115/106 Mbps
17.01.6 (k4.4, no SMP) Sep 2018 iperf3: 112/104 Mbps
18.06.1 (k4.9) Aug 2018 83 mbps, iperf3: 85/78 Mbps
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