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Slow FTTP: Difference between revisions
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→Single thread Vs multi thread performance problems
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Sometimes a speed problem occurs for single-thread transfers, whist multi-thread transfers are OK. Broadly speaking, single thread Vs multi-thread speeds should be very similar, and near the top end of the speed of your circuit.
These can be tricky to diagnose
As well as testing the usual things (Different computer/router/directly-wired etc) to help diagnose, we suggest using iperf3 rather than http based speed tests as iperf3 is usually more reliable.
Support staff can give access to our own iperf server, and then you can run tests such as:
Single thread transfer from us to you (testing your download)
iperf3 -R -c <speedtest server>
10-thread transfer from us to you (testing your download)
iperf3 -R -P 10 -c <speedtest server>
Single thread transfer from you to us (testing your upload)
iperf3 -c <speedtest server>
10-thread transfer from you to us (testing your upload)
iperf3 -P 10 -c <speedtest server>
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