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Old 22-07-2015, 14:36   #22
Chrysalis
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Re: New DSLReports speedtester

for reference

no QoS on router, using plusnet pppoe.

buffer bloat C-E it varied.

no QoS on router, using sky dhcp auth

buffer bloat usually B but sometimes C

egress QoS on router using plusnet buffer bloat usually A but sometimes B
same on sky buffer bloat always A

QoS on router for ingress and egress on both isp's the buffer bloat is either A or A+ every time.

Very good tester.

Generally for most activities downstream QoS probably isnt needed as a low amount of threads on downstream will generally increase latency by a moderate amount only, whilst on upstream even a single threaded upload can make latency sky rocket. However I observed e.g. on steam downloads using no QoS on ingress has a pretty nasty effect causing packet loss for all other traffic. Steam bombard's the connection with 20+ connections during downloading and it seems the buffer gets completely swamped, doing QoS with 2mbit topped of my download speed stops the packet loss.

Other observations.

When restricting upload speeds and reducing upload buffers generally uploading is still able to flatline at the configured limit even single threaded, however doing the same on downstream will cause the download speeds to bounce around a bit at a bit under 100% utilisation (sometimes less depending on the congestion control etc.) which some people may not find acceptable (I expect if is any isp congestion speeds would plummet as the connection with reduced buffers will be much more "polite"), however multithread downloads can still typically flatline at the configured speed (e.g. steam).
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