[Cerowrt-devel] [Bloat] heisenbug: dslreports 16 flow test vs cablemodems

Eggert, Lars lars at netapp.com
Fri May 15 04:18:23 EDT 2015

On 2015-5-15, at 06:44, Aaron Wood <woody77 at gmail.com<mailto:woody77 at gmail.com>> wrote:
ICMP prioritization over TCP?


Ping in parallel to TCP is a hacky way to measure latencies; not only because of prioritization, but also because you don't measure TCP send/receive buffer latencies (and they can be large, auto-tuning is not so great.)

You really need to embed timestamps in the TCP bytestream and echo them back. See the recent netperf patch I sent.

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